******************************************************************************* Revised: Mar 27, 2018 Tesla Roadster (spacecraft) -143205 (solution #10) Tesla Roadster (AKA: Starman, 2018-017A) NOTE: Visibility: 20th magnitude until Feb 20, 22nd magnitude through mid-April Brighter than 26th magnitude into mid-June 2018-Mar-01: Radial non-gravitational acceleration A1 estimated from data (nominally solar radiation pressure) 2018-Mar-27: Two reporting sites (J04 & K93) extend data arc one month. A1 estimate of s10 is reduced 1.2-sigma compared to s9. LAUNCHED: 2018-Feb-06 20:45 UTC by Falcon Heavy (FH-1) from Kennedy Space Center, USA (launchpad 39A) BACKGROUND: Dummy payload from the first launch of SpaceX Falcon Heavy launch vehicle. Consists of a standard Tesla Roadster automobile and a spacesuit-wearing mannequin nicknamed "Starman". Also includes a Hot Wheels toy model Roadster on the car's dash with a mini-Starman inside. A data storage device placed inside the car contains a copy of Isaac Asimov's "Foundation" novels. A plaque on the attachment fitting between the Falcon Heavy upper stage and the Tesla is etched with the names of more than 6,000 SpaceX employees. After orbiting the Earth for 5 hours, a third burn by the second stage was completed at approximately 02:30 UTC Feb 7, placing the dummy payload in a heliocentric orbit having a perihelion of 0.99 au and aphelion ~1.67 au. The object stack consists of a Merlin 1D Vacuum second stage with Extended Nozzle, Payload Attachment Fitting, and Tesla Roadster on mount. Roadster mass: ~1250 kg (with batteries), ~800 kg (without ESS/batteries) TRAJECTORY: This trajectory is based on JPL solution #10, a fit to 364 ground-based optical astrometric measurements spanning 2018 Feb 8.2 to March 19.1 Trajectory name Start (TDB) Stop (TDB) -------------------------------- ----------------- ----------------- tesla_s10 2018-Feb-07 03:00 2090-Jan-01 00:00 Encounter predictions for s10 (w/radial 1/r^2 non-gravitational acceleration) Date (TDB) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p ----------------- ----- ------- ------- ------- ------ ------ ------ ------ 2018 Feb 08.09690 Moon .000936 .000936 .000936 3.961 0.41 47509. 0.000 2020 Oct 07.26768 Mars .049530 .048923 .050242 8.150 27.40 6.63E5 0.000 2035 Apr 22.35934 Mars .015504 .004378 .027978 8.219 170.47 31247. 0.000 2047 Jan 11.89023 Earth .031919 .031716 .032123 4.493 249.70 78398. 0.000 2050 Mar 19.52949 Earth .119113 .113778 .124369 7.397 538.54 2.61E5 0.000 2052 Sep 05.15606 Mars .176363 .172469 .180319 5.738 2185.5 8.68E5 0.000 2067 Apr 15.90202 Mars .043270 .025712 .061471 7.192 1115.0 42565. 0.000 2084 Sep 17.92284 Mars .116962 .093449 .141170 9.753 787.45 6.55E5 0.000 2085 Jan 01.96490 Earth .083063 .049368 .112186 6.224 5208.9 1.00E5 0.000 2088 Mar 09.95754 Earth .049146 .033491 .063322 5.106 4505.2 1.17E5 0.000 Date = Nominal encounter time (Barycentric Dynamical Time) CA_Dist = Highest probability close approach distance to body, au MinDist = 3-sigma minimum encounter distance, au MaxDist = 3-sigma maximum encounter distance, au Vrel = Relative velocity at nominal encounter time, km/s TCA3Sg = 3-sigma uncertainty in close encounter time, minutes Nsigs = Number of sigmas to encounter body at nominal encounter time P_i/p = Linearized probability of impact NOTE: How to obtain optional statistical uncertainty output & generate an SPK file: Since this is a spacecraft and not part of the asteroid and comet database which normally holds orbit covariance data, some functions like statistical output and SPK file generation aren't automatically available for this object. However, such optional extended output is possible with some extra steps. To propagate statistical uncertainties for this object, the full statistical orbit solution (given below) can be manually input back into Horizons as a "user-defined object" using the telnet or e-mail interfaces (not possible with the browser interface). To do this and activate statistical or SPK file output ... Using the telnet interface (command-line "telnet ssd.jpl.nasa.gov 6775"), enter ";" to drop into user-input mode then cut-and-paste each line shown below, one at a time. The lines of numbers after SRC must be in the order shown. For SPK file generation, only the first four lines need be input: the EPOCH, orbital element lines starting with "EC" and "OM", and the non-gravitational acceleration model (line starting with "A1"). SRC lines are needed only for (optional) statistical output and the H & G values only for (optional) visual magnitude output. EPOCH= 2458164.5 EC= .2585469914787243 QR= .9860596231806226 TP= 2458153.620483722645 OM= 317.3549094214575 W = 177.3203028023227 IN= 1.088451292866039 EST=A1 A1= 2.960683526738534E-9 R0= 1. ALN= 1. NM= 2. NK= 0. SRC= -2.057839421666802E-7 7.966781900129693E-9 -1.720426606925749E-9 -4.722542923190676E-7 2.197679131968537E-9 -1.230413802372471E-6 -2.500290306870021E-7 -3.361070889248183E-9 -1.765963020682463E-5 -3.047907547965759E-7 -4.640202045440381E-7 -4.271481116360573E-9 2.657789409005983E-5 1.726818074599357E-6 -1.359673746135991E-6 -2.478836748687631E-5 -2.309863204867099E-8 -.0002351644867403515 -1.875169281895894E-6 -2.063647245529267E-6 -1.670539551586607E-6 -4.019207817588603E-6 -3.128134469402375E-9 -3.034540373576942E-5 1.733661692209129E-7 -7.052327854535979E-7 -2.650181216776434E-7 -1.310976135791957E-10 H= 25.289 G= 0.15 When done, press a blank return to exit input mode. Enter "J" at the prompt to indicate heliocentric J2000 ecliptic data has been supplied. Then at the next prompt, input an arbitrary name (i.e., Roadster). Horizons will then proceed as usual, but with statistical output and SPK file generation now available as options. A basic and identical tracking ephemeris can be produced without doing any of this, but statistical uncertainty quantities requested will be marked "n.a.", meaning not available, and SPK generation won't be an option. NOTE: long-term predictions Over time, trajectory prediction errors could increase more rapidly than the formal statistics indicate due to unmodeled thermal re-radiation or outgassing accelerations that are not currently characterized but may exist. ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu Apr 25 02:48:37 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: SpaceX Roadster (spacecraft) (-143205) {source: tesla_s10} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2022-Jan-01 10:00:00.0000 UT Stop time : A.D. 2022-Jan-02 00:00:00.0000 UT Step-size : 60 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 0.0, 0.0, -6378.137 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.0, 0.0, 0.0 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : ITRF93 {East-longitude positive} Center radii : 6378.137, 6378.137, 6356.752 km {Equator_a, b, pole_c} Target primary : Earth Vis. interferer : MOON (R_eq= 1737.400) km {source: DE441} Rel. light bend : Sun {source: DE441} Rel. lght bnd GM: 1.3271E+11 km^3/s^2 Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Calendar mode : Mixed Julian/Gregorian EOP file : eop.240424.p240718 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-24. PREDICTS-> 2024-JUL-17 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation (-90.0deg=NO ),Airmass (>38.000=NO), Daylight (NO ) Table cut-offs 2: Solar elongation ( 0.0,180.0=NO ),Local Hour Angle( 0.0=NO ) Table cut-offs 3: RA/DEC angular rate ( 0.0=NO ) ******************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************** Date__(UT)__HR:MN R.A._____(ICRF)_____DEC R.A.__(a-apparent)__DEC dRA*cosD d(DEC)/dt Azi____(a-app)___Elev dAZ*cosE d(ELV)/dt X_(sat-primary)_Y SatPANG L_Ap_Sid_Time a-mass mag_ex APmag S-brt Illu% Def_illu ang-sep/v Ang-diam ObsSub-LON ObsSub-LAT SunSub-LON SunSub-LAT SN.ang SN.dist NP.ang NP.dist hEcl-Lon hEcl-Lat r rdot delta deldot 1-way_down_LT VmagSn VmagOb S-O-T /r S-T-O T-O-M/MN_Illu% O-P-T PsAng PsAMV PlAng Cnst TDB-UT ObsEcLon ObsEcLat N.Pole-RA N.Pole-DC GlxLon GlxLat L_Ap_SOL_Time 399_ins_LT RA_3sigma DEC_3sigma SMAA_3sig SMIA_3sig Theta Area_3sig POS_3sigma RNG_3sigma RNGRT_3sig DOP_S_3sig DOP_X_3sig RT_delay_3sig Tru_Anom L_Ap_Hour_Ang phi PAB-LON PAB-LAT App_Lon_Sun RA_(ICRF-a-apparnt)_DEC I_dRA*cosD I_d(DEC)/dt Sky_motion Sky_mot_PA RelVel-ANG Lun_Sky_Brt sky_SNR UT1-UTC ******************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************** $$SOE 2022-Jan-01 10:00 20 53 22.55 -17 20 49.5 20 54 34.73 -17 15 57.7 88.24745 25.92776 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.212 n.a. 97.68517 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.82 0.00 n.a. n.a. 328.4381 0.2146 1.648102465258 -1.6344653 2.42099773774819 7.6519749 20.13482421 20.1780395 45.5087546 30.2766 /T 17.5076 49.5/ 2.8123 n.a. 73.909 252.980 -0.25225 Cap 69.183903 311.2301057 0.1451938 n.a. n.a. 29.827692 -34.531399 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.5026 319.6830 0.1830 n.a. 20 53 21.34 -17 20 54.3 88.28927 25.78497 1.5329583 73.626818 9.6748596 n.a. n.a. -0.11047 2022-Jan-01 11:00 20 53 28.71 -17 20 23.7 20 54 40.89 -17 15 31.8 88.24804 25.94063 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.212 n.a. 97.68746 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.81 0.00 n.a. n.a. 328.4549 0.2149 1.648063110158 -1.6364177 2.42118180348707 7.6453273 20.13635504 20.1786766 45.5130182 30.2597 /T 17.4988 48.9/ 2.6470 n.a. 73.900 252.973 -0.25197 Cap 69.183904 311.2556574 0.1453899 n.a. n.a. 29.846655 -34.551616 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4938 319.7042 0.1832 n.a. 20 53 27.50 -17 20 28.6 88.28987 25.79790 1.5330283 73.619232 9.6654540 n.a. n.a. -0.11047 2022-Jan-01 12:00 20 53 34.88 -17 19 57.9 20 54 47.05 -17 15 05.9 88.24863 25.95349 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.212 n.a. 97.68975 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.80 0.00 n.a. n.a. 328.4718 0.2152 1.648023708077 -1.6383700 2.42136570923049 7.6386780 20.13788454 20.1793145 45.5172799 30.2428 /T 17.4901 48.3/ 2.4867 n.a. 73.892 252.965 -0.25169 Cap 69.183906 311.2812104 0.1455859 n.a. n.a. 29.865627 -34.571832 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4851 319.7254 0.1835 n.a. 20 53 33.67 -17 20 02.8 88.29046 25.81083 1.5330982 73.611649 9.6560485 n.a. n.a. -0.11046 2022-Jan-01 13:00 20 53 41.04 -17 19 32.0 20 54 53.21 -17 14 39.9 88.24922 25.96635 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.212 n.a. 97.69204 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.79 0.00 n.a. n.a. 328.4886 0.2156 1.647984259014 -1.6403223 2.42154945493562 7.6320270 20.13941271 20.1799532 45.5215400 30.2258 /T 17.4814 47.7/ 2.3314 n.a. 73.884 252.957 -0.25140 Cap 69.183907 311.3067645 0.1457818 n.a. n.a. 29.884610 -34.592045 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4764 319.7465 0.1838 n.a. 20 53 39.83 -17 19 36.9 88.29106 25.82375 1.5331682 73.604070 9.6466432 n.a. n.a. -0.11045 2022-Jan-01 14:00 20 53 47.21 -17 19 06.2 20 54 59.37 -17 14 13.9 88.24982 25.97920 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.212 n.a. 97.69433 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.79 0.00 n.a. n.a. 328.5054 0.2159 1.647944762971 -1.6422745 2.42173304055998 7.6253741 20.14093954 20.1805926 45.5257982 30.2089 /T 17.4727 47.1/ 2.1812 n.a. 73.876 252.950 -0.25112 Cap 69.183908 311.3323198 0.1459778 n.a. n.a. 29.903603 -34.612257 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4677 319.7677 0.1840 n.a. 20 53 46.00 -17 19 11.1 88.29165 25.83667 1.5332381 73.596493 9.6372381 n.a. n.a. -0.11045 2022-Jan-01 15:00 20 53 53.37 -17 18 40.4 20 55 05.54 -17 13 47.9 88.25041 25.99205 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.212 n.a. 97.69661 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.78 0.00 n.a. n.a. 328.5222 0.2162 1.647905219949 -1.6442267 2.42191646606135 7.6187195 20.14246504 20.1812328 45.5300547 30.1920 /T 17.4639 46.5/ 2.0360 n.a. 73.868 252.942 -0.25084 Cap 69.183909 311.3578763 0.1461737 n.a. n.a. 29.922605 -34.632466 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4589 319.7889 0.1843 n.a. 20 53 52.16 -17 18 45.3 88.29224 25.84958 1.5333081 73.588919 9.6278331 n.a. n.a. -0.11044 2022-Jan-01 16:00 20 53 59.54 -17 18 14.5 20 55 11.70 -17 13 21.9 88.25100 26.00490 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.211 n.a. 97.69890 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.77 0.00 n.a. n.a. 328.5391 0.2165 1.647865629950 -1.6461789 2.42209973139782 7.6120632 20.14398921 20.1818737 45.5343093 30.1751 /T 17.4552 45.9/ 1.8959 n.a. 73.859 252.934 -0.25055 Cap 69.183910 311.3834340 0.1463695 n.a. n.a. 29.941618 -34.652673 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4502 319.8101 0.1845 n.a. 20 53 58.33 -17 18 19.4 88.29283 25.86249 1.5333780 73.581348 9.6184283 n.a. n.a. -0.11044 2022-Jan-01 17:00 20 54 05.70 -17 17 48.6 20 55 17.86 -17 12 55.9 88.25158 26.01774 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.211 n.a. 97.70118 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.76 0.00 n.a. n.a. 328.5559 0.2168 1.647825992975 -1.6481309 2.42228283652774 7.6054052 20.14551205 20.1825155 45.5385621 30.1581 /T 17.4465 45.3/ 1.7610 n.a. 73.851 252.927 -0.25027 Cap 69.183912 311.4089929 0.1465654 n.a. n.a. 29.960641 -34.672879 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4415 319.8313 0.1848 n.a. 20 54 04.49 -17 17 53.5 88.29343 25.87539 1.5334479 73.573781 9.6090237 n.a. n.a. -0.11043 2022-Jan-01 18:00 20 54 11.87 -17 17 22.8 20 55 24.02 -17 12 29.9 88.25217 26.03058 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.211 n.a. 97.70346 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.75 0.00 n.a. n.a. 328.5727 0.2171 1.647786309024 -1.6500830 2.42246578140983 7.5987454 20.14703356 20.1831580 45.5428132 30.1412 /T 17.4378 44.7/ 1.6311 n.a. 73.843 252.919 -0.24999 Cap 69.183913 311.4345529 0.1467611 n.a. n.a. 29.979674 -34.693082 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4328 319.8525 0.1850 n.a. 20 54 10.66 -17 17 27.7 88.29402 25.88829 1.5335178 73.566216 9.5996193 n.a. n.a. -0.11042 2022-Jan-01 19:00 20 54 18.03 -17 16 56.9 20 55 30.18 -17 12 03.8 88.25276 26.04342 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.211 n.a. 97.70574 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.74 0.00 n.a. n.a. 328.5895 0.2174 1.647746578099 -1.6520350 2.42264856600309 7.5920839 20.14855373 20.1838012 45.5470623 30.1243 /T 17.4290 44.1/ 1.5065 n.a. 73.835 252.912 -0.24970 Cap 69.183914 311.4601141 0.1469569 n.a. n.a. 29.998718 -34.713284 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4240 319.8737 0.1853 n.a. 20 54 16.82 -17 17 01.8 88.29461 25.90119 1.5335878 73.558654 9.5902152 n.a. n.a. -0.11041 2022-Jan-01 20:00 20 54 24.20 -17 16 30.9 20 55 36.34 -17 11 37.8 88.25335 26.05625 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.211 n.a. 97.70802 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.74 0.00 n.a. n.a. 328.6064 0.2177 1.647706800201 -1.6539869 2.42283119026684 7.5854208 20.15007257 20.1844453 45.5513097 30.1074 /T 17.4203 43.5/ 1.3869 n.a. 73.827 252.904 -0.24942 Cap 69.183915 311.4856765 0.1471526 n.a. n.a. 30.017771 -34.733483 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4153 319.8949 0.1855 n.a. 20 54 22.99 -17 16 35.9 88.29519 25.91408 1.5336577 73.551095 9.5808113 n.a. n.a. -0.11041 2022-Jan-01 21:00 20 54 30.36 -17 16 05.0 20 55 42.49 -17 11 11.7 88.25393 26.06907 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.211 n.a. 97.71030 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.73 0.00 n.a. n.a. 328.6232 0.2180 1.647666975331 -1.6559388 2.42301365416071 7.5787560 20.15159008 20.1850901 45.5555552 30.0904 /T 17.4116 42.9/ 1.2726 n.a. 73.818 252.896 -0.24914 Cap 69.183917 311.5112400 0.1473483 n.a. n.a. 30.036835 -34.753680 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.4066 319.9161 0.1858 n.a. 20 54 29.15 -17 16 09.9 88.29578 25.92697 1.5337276 73.543540 9.5714078 n.a. n.a. -0.11040 2022-Jan-01 22:00 20 54 36.53 -17 15 39.1 20 55 48.65 -17 10 45.6 88.25452 26.08189 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.210 n.a. 97.71258 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.72 0.00 n.a. n.a. 328.6400 0.2183 1.647627103491 -1.6578907 2.42319595764469 7.5720895 20.15310625 20.1857357 45.5597988 30.0735 /T 17.4028 42.3/ 1.1635 n.a. 73.810 252.889 -0.24885 Cap 69.183918 311.5368048 0.1475440 n.a. n.a. 30.055909 -34.773876 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.3978 319.9373 0.1860 n.a. 20 54 35.31 -17 15 44.0 88.29637 25.93986 1.5337975 73.535987 9.5620045 n.a. n.a. -0.11039 2022-Jan-01 23:00 20 54 42.69 -17 15 13.1 20 55 54.81 -17 10 19.6 88.25510 26.09471 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.210 n.a. 97.71486 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.71 0.00 n.a. n.a. 328.6569 0.2186 1.647587184681 -1.6598425 2.42337810067907 7.5654214 20.15462109 20.1863820 45.5640406 30.0566 /T 17.3941 41.7/ 1.0595 n.a. 73.802 252.881 -0.24857 Cap 69.183919 311.5623707 0.1477396 n.a. n.a. 30.074993 -34.794069 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.3891 319.9585 0.1863 n.a. 20 54 41.48 -17 15 18.1 88.29695 25.95274 1.5338674 73.528437 9.5526015 n.a. n.a. -0.11038 2022-Jan-02 00:00 20 54 48.85 -17 14 47.2 20 56 00.97 -17 09 53.5 88.25568 26.10753 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 29.210 n.a. 97.71714 n.a. 0.0/* n.a. n.a. n.a. n.a. n.a. 253.70 0.00 n.a. n.a. 328.6737 0.2190 1.647547218903 -1.6617942 2.42356008322447 7.5587517 20.15613459 20.1870291 45.5682805 30.0397 /T 17.3854 41.1/ 0.9608 n.a. 73.794 252.874 -0.24829 Cap 69.183920 311.5879377 0.1479352 n.a. n.a. 30.094087 -34.814260 n.a. 0.000000 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 17.3804 319.9797 0.1865 n.a. 20 54 47.64 -17 14 52.1 88.29754 25.96561 1.5339372 73.520891 9.5431988 n.a. n.a. -0.11037 $$EOE ******************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************** Column meaning: TIME Times PRIOR to 1962 are UT1, a mean-solar time closely related to the prior but now-deprecated GMT. Times AFTER 1962 are in UTC, the current civil or "wall-clock" time-scale. UTC is kept within 0.9 seconds of UT1 using integer leap-seconds for 1972 and later years. Conversion from the internal Barycentric Dynamical Time (TDB) of solar system dynamics to the non-uniform civil UT time-scale requested for output has not been determined for UTC times after the next July or January 1st. Therefore, the last known leap-second is used as a constant over future intervals. Time tags refer to the UT time-scale conversion from TDB on Earth regardless of observer location within the solar system, although clock rates may differ due to the local gravity field and no analog to "UT" may be defined for that location. Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D. date. CALENDAR SYSTEM Mixed calendar mode was active such that calendar dates after AD 1582-Oct-15 (if any) are in the modern Gregorian system. Dates prior to 1582-Oct-5 (if any) are in the Julian calendar system, which is automatically extended for dates prior to its adoption on 45-Jan-1 BC. The Julian calendar is useful for matching historical dates. The Gregorian calendar more accurately corresponds to the Earth's orbital motion and seasons. A "Gregorian-only" calendar mode is available if such physical events are the primary interest. NOTE: "n.a." in output means quantity "not available" at the print-time. 'R.A._____(ICRF)_____DEC' = Astrometric right ascension and declination of the target center with respect to the observing site (coordinate origin) in the reference frame of the planetary ephemeris (ICRF). Compensated for down-leg light-time delay aberration. Units: RA in hours-minutes-seconds of time, HH MM SS.ff{ffff} DEC in degrees-minutes-seconds of arc, sDD MN SC.f{ffff} 'R.A.__(a-apparent)__DEC' = Airless apparent right ascension and declination of the target center with respect to an instantaneous reference frame defined by the Earth equator of-date (z-axis) and meridian containing the Earth equinox of-date (x-axis, EOP-corrected IAU76/80). Compensated for down-leg light-time delay, gravitational deflection of light, stellar aberration, precession & nutation. Note: equinox (RA origin) is offset -53 mas from the of-date frame defined by the IAU06/00a P & N system. Units: RA in hours-minutes-seconds of time, HH MM SS.ff{ffff} DEC in degrees-minutes-seconds of arc, sDD MN SC.f{ffff} 'dRA*cosD d(DEC)/dt' = The angular rate of change in aparent RA and DEC of the target. This is with respect to the non-inertial IAU76/80 Earth true equator and equinox of-date reference frame. d(RA)/dt is multiplied by the cosine of declination to provide a linear rate in the plane-of-sky. Units: ARCSECONDS PER HOUR 'Azi____(a-app)___Elev' = Airless apparent azimuth and elevation of target center. Compensated for light-time, the gravitational deflection of light, stellar aberration, precession and nutation. Azimuth is measured clockwise from north: North(0) -> East(90) -> South(180) -> West(270) -> North (360) Elevation angle is with respect to a plane perpendicular to the reference surface local zenith direction. TOPOCENTRIC ONLY. Units: DEGREES 'dAZ*cosE d(ELV)/dt' = The rate of change of target center apparent azimuth and elevation (airless). d(AZ)/dt is multiplied by the cosine of the elevation angle. TOPOCENTRIC ONLY. Units: ARCSECOND PER MINUTE 'X_(sat-primary)_Y SatPANG' = Satellite apparent differential coordinates in the plane-of-sky with respect to the primary body along with the satellite position angle. Differential coordinates are defined in RA as: X= ((RA_sat - RA_primary) * cosine(DEC_primary)) ... and in DEC as: Y= (DEC_sat - DEC_primary) Non-lunar satellites only. "SatPANG" is the counter-clockwise (CCW) position angle from the reference-frame of-date north-pole to a line from the primary center to the satellite center. Units: ARCSECONDS (X & Y), DEGREES (pos, angle) 'L_Ap_Sid_Time' = Local Apparent Sidereal Time. The angle measured westward in the body true-equator of-date plane from the meridian containing the body-fixed observer to the meridian containing the true Earth equinox (defined by intersection of the true Earth equator of date with the ecliptic of date). TOPOCENTRIC ONLY. Units: HH MM SS.ffff (hours-minutes-seconds of time) 'a-mass mag_ex' = RELATIVE optical airmass and visual magnitude extinction. Airmass is the ratio between the absolute optical airmass for the targets' refracted CENTER point to the absolute optical airmass at zenith. Also output is the estimated visual magnitude extinction due to the atmosphere, as seen by the observer. AVAILABLE ONLY FOR TOPOCENTRIC EARTH SITES WHEN THE TARGET IS ABOVE THE HORIZON. Units: none (airmass) and magnitudes (extinction). 'APmag S-brt' = The targets' approximate apparent visual magnitude and surface brightness. For planets and natural satellites, output is restricted to solar phase angles covered by observational data. Outside the observed phase angle range, "n.a." may be output to avoid extrapolation beyond the limit of model validity. For Earth-based observers, the estimated dimming due to atmospheric absorption (extinction) is available as a separate, requestable quantity. Surface brightness is the average airless visual magnitude of a square-arcsecond of the illuminated portion of the apparent disk. It is computed only if the target radius is known. Units: MAGNITUDES & MAGNITUDES PER SQUARE ARCSECOND 'Illu%' = Fraction of the target objects' assumed circular disk illuminated by Sun (phase), as seen by the observer. Units: PERCENT 'Def_illu' = Defect of illumination. The maximum angular width of the target body's assumed circular disk diameter NOT illuminated by the Sun. Units: ARCSECONDS 'ang-sep/v' = The angular separation between the center of the target object and the center of the (remote) primary body it revolves around, as seen by the observer, with target visibility code. Visibility codes (refers to limb-to-limb): /t = Transiting primary body disk /O = Occulted by primary body disk /p = Partial umbral eclipse /P = Occulted partial umbral eclipse /u = Total umbral eclipse /U = Occulted total umbral eclipse /- = Target is the primary body /* = None of above ("free and clear") The radius of both primary and target body is taken to be the equatorial value (maximum, given a triaxial shape). Atmospheric effects and oblateness aspect are NOT currently considered. Light-time is considered. Units: ARCSECONDS and visibility code 'Ang-diam' = The equatorial angular width of the target body full disk, if it were fully illuminated and visible to the observer. If the target body diameter is unknown "n.a." is output. Units: ARCSECONDS 'ObsSub-LON ObsSub-LAT' = Apparent planetodetic longitude and latitude of the center of the target disc seen by the OBSERVER at print-time. This is NOT exactly the same as the "nearest" sub-point for a non-spherical target shape (since the center of the disc might not be the point closest to the observer), but is generally very close if not a very irregular body shape. Down-leg light travel-time from target to observer is taken into account. Latitude is the angle between the equatorial plane and the line perpendicular to the reference ellipsoid of the body, so includes body oblateness. The reference ellipsoid is an oblate spheroid with a single flatness coefficient in which the y-axis body radius is taken to be the same value as the x-axis radius. Positive longitude is to the WEST for this target. Cartographic system is given in the header. Units: DEGREES DEGREES 'SunSub-LON SunSub-LAT' = Apparent sub-solar longitude and latitude of the Sun on the target. The apparent planetodetic longitude and latitude of the center of the target disc as seen from the Sun, as seen by the observer at print-time. This is NOT exactly the same as the "sub-solar" (nearest) point for a non-spherical target shape (since the center of the disc seen from the Sun might not be the closest point to the Sun), but is very close if not a highly irregular body shape. Light travel-time from Sun to target and from target to observer is taken into account. Latitude is the angle between the equatorial plane and the line perpendicular to the reference ellipsoid of the body. The reference ellipsoid is an oblate spheroid with a single flatness coefficient in which the y-axis body radius is taken to be the same value as the x-axis radius. Positive longitude is to the WEST for this target. Cartographic system is given in the header. Units: DEGREES DEGREES 'SN.ang SN.dist' = Targets' apparent sub-solar point position angle (counter-clockwise with respect to the direction of the true-of-date reference-frame north-pole) and its angular distance from the sub-observer point (center of disk) at print time. A negative distance indicates the sub-solar point is on the hidden hemisphere. Units: DEGREES and ARCSECONDS 'NP.ang NP.dist' = Targets' apparent north-pole position angle (counter-clockwise with respect to the direction of the true-of-date reference-frame north-pole) and its angular distance from the sub-observer point (center of disk) at observation time. A negative distance indicates the planets' north-pole is on the hidden hemisphere. Units: DEGREES and ARCSECONDS 'hEcl-Lon hEcl-Lat' = Geometric heliocentric J2000 ecliptic longitude and latitude of target center at the instant light leaves it to be observed at print time (print time minus down-leg light-time). Units: DEGREES 'r rdot' = The Sun's apparent range ("r", light-time aberrated) and range-rate ("rdot") relative to the target center, as seen by the observer. A positive "rdot" means the target center was moving away from the Sun, negative means moving toward the Sun. Units: AU and KM/S 'delta deldot' = Apparent range ("delta", light-time aberrated) and range-rate ("delta-dot") of the target center relative to the observer. A positive "deldot" means the target center is moving away from the observer, negative indicates movement toward the observer. Units: AU and KM/S '1-way_down_LT' = 1-way down-leg light-time from target center to observer. The elapsed time since light (observed at print-time) would have left or reflected off a point at the center of the target. Units: MINUTES 'VmagSn VmagOb' = Magnitude of target centers' velocity with respect to the Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus down-leg light-time). These are absolute values of the velocity vectors (total speeds) and do NOT indicate direction of motion. Units: KM/S 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES 'S-T-O' = The Sun-Target-Observer angle; the interior vertex angle at target center formed by a vector from the target to the apparent center of the Sun (at reflection time on the target) and the apparent vector from target to the observer at print-time. Slightly different from true PHASE ANGLE (requestable separately) at the few arcsecond level in that it includes stellar aberration on the down-leg from target to observer. Units: DEGREES 'T-O-M/MN_Illu%' = Target-Observer-Moon LUNAR ELONGATION angle and illuminated percentage. The apparent lunar elongation angle between target body center and Moon center, seen from the observing site, along with fraction of the lunar disk illuminated by the Sun. A negative lunar elongation angle indicates the target center is behind the Moon. Units: DEGREES & PERCENT 'O-P-T' = Observer-Primary-Target angle; apparent angle between a target satellite, its primarys' center and an observer at print time. Interior vertex angle at the primary. Units: DEGREES 'PsAng PsAMV' = The position angles of the extended Sun-to-target radius vector ("PsAng") and the negative of the targets' heliocentric velocity vector ("PsAMV"), as seen in the observers' plane-of-sky, measured counter-clockwise (east) from reference-frame north-pole. Primarily intended for ACTIVE COMETS, "PsAng" is an indicator of the comets' gas-tail orientation in the sky (being in the anti-sunward direction) while "PsAMV" is an indicator of dust-tail orientation. Units: DEGREES 'PlAng' = Angle between observer and target orbital plane, measured from center of target at the moment light seen at observation time leaves the target. Positive values indicate observer is above the objects' orbital plane, in the direction of reference-frame +z axis. Units: DEGREES 'Cnst' = Constellation ID; the 3-letter abbreviation for the name of the constellation containing the target centers' astrometric position, as defined by IAU (1930) boundary delineation. See documentation for list of abbreviations. 'TDB-UT' = Difference between the uniform Barycentric Dynamical time-scale and the Earth-rotation dependent Universal Time. Prior to 1962, the difference is with respect to UT1 (TDB-UT1) and the 0.002 second maximum amplitude distinction between TT and TDB is not maintained. For 1962 and later, the difference is with respect to UTC (TDB-UTC) and periodic terms less than 1.e-6 second are ignored. Values beyond the next July or January 1st may change if a leap-second is later required by the IERS. Values from the present date forward through the next ~78 days are predictions. Beyond that prediction interval, the last prediction is taken as a constant for all future dates. Units: SECONDS 'ObsEcLon ObsEcLat' = Observer-centered IAU76/80 ecliptic-of-date longitude and latitude of the target centers' apparent position, with light-time, gravitational deflection of light, and stellar aberrations. Units: DEGREES 'N.Pole-RA N.Pole-DC' = ICRF right ascension and declination of the target body's north-pole direction at the time light left the body to be observed at print time. Target pole/rotation model is given in the header. Units: DEGREES 'GlxLon GlxLat' = Observer-centered Galactic System II (post WW II) longitude and latitude of the target centers' apparent position, with light-time, gravitational deflection of light, and stellar aberrations. Units: DEGREES 'L_Ap_SOL_Time' = Local Apparent SOLAR Time for observing site. This is the time indicated by a sundial. TOPOCENTRIC ONLY. Units: HH MM SS.ffff (sexagesimal angular hours) '399_ins_LT' = Instantaneous light-time of the station with respect to Earth center at print-time. The geometric (or "true") separation of site and Earth center, divided by the speed of light. Units: MINUTES 'RA_3sigma DEC_3sigma' = Uncertainty in Right-Ascension and Declination. Output values are the formal +/- 3 standard-deviations (sigmas) around nominal position. Units: ARCSECONDS 'SMAA_3sig SMIA_3sig Theta Area_3sig' = Plane-of-sky (POS) error ellipse data. These quantities summarize the targets' 3-dimensional 3-standard-deviation formal uncertainty volume projected into a reference plane perpendicular to the observers' line-of-sight. SMAA_3sig = Angular width of the 3-sigma error ellipse semi-major axis in POS. Units: ARCSECONDS. SMIA_3sig = Angular width of the 3-sigma error ellipse semi-minor axis in POS. Units: ARCSECONDS. Theta = Orientation angle of the error ellipse in POS; the clockwise angle from the direction of increasing RA to the semi-major axis of the error ellipse, in the direction of increasing DEC. Units: DEGREES. Area_3sig = Area of sky enclosed by the 3-sigma error ellipse. Units: ARCSECONDS ^ 2. 'POS_3sigma' = The Root-Sum-of-Squares (RSS) of the 3-standard deviation plane-of-sky error ellipse major and minor axes. This single pointing uncertainty number gives an angular distance (a circular radius) from the targets' nominal position in the sky that encompasses the error-ellipse. Units: ARCSECONDS. 'RNG_3sigma RNGRT_3sig' = Range and range rate (radial velocity) formal 3-standard-deviation uncertainties. Units: KM, KM/S 'DOP_S_3sig DOP_X_3sig RT_delay_3sig' = Doppler radar uncertainties at S-band (2380 MHz) and X-band (8560 MHz) frequencies, along with the round-trip (total) delay to first-order. Units: HERTZ and SECONDS 'Tru_Anom' = Apparent true anomaly angle of the targets' heliocentric orbit position; the angle in the targets' instantaneous orbit plane from the orbital periapse direction to the target, measured positively in the direction of motion. The position of the target is taken to be at the moment light seen by the observer at print-time would have left the center of the object. That is, the heliocentric position of the target used to compute the true anomaly is one down-leg light-time prior to the print-time. Units: DEGREES 'L_Ap_Hour_Ang' = Local apparent HOUR ANGLE of target at observing site. The angle between the observers' meridian plane, containing Earth's axis of-date and local zenith direction, and a great circle passing through Earth's axis-of-date and the targets' direction, measured westward from the zenith meridian to target meridian along the equator. Negative values are angular times UNTIL transit. Positive values are angular times SINCE transit. Exactly 24_hrs/360_degrees. EARTH TOPOCENTRIC ONLY. Units: sHH MM SS.fff (sexagesimal angular hours) 'phi PAB-LON PAB-LAT' = "phi" is the true PHASE ANGLE at the observers' location at print time. "PAB-LON" and "PAB-LAT" are the J2000 ecliptic longitude and latitude of the phase angle bisector direction; the outward directed angle bisecting the arc created by the apparent vector from Sun to target center and the astrometric vector from observer to target center. For an otherwise uniform ellipsoid, the time when its long-axis is perpendicular to the PAB direction approximately corresponds to lightcurve maximum (or maximum brightness) of the body. PAB is discussed in Harris et al., Icarus 57, 251-258 (1984). Units: DEGREES, DEGREES, DEGREES 'App_Lon_Sun' = The apparent target-centered longitude of the Sun ("apparent L_s") as seen at the target when the light recorded by the observer at print-time reflected off the target. It is referred to a coordinate system where the x-axis is the equinox direction defined by the targets' instantaneous IAU2015 pole direction and heliocentric orbit plane at reflection time, and is measured positively in an eastward direction (counter-clockwise around the positive pole of the solar system angular momentum vector). On bodies other than the Earth, the quantity can indicate boundary dates for the seasons: Northern hemisphere Southern hemisphere 0= Spring Equinox 0= Autumn Equinox 90= Summer Solstice 90= Winter Solstice 180= Autumn Equinox 180= Spring Equinox 270= Winter Solstice 270= Summer Solstice For Earth seasons, instead see quantity #31 ("ObsEcLon") as seen from the geocenter, with the Sun as a target. If the target has no associated spin-pole model (common for asteroids and comets), "n.a." will be output. Units: DEGREES 'RA_(ICRF-a-apparnt)_DEC' = Airless apparent right ascension and declination coordinates of the target in the ICRF reference frame, with down-leg light-time, gravitational deflection of light, and stellar aberration. Units: RA : HH MM SS.ff{ffff} (hours-minutes-seconds of time) DEC: DG MN SC.f{ffff} (degrees-minutes-seconds of arc) 'I_dRA*cosD I_d(DEC)/dt' = The angular rate of change in the targets' ICRF inertial reference-frame apparent RA and DEC, with light-time, gravitational light deflection, and stellar aberrations. d(RA)/dt is multiplied by the cosine of declination to provide a linear rate in the plane-of-sky. Units: ARCSECONDS PER HOUR 'Sky_motion Sky_mot_PA RelVel-ANG' = Total apparent angular rate of the target in the plane-of-sky. "Sky_mot_PA" is the position angle of the target's direction of motion in the plane-of-sky, measured counter-clockwise from the apparent of-date north pole direction. "RelVel-ANG" is the flight path angle of the target's relative motion with respect to the observer's line-of-sight, in the range [-90,+90], where positive values indicate motion away from the observer, negative values are toward the observer: -90 = target is moving directly toward the observer 0 = target is moving at right angles to the observer's line-of-sight +90 = target is moving directly away from the observer UNITS: ARCSECONDS/MINUTE, DEGREES, DEGREES 'Lun_Sky_Brt sky_SNR' = Sky brightness due to moonlight scattered by Earth's atmosphere at the target's position in the sky. "sky_SNR" is the visual signal-to-noise ratio (SNR) of the target's surface brightness relative to background sky. Output only for topocentric Earth observers when both the Moon and target are above the local horizon and the Sun is in astronomical twilight (or further) below the horizon, and the target is not the Moon or Sun. If all conditions are not met, "n.a." is output. Galactic brightness, local sky light-pollution and weather are NOT considered. Lunar opposition surge is considered. The value returned is accurate under ideal conditions at the approximately 8-23% level, so is a useful but not definitive value. If the target-body radius is also known, "sky_SNR" is output. This is the approximate visual signal-to-noise ratio of the target's brightness divided by lunar sky brightness. When sky_SNR < 1, the target is dimmer than the ideal moonlight-scattering background sky, so unlikely to be detectable at visual wavelengths. In practice, visibility requires sky_SNR > 1 and a detector sensitive enough to reach the target's magnitude, even if it isn't washed out by moonlight. When relating magnitudes and brightness values, keep in mind their logarithmic relationship m2-m1 = -2.5*log_10(b2/b1). UNITS: VISUAL MAGNITUDES / ARCSECOND^2, and unitless ratio 'UT1-UTC' = Difference between the UT1 and UTC timescales ("DUT1"). UT1 is the Earth-rotation dependent mean solar time on the Greenwich meridian sometimes referred to as GMT. UTC is a discontinuous timescale derived from the atomic TAI timescale, adjusted by leap seconds to provide a civil timescale maintained within 0.9 seconds of UT1. Therefore, the difference UT1-UTC will have discontinuities where leap-seconds are inserted in UTC. UTC is not well-defined prior to 1962, so "n.a." will be returned for earlier dates. The UT1 here is a JPL fit to measurements of the Earth rotation which can change rapidly and unpredictably at the 10^-4 second level due to tides and other factors affecting Earth rotation. Values for the 14 days prior to the present date are considered provisional and may change at up to the 0.002 second level as data accumulates, corresponding to about 1-meter (3-sigma) for an Earth equatorial site. Values from the present date forward through the next ~78 days are predictions. Beyond that prediction interval, the last prediction is taken as a constant for all future dates. Units: SECONDS Computations by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA General site: https://ssd.jpl.nasa.gov/ Mailing list: https://ssd.jpl.nasa.gov/email_list.html System news : https://ssd.jpl.nasa.gov/horizons/news.html User Guide : https://ssd.jpl.nasa.gov/horizons/manual.html Connect : browser https://ssd.jpl.nasa.gov/horizons/app.html#/x API https://ssd-api.jpl.nasa.gov/doc/horizons.html command-line telnet ssd.jpl.nasa.gov 6775 e-mail/batch https://ssd.jpl.nasa.gov/ftp/ssd/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************** !$$SOF COMMAND = -143205