******************************************************************************* JPL/HORIZONS 488453 (1994 XD) 2024-May-04 23:15:48 Rec #: 488453 (+COV) Soln.date: 2024-Jan-21_12:22:16 # obs: 658 (1994-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457525.5 ! 2016-May-17.00 (TDB) Residual RMS= .27485 EC= .7342613306611557 QR= .6234049301756345 TP= 2457528.0878637731 OM= 96.1889491647669 W= 249.3878214117212 IN= 4.311581738359783 A= 2.345932309086446 MA= 359.2901407104551 ADIST= 4.068459687997258 PER= 3.5932 N= .274303191 ANGMOM= .017886437 DAN= 1.45803 DDN= .85908 L= 345.5232088 B= -4.0351017 MOID= .0202954 TP= 2016-May-19.5878637731 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= 2.7365 H= 19.24 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. Asteroid non-gravitational force model (AMRAT= m^2/kg;A1,A2,A3=au/d^2;R0=au): AMRAT= 0. A1= 0. A2= 2.193382670157E-14 A3= 0. Non-standard or simulated/proxy model: ALN= 1. NK= 0. NM= 2. NN= 5.093 R0= 1. ASTEROID comments: 1: soln ref.= JPL#110, PHA OCC=0 radar(11 delay, 5 Dop.) 2: source=ORB; Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sat May 4 23:15:48 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 488453 (1994 XD) {source: JPL#110} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2023-Jun-08 00:00:00.0000 UT Stop time : A.D. 2023-Jun-13 00:00:00.0000 UT Step-size : 120 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 : Sun 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 Small-body perts: Yes {source: SB441-N16} Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Calendar mode : Mixed Julian/Gregorian EOP file : eop.240503.p240727 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-03. PREDICTS-> 2024-JUL-26 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 ) ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2457525.5 ! 2016-May-17.00 (TDB) Residual RMS= .27485 EC= .7342613306611557 QR= .6234049301756345 TP= 2457528.0878637731 OM= 96.1889491647669 W= 249.3878214117212 IN= 4.311581738359783 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 5.812619839595292E-01 Y=-1.913283468215937E-01 Z=-1.284298438080198E-01 VX= 8.984062923691161E-03 VY= 2.529462190394382E-02 VZ= 9.991797002218927E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= 2.7365 H= 19.24 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. Asteroid non-gravitational force model (AMRAT= m^2/kg;A1,A2,A3=au/d^2;R0=au): AMRAT= 0. A1= 0. A2= 2.193382670157E-14 A3= 0. Non-standard or simulated/proxy model: ALN= 1. NK= 0. NM= 2. NN= 5.093 R0= 1. ********************************************************************************************************************************* Date__(UT)__HR:MN R.A._____(ICRF)_____DEC APmag S-brt delta deldot S-O-T /r T-O-M/MN_Illu% Cnst ********************************************************************************************************************************* $$SOE 2023-Jun-08 00:00 17 44 21.10 +05 15 38.0 14.302 n.a. 0.05435938807012 -19.8389333 150.1223 /L 53.7/ 80.4958 Oph 2023-Jun-08 02:00 17 45 00.52 +05 39 46.0 14.274 n.a. 0.05340610214935 -19.7722189 149.7101 /L 54.7/ 79.7104 Oph 2023-Jun-08 04:00 17 45 41.42 +06 04 45.9 14.245 n.a. 0.05245610872174 -19.7020941 149.2823 /L 55.7/ 78.9140 Oph 2023-Jun-08 06:00 17 46 23.88 +06 30 40.4 14.217 n.a. 0.05150957777587 -19.6283135 148.8379 /L 56.6/ 78.1070 Oph 2023-Jun-08 08:00 17 47 07.99 +06 57 32.3 14.188 n.a. 0.05056669160182 -19.5506111 148.3763 /L 57.6/ 77.2897 Oph 2023-Jun-08 10:00 17 47 53.84 +07 25 24.6 14.159 n.a. 0.04962764583389 -19.4686982 147.8963 /L 58.6/ 76.4626 Oph 2023-Jun-08 12:00 17 48 41.55 +07 54 20.5 14.130 n.a. 0.04869265059272 -19.3822612 147.3972 /L 59.6/ 75.6260 Oph 2023-Jun-08 14:00 17 49 31.22 +08 24 23.4 14.101 n.a. 0.04776193173596 -19.2909593 146.8779 /L 60.5/ 74.7802 Oph 2023-Jun-08 16:00 17 50 22.99 +08 55 36.8 14.072 n.a. 0.04683573222863 -19.1944220 146.3372 /L 61.5/ 73.9257 Oph 2023-Jun-08 18:00 17 51 16.98 +09 28 04.7 14.043 n.a. 0.04591431364454 -19.0922462 145.7741 /L 62.4/ 73.0628 Oph 2023-Jun-08 20:00 17 52 13.35 +10 01 51.1 14.014 n.a. 0.04499795781119 -18.9839928 145.1872 /L 63.3/ 72.1920 Oph 2023-Jun-08 22:00 17 53 12.24 +10 37 00.4 13.985 n.a. 0.04408696861184 -18.8691839 144.5753 /L 64.3/ 71.3135 Oph 2023-Jun-09 00:00 17 54 13.83 +11 13 37.2 13.956 n.a. 0.04318167395865 -18.7472984 143.9369 /L 65.2/ 70.4279 Oph 2023-Jun-09 02:00 17 55 18.32 +11 51 46.3 13.927 n.a. 0.04228242795226 -18.6177685 143.2705 /L 66.1/ 69.5354 Oph 2023-Jun-09 04:00 17 56 25.90 +12 31 33.2 13.898 n.a. 0.04138961324310 -18.4799749 142.5746 /L 67.0/ 68.6364 Oph 2023-Jun-09 06:00 17 57 36.81 +13 13 03.2 13.870 n.a. 0.04050364361070 -18.3332426 141.8474 /L 67.9/ 67.7315 Oph 2023-Jun-09 08:00 17 58 51.29 +13 56 22.2 13.841 n.a. 0.03962496677670 -18.1768355 141.0870 /L 68.7/ 66.8208 Oph 2023-Jun-09 10:00 18 00 09.61 +14 41 36.6 13.813 n.a. 0.03875406746684 -18.0099511 140.2916 /L 69.6/ 65.9049 Her 2023-Jun-09 12:00 18 01 32.08 +15 28 52.9 13.786 n.a. 0.03789147073618 -17.8317151 139.4591 /L 70.4/ 64.9841 Her 2023-Jun-09 14:00 18 02 59.03 +16 18 18.0 13.758 n.a. 0.03703774556874 -17.6411755 138.5873 /L 71.2/ 64.0588 Her 2023-Jun-09 16:00 18 04 30.83 +17 09 59.3 13.732 n.a. 0.03619350875988 -17.4372967 137.6738 /L 72.0/ 63.1294 Her 2023-Jun-09 18:00 18 06 07.88 +18 04 04.4 13.706 n.a. 0.03535942908363 -17.2189534 136.7162 /L 72.8/ 62.1962 Her 2023-Jun-09 20:00 18 07 50.65 +19 00 41.5 13.681 n.a. 0.03453623173938 -16.9849252 135.7119 /L 73.5/ 61.2597 Her 2023-Jun-09 22:00 18 09 39.65 +19 59 58.9 13.656 n.a. 0.03372470306227 -16.7338913 134.6582 /L 74.2/ 60.3202 Her 2023-Jun-10 00:00 18 11 35.43 +21 02 05.2 13.633 n.a. 0.03292569546644 -16.4644261 133.5522 /L 74.9/ 59.3782 Her 2023-Jun-10 02:00 18 13 38.65 +22 07 09.4 13.611 n.a. 0.03214013257157 -16.1749958 132.3909 /L 75.6/ 58.4339 Her 2023-Jun-10 04:00 18 15 50.02 +23 15 20.5 13.591 n.a. 0.03136901443901 -15.8639577 131.1712 /L 76.2/ 57.4877 Her 2023-Jun-10 06:00 18 18 10.35 +24 26 47.6 13.572 n.a. 0.03061342281239 -15.5295606 129.8899 /L 76.8/ 56.5401 Her 2023-Jun-10 08:00 18 20 40.56 +25 41 39.8 13.554 n.a. 0.02987452621895 -15.1699504 128.5438 /L 77.3/ 55.5914 Her 2023-Jun-10 10:00 18 23 21.70 +27 00 05.9 13.539 n.a. 0.02915358474124 -14.7831785 127.1295 /L 77.8/ 54.6420 Her 2023-Jun-10 12:00 18 26 14.95 +28 22 14.2 13.527 n.a. 0.02845195421274 -14.3672174 125.6437 /L 78.2/ 53.6922 Her 2023-Jun-10 14:00 18 29 21.68 +29 48 12.2 13.517 n.a. 0.02777108952599 -13.9199823 124.0831 /L 78.6/ 52.7424 Lyr 2023-Jun-10 16:00 18 32 43.45 +31 18 06.4 13.510 n.a. 0.02711254667071 -13.4393625 122.4448 /L 79.0/ 51.7929 Lyr 2023-Jun-10 18:00 18 36 22.05 +32 52 01.8 13.507 n.a. 0.02647798304169 -12.9232621 120.7256 /L 79.2/ 50.8442 Lyr 2023-Jun-10 20:00 18 40 19.57 +34 30 01.1 13.507 n.a. 0.02586915548083 -12.3696536 118.9231 /L 79.4/ 49.8965 Lyr 2023-Jun-10 22:00 18 44 38.40 +36 12 04.8 13.512 n.a. 0.02528791544980 -11.7766442 117.0351 /L 79.6/ 48.9502 Lyr 2023-Jun-11 00:00 18 49 21.35 +37 58 09.6 13.522 n.a. 0.02473620068220 -11.1425552 115.0599 /L 79.6/ 48.0057 Lyr 2023-Jun-11 02:00 18 54 31.69 +39 48 08.3 13.537 n.a. 0.02421602265118 -10.4660166 112.9966 /L 79.6/ 47.0632 Lyr 2023-Jun-11 04:00 19 00 13.21 +41 41 48.7 13.558 n.a. 0.02372944922932 -9.7460721 110.8452 /L 79.5/ 46.1232 Lyr 2023-Jun-11 06:00 19 06 30.40 +43 38 52.2 13.585 n.a. 0.02327858203096 -8.9822939 108.6066 /L 79.3/ 45.1859 Lyr 2023-Jun-11 08:00 19 13 28.49 +45 38 53.4 13.620 n.a. 0.02286552813359 -8.1749008 106.2829 /L 79.0/ 44.2517 Lyr 2023-Jun-11 10:00 19 21 13.59 +47 41 18.2 13.662 n.a. 0.02249236618610 -7.3248720 103.8776 /L 78.7/ 43.3209 Cyg 2023-Jun-11 12:00 19 29 52.85 +49 45 23.1 13.713 n.a. 0.02216110733032 -6.4340468 101.3955 /L 78.2/ 42.3939 Cyg 2023-Jun-11 14:00 19 39 34.56 +51 50 13.6 13.773 n.a. 0.02187365187218 -5.5051998 98.8429 /L 77.7/ 41.4709 Cyg 2023-Jun-11 16:00 19 50 28.21 +53 54 43.4 13.842 n.a. 0.02163174320024 -4.5420782 96.2277 /L 77.0/ 40.5523 Cyg 2023-Jun-11 18:00 20 02 44.47 +55 57 32.7 13.921 n.a. 0.02143692099934 -3.5493922 93.5592 /L 76.3/ 39.6383 Cyg 2023-Jun-11 20:00 20 16 34.93 +57 57 08.0 14.010 n.a. 0.02129047626083 -2.5327493 90.8482 /L 75.4/ 38.7293 Cyg 2023-Jun-11 22:00 20 32 11.60 +59 51 41.6 14.110 n.a. 0.02119341085768 -1.4985301 88.1062 /L 74.5/ 37.8256 Cyg 2023-Jun-12 00:00 20 49 45.71 +61 39 12.2 14.221 n.a. 0.02114640445140 -0.4537090 85.3461 /L 73.6/ 36.9274 Cep 2023-Jun-12 02:00 21 09 25.97 +63 17 27.3 14.343 n.a. 0.02114979118058 0.5943704 82.5809 /L 72.5/ 36.0351 Cep 2023-Jun-12 04:00 21 31 15.83 +64 44 08.8 14.476 n.a. 0.02120354795225 1.6382502 79.8240 /L 71.4/ 35.1490 Cep 2023-Jun-12 06:00 21 55 10.22 +65 57 01.4 14.620 n.a. 0.02130729527930 2.6706209 77.0884 /L 70.2/ 34.2692 Cep 2023-Jun-12 08:00 22 20 52.47 +66 54 05.7 14.774 n.a. 0.02146031059591 3.6845736 74.3868 /L 69.0/ 33.3962 Cep 2023-Jun-12 10:00 22 47 52.81 +67 33 54.2 14.938 n.a. 0.02166155298044 4.6738193 71.7308 /L 67.8/ 32.5302 Cep 2023-Jun-12 12:00 23 15 30.11 +67 55 46.2 15.111 n.a. 0.02190969736548 5.6328617 69.1308 /L 66.5/ 31.6713 Cep 2023-Jun-12 14:00 23 42 57.25 +67 59 57.0 15.293 n.a. 0.02220317572446 6.5571135 66.5960 /L 65.2/ 30.8200 Cep 2023-Jun-12 16:00 00 09 28.82 +67 47 36.8 15.484 n.a. 0.02254022245065 7.4429543 64.1340 /L 63.9/ 29.9765 Cep 2023-Jun-12 18:00 00 34 28.06 +67 20 39.4 15.682 n.a. 0.02291892118166 8.2877341 61.7511 /L 62.6/ 29.1409 Cas 2023-Jun-12 20:00 00 57 30.78 +66 41 24.2 15.886 n.a. 0.02333725061935 9.0897301 59.4517 /L 61.3/ 28.3136 Cas 2023-Jun-12 22:00 01 18 25.55 +65 52 18.3 16. n.a. 0.02379312736728 9.8480676 57.2394 /L 59.9/ 27.4948 Cas 2023-Jun-13 00:00 01 37 11.35 +64 55 42.2 16. n.a. 0.02428444436269 10.5626179 55.1158 /L 58.6/ 26.6848 Cas $$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} 'APmag S-brt' = The asteroids' approximate apparent airless visual magnitude and surface brightness using the standard IAU H-G system magnitude model: APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi_1 + G*phi_2) For solar phase angles >90 deg, the error could exceed 1 magnitude. For phase angles >120 degrees, output values are rounded to the nearest integer to indicate error could be large and unknown. 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 '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 '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 '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. 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 = '1994 XD' START_TIME = '2023-06-08' STOP_TIME = '2023-06-13' STEP_SIZE = '2 hours' QUANTITIES = '1,9,20,23,25,29'