API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Dec 10, 2024 MMS-1 Spacecraft / (Earth) -140482 https://www.nasa.gov/mission_pages/mms/index.html MMS 1 Magnetospheric Multiscale (MMS) mission: the first of four identically instrumented space physics spacecraft studying the Earth's magnetosphere. Octagonal in shape; 2.5-m wide, 1.2-m high, spinning at 3 rpm during science operations. Eight deployable booms: four 60-meter wire booms, two 12.5 meter booms, two 5-m booms. Mass: 1250 kg; 318 W power generation; S-band communications. NOTE: The spacecraft may be maneuvered frequently. Therefore, the JSpOC TLE-based trajectory provided here may at times depart from the actual trajectory. This can happen because TLEs do not model thruster firings; the TLE trajectory solutions must be reinitialized after each event. Launched: 2015-Mar-13 02:44 UTC (Atlas V, Cape Canaveral, USA) ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Thu Dec 12 03:22:51 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-1 (spacecraft) (-140482) {source: MMS-1} Center body name: Earth (399) {source: DE441} Center-site name: SATINO Remote Observatory, Haute Provence ******************************************************************************* Start time : A.D. 2024-Nov-30 00:00:00.0000 UT Stop time : A.D. 2024-Dec-01 00:00:00.0000 UT Step-size : 10 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 5.7124, 43.9320269, .703985 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 5.7124, 4601.22659, 4403.14405 {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 RTS-only print : NO EOP file : eop.241211.p250309 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-DEC-11. PREDICTS-> 2025-MAR-08 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation ( 0.0deg=YES),Airmass (>38.000=NO), Daylight (YES) Table cut-offs 2: Solar elongation ( 12.0,180.0=YES),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 Azi____(a-app)___Elev APmag S-brt r rdot delta deldot S-O-T /r S-T-O T-O-M/MN_Illu% RA_3sigma DEC_3sigma Sky_motion Sky_mot_PA RelVel-ANG *************************************************************************************************************************************************************************************************************************************************** $$SOE >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< 2024-Nov-30 16:10 C 23 37 55.81 -14 27 20.5 141.198454 22.880932 n.a. n.a. 0.986356790921 0.0381666 0.00105554668131 -0.9476317 100.3535 /T 79.5860 106.4/ 0.5921 n.a. n.a. 31.225057 9.4926579 -67.19687 2024-Nov-30 16:20 C 23 37 59.13 -14 22 10.4 143.502847 24.054425 n.a. n.a. 0.986356938990 0.0367249 0.00105174743257 -0.9447156 100.3962 /T 79.5435 106.4/ 0.5838 n.a. n.a. 31.556559 8.2511732 -66.99070 2024-Nov-30 16:30 C 23 38 02.02 -14 16 55.9 145.864270 25.172008 n.a. n.a. 0.986357081235 0.0352600 0.00104796047713 -0.9414901 100.4380 /T 79.5020 106.4/ 0.5753 n.a. n.a. 31.915878 7.0956084 -66.76028 2024-Nov-30 16:40 N 23 38 04.53 -14 11 36.9 148.283095 26.230360 n.a. n.a. 0.986357217563 0.0337714 0.00104418701213 -0.9379772 100.4788 /T 79.4614 106.3/ 0.5668 n.a. n.a. 32.300257 6.0286011 -66.50783 2024-Nov-30 16:50 N 23 38 06.67 -14 06 13.4 150.759197 27.226127 n.a. n.a. 0.986357347876 0.0322587 0.00104042814454 -0.9341998 100.5188 /T 79.4216 106.3/ 0.5582 n.a. n.a. 32.706969 5.0519809 -66.23554 2024-Nov-30 17:00 N 23 38 08.47 -14 00 45.3 153.291897 28.155957 n.a. n.a. 0.986357472077 0.0307214 0.00103668488794 -0.9301815 100.5581 /T 79.3825 106.3/ 0.5496 n.a. n.a. 33.133353 4.1668526 -65.94560 2024-Nov-30 17:10 A 23 38 09.96 -13 55 12.5 155.879904 29.016529 n.a. n.a. 0.986357590067 0.0291591 0.00103295815964 -0.9259467 100.5968 /T 79.3440 106.3/ 0.5409 n.a. n.a. 33.576850 3.3736829 -65.64009 2024-Nov-30 17:20 A 23 38 11.16 -13 49 34.9 158.521271 29.804600 n.a. n.a. 0.986357701744 0.0275712 0.00102924877790 -0.9215204 100.6350 /T 79.3060 106.2/ 0.5322 n.a. n.a. 34.035032 2.6723884 -65.32105 2024-Nov-30 17:30 A 23 38 12.12 -13 43 52.5 161.213358 30.517043 n.a. n.a. 0.986357807005 0.0259571 0.00102555745926 -0.9169283 100.6729 /T 79.2684 106.2/ 0.5234 n.a. n.a. 34.505626 2.0624209 -64.99043 2024-Nov-30 17:40 A 23 38 12.85 -13 38 05.2 163.952810 31.150903 n.a. n.a. 0.986357905742 0.0243165 0.00102188481630 -0.9121965 100.7106 /T 79.2309 106.2/ 0.5146 n.a. n.a. 34.986536 1.5428463 -64.65010 2024-Nov-30 17:50 23 38 13.39 -13 32 13.0 166.735559 31.703437 n.a. n.a. 0.986357997849 0.0226487 0.00101823135545 -0.9073519 100.7481 /T 79.1937 106.1/ 0.5058 n.a. n.a. 35.475858 1.1124156 -64.30184 2024-Nov-30 18:00 23 38 13.78 -13 26 15.8 169.556842 32.172173 n.a. n.a. 0.986358083215 0.0209532 0.00101459747501 -0.9024215 100.7856 /T 79.1564 106.1/ 0.4969 n.a. n.a. 35.971893 0.7696282 -63.94730 2024-Nov-30 18:10 23 38 14.04 -13 20 13.6 172.411248 32.554956 n.a. n.a. 0.986358161729 0.0192294 0.00101098346355 -0.8974328 100.8232 /T 79.1190 106.1/ 0.4881 n.a. n.a. 36.473155 0.5127850 -63.58806 2024-Nov-30 18:20 23 38 14.21 -13 14 06.3 175.292783 32.849991 n.a. n.a. 0.986358233274 0.0174768 0.00100738949844 -0.8924139 100.8610 /T 79.0813 106.0/ 0.4792 n.a. n.a. 36.978381 0.3400335 -63.22560 2024-Nov-30 18:30 23 38 14.32 -13 07 54.0 178.194967 33.055889 n.a. n.a. 0.986358297734 0.0156946 0.00100381564463 -0.8873928 100.8993 /T 79.0433 106.0/ 0.4703 n.a. n.a. 37.486529 0.2494031 -62.86129 2024-Nov-30 18:40 t 23 38 14.41 -13 01 36.6 181.110947 33.171694 n.a. n.a. 0.986358354989 0.0138823 0.00100026185377 -0.8823978 100.9380 /T 79.0048 106.0/ 0.4615 n.a. n.a. 37.996786 0.2388339 -62.49639 2024-Nov-30 18:50 e 23 38 14.52 -12 55 14.0 184.033627 33.196910 n.a. n.a. 0.986358404918 0.0120392 0.00099672796350 -0.8774575 100.9773 /T 78.9657 105.9/ 0.4527 n.a. n.a. 38.508565 0.3061967 -62.13209 2024-Nov-30 19:00 23 38 14.68 -12 48 46.3 186.955815 33.131514 n.a. n.a. 0.986358447394 0.0101647 0.00099321369703 -0.8726004 101.0175 /T 78.9257 105.9/ 0.4439 n.a. n.a. 39.021501 0.4493074 -61.76947 2024-Nov-30 19:10 23 38 14.93 -12 42 13.5 189.870366 32.975958 n.a. n.a. 0.986358482291 0.0082581 0.00098971866304 -0.8678551 101.0585 /T 78.8849 105.9/ 0.4351 n.a. n.a. 39.535449 0.6659363 -61.40950 2024-Nov-30 19:20 23 38 15.30 -12 35 35.6 192.770334 32.731158 n.a. n.a. 0.986358509478 0.0063186 0.00098624235572 -0.8632500 101.1005 /T 78.8431 105.8/ 0.4264 n.a. n.a. 40.050482 0.9538114 -61.05310 2024-Nov-30 19:30 23 38 15.83 -12 28 52.6 195.649102 32.398480 n.a. n.a. 0.986358528822 0.0043456 0.00098278415519 -0.8588136 101.1437 /T 78.8001 105.8/ 0.4177 n.a. n.a. 40.566877 1.3106195 -60.70108 2024-Nov-30 19:40 23 38 16.55 -12 22 04.4 198.500508 31.979702 n.a. n.a. 0.986358540187 0.0023382 0.00097934332818 -0.8545739 101.1882 /T 78.7558 105.8/ 0.4091 n.a. n.a. 41.085113 1.7340026 -60.35417 2024-Nov-30 19:50 23 38 17.51 -12 15 11.2 201.318945 31.476985 n.a. n.a. 0.986358543432 0.0002957 0.00097591902892 -0.8505589 101.2341 /T 78.7101 105.7/ 0.4006 n.a. n.a. 41.605858 2.2215531 -60.01302 2024-Nov-30 20:00 23 38 18.74 -12 08 12.9 204.099442 30.892824 n.a. n.a. 0.986358538416 -0.0017827 0.00097251030030 -0.8467962 101.2816 /T 78.6629 105.7/ 0.3921 n.a. n.a. 42.129960 2.7708075 -59.67822 2024-Nov-30 20:10 23 38 20.28 -12 01 09.5 206.837713 30.230004 n.a. n.a. 0.986358524993 -0.0038978 0.00096911607534 -0.8433130 101.3307 /T 78.6139 105.7/ 0.3837 n.a. n.a. 42.658434 3.3792383 -59.35029 2024-Nov-30 20:20 23 38 22.16 -11 54 01.1 209.530188 29.491546 n.a. n.a. 0.986358503014 -0.0060506 0.00096573517885 -0.8401360 101.3817 /T 78.5631 105.6/ 0.3754 n.a. n.a. 43.192448 4.0442466 -59.02967 2024-Nov-30 20:30 23 38 24.41 -11 46 47.7 212.174024 28.680662 n.a. n.a. 0.986358472325 -0.0082418 0.00096236632934 -0.8372915 101.4347 /T 78.5104 105.6/ 0.3672 n.a. n.a. 43.733306 4.7631544 -58.71677 2024-Nov-30 20:40 23 38 27.09 -11 39 29.4 214.767086 27.800702 n.a. n.a. 0.986358432771 -0.0104724 0.00095900814126 -0.8348051 101.4897 /T 78.4555 105.6/ 0.3592 n.a. n.a. 44.282438 5.5331986 -58.41191 2024-Nov-30 20:50 23 38 30.22 -11 32 06.1 217.307918 26.855112 n.a. n.a. 0.986358384191 -0.0127434 0.00095565912738 -0.8327018 101.5470 /T 78.3985 105.5/ 0.3512 n.a. n.a. 44.841377 6.3515256 -58.11541 2024-Nov-30 21:00 23 38 33.83 -11 24 38.0 219.795704 25.847391 n.a. n.a. 0.986358326421 -0.0150557 0.00095231770132 -0.8310060 101.6065 /T 78.3391 105.5/ 0.3433 n.a. n.a. 45.411742 7.2151885 -57.82751 2024-Nov-30 21:10 23 38 37.96 -11 17 05.0 222.230210 24.781054 n.a. n.a. 0.986358259294 -0.0174104 0.00094898218051 -0.8297413 101.6686 /T 78.2773 105.5/ 0.3356 n.a. n.a. 45.995221 8.1211459 -57.54845 2024-Nov-30 21:20 23 38 42.65 -11 09 27.2 224.611732 23.659601 n.a. n.a. 0.986358182638 -0.0198085 0.00094565078919 -0.8289306 101.7332 /T 78.2128 105.5/ 0.3281 n.a. n.a. 46.593551 9.0662642 -57.27841 2024-Nov-30 21:30 23 38 47.93 -11 01 44.7 226.941031 22.486487 n.a. n.a. 0.986358096276 -0.0222510 0.00094232166163 -0.8285958 101.8006 /T 78.1457 105.4/ 0.3206 n.a. n.a. 47.208498 10.047322 -57.01758 2024-Nov-30 21:40 23 38 53.83 -10 53 57.4 229.219275 21.265106 n.a. n.a. 0.986358000027 -0.0247391 0.00093899284547 -0.8287581 101.8707 /T 78.0757 105.4/ 0.3134 n.a. n.a. 47.841834 11.061017 -56.76613 2024-Nov-30 21:50 23 39 00.38 -10 46 05.5 231.447983 19.998768 n.a. n.a. 0.986357893706 -0.0272740 0.00093566230545 -0.8294378 101.9438 /T 78.0028 105.4/ 0.3062 n.a. n.a. 48.495323 12.103979 -56.52419 2024-Nov-30 22:00 23 39 07.62 -10 38 09.0 233.628967 18.690689 n.a. n.a. 0.986357777122 -0.0298569 0.00093232792695 -0.8306541 102.0200 /T 77.9268 105.4/ 0.2993 n.a. n.a. 49.170697 13.172778 -56.29193 2024-Nov-30 22:10 23 39 15.57 -10 30 08.0 235.764278 17.343953 n.a. n.a. 0.986357649616 -0.0327177 0.00092898697913 -0.8326891 102.0993 /T 77.8477 105.4/ 0.2925 n.a. n.a. 49.850851 14.258208 -56.08792 2024-Nov-30 22:20 23 39 24.26 -10 22 02.6 237.856168 15.961541 n.a. n.a. 0.986357510595 -0.0355960 0.00092563677158 -0.8352492 102.1819 /T 77.7654 105.4/ 0.2859 n.a. n.a. 50.558465 15.364130 -55.89100 2024-Nov-30 22:30 23 39 33.72 -10 13 52.8 239.907052 14.546351 n.a. n.a. 0.986357360014 -0.0384804 0.00092227519435 -0.8383374 102.2678 /T 77.6797 105.3/ 0.2795 n.a. n.a. 51.296205 16.487146 -55.70032 2024-Nov-30 22:40 23 39 43.97 -10 05 38.7 241.919473 13.101172 n.a. n.a. 0.986357197865 -0.0413641 0.00091890011483 -0.8419614 102.3571 /T 77.5906 105.3/ 0.2732 n.a. n.a. 52.066314 17.623688 -55.51546 2024-Nov-30 22:50 23 39 55.06 -09 57 20.2 243.896073 11.628684 n.a. n.a. 0.986357024155 -0.0442446 0.00091550936029 -0.8461335 102.4500 /T 77.4978 105.3/ 0.2672 n.a. n.a. 52.870599 18.770087 -55.33636 2024-Nov-30 23:00 23 40 06.99 -09 48 57.4 245.839569 10.131458 n.a. n.a. 0.986356838895 -0.0471237 0.00091210070015 -0.8508701 102.5466 /T 77.4015 105.3/ 0.2613 n.a. n.a. 53.710394 19.922640 -55.16336 2024-Nov-30 23:10 23 40 19.81 -09 40 30.2 247.752733 8.611964 n.a. n.a. 0.986356642081 -0.0500075 0.00090867182967 -0.8561917 102.6470 /T 77.3013 105.3/ 0.2556 n.a. n.a. 54.586553 21.077680 -54.99715 2024-Nov-30 23:20 23 40 33.54 -09 31 58.6 249.638378 7.072572 n.a. n.a. 0.986356433674 -0.0529057 0.00090522035691 -0.8621211 102.7513 /T 77.1973 105.4/ 0.2502 n.a. n.a. 55.499474 22.231641 -54.83871 2024-Nov-30 23:30 23 40 48.19 -09 23 22.6 251.499345 5.515558 n.a. n.a. 0.986356213593 -0.0558308 0.00090174379372 -0.8686831 102.8595 /T 77.0892 105.4/ 0.2450 n.a. n.a. 56.449149 23.381129 -54.68922 2024-Nov-30 23:40 23 41 03.80 -09 14 42.2 253.338497 3.943116 n.a. n.a. 0.986355981700 -0.0587975 0.00089823955196 -0.8759025 102.9718 /T 76.9772 105.4/ 0.2399 n.a. n.a. 57.435234 24.522964 -54.54998 2024-Nov-30 23:50 23 41 20.38 -09 05 57.4 255.158709 2.357357 n.a. n.a. 0.986355737798 -0.0618212 0.00089470494514 -0.8838034 103.0882 /T 76.8609 105.4/ 0.2351 n.a. n.a. 58.457134 25.654217 -54.42227 2024-Dec-01 00:00 23 41 37.96 -08 57 08.1 256.962871 0.760324 n.a. n.a. 0.986355481627 -0.0649172 0.00089113719567 -0.8924069 103.2089 /T 76.7405 105.4/ 0.2305 n.a. n.a. 59.514099 26.772236 -54.30732 $$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. SOLAR PRESENCE (OBSERVING SITE) Time tag is followed by a blank, then a solar-presence condition code: '*' Daylight (refracted solar upper-limb on or above apparent horizon) 'C' Civil twilight/dawn 'N' Nautical twilight/dawn 'A' Astronomical twilight/dawn ' ' Night OR geocentric ephemeris LUNAR PRESENCE WITH TARGET RISE/TRANSIT/SET EVENT MARKER (OBSERVING SITE) The solar-presence code column is immediately followed by another marker: 'm' Refracted upper-limb of Moon on or above apparent horizon ' ' Refracted upper-limb of Moon below apparent horizon OR geocentric The lunar presence marker (an ongoing state) can be over-ridden by a target event marker if an event has occurred since the last output step: 'r' Rise (target body on or went above cut-off RTS elevation) 'e' Elevation max (target body maximum elevation angle has occurred) 't' Transit (target body at or passed through observer meridian) 's' Set (target body on or went below cut-off RTS elevation) RTS MARKERS (TVH) Rise and set are with respect to the reference ellipsoid true visual horizon defined by the elevation cut-off angle. Horizon dip and yellow-light refraction (Earth only) are considered. Accuracy is < or = to twice the requested search step-size. '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} '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 '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 '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 '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 'RA_3sigma DEC_3sigma' = Uncertainty in Right-Ascension and Declination. Output values are the formal +/- 3 standard-deviations (sigmas) around nominal position. Units: ARCSECONDS '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 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 ***************************************************************************************************************************************************************************************************************************************************