496816 (1989 UP)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4722721906 ± 7.57e-09
Semi-major axis (a)1.8613993311 AU ± 6.23e-10
Inclination (i)3.85484022° ± 1.42e-06
Long. of Asc. Node (Ω)53.15019247° ± 9.16e-06
Arg. of Perihelion (ω)17.83613492° ± 9.63e-06
Mean Anomaly (M)51.74610026° ± 1.41e-06
Mean Motion (n)0.3881083137°/day ± 1.95e-10
Perihelion dist (q)0.98231219 AU ± 1.41e-08
Aphelion dist (Q)2.74048647 AU ± 1.41e-08
Orbital Period2.53956498 yr ± 1.28e-09
Physical Parameters
H (abs. magnitude)20.54
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.241″
Uncertainty0
Orbit TypeApollo
MOID0.004870 AU
Observations Used326
Radar Obs Used1
Oppositions17
Arc Total1989-2023
First Observation Used1989-10-27
Last Observation Used2023-02-13
Observations (383)
Date Type RA Dec Mag Band Observatory
1989-10-27 08:34:41 A 04 17 17.94 -00 10 33.4 D 691
1989-10-27 10:43:56 A 04 18 33.64 -00 04 55.8 D 691
1989-10-27 12:09:46 A 04 19 24.70 -00 01 09.0 D 691
1989-10-27 12:46:29 A 04 19 46.59 +00 00 27.1 D 691
1989-10-27 16:50:00 A 04 22 25.74 +00 13 53.6 413
1989-10-27 16:52:54 A 04 22 27.53 +00 14 01.6 413
1989-10-27 16:56:59 A 04 22 29.97 +00 14 12.7 413
1989-10-28 07:07:21 A 04 31 53.24 +00 51 01.7 D 691
1989-10-28 07:21:35 A 04 32 02.39 +00 51 42.7 D 691
1989-10-28 07:32:50 A 04 32 09.57 +00 52 14.7 D 691
1989-10-28 08:01:37 A 04 32 27.98 +00 53 37.6 D 691
1989-10-28 08:22:55 A 04 32 41.48 +00 54 38.0 D 691
1989-10-28 08:33:45 A 04 32 48.39 +00 55 09.5 D 691
1989-10-28 10:30:44 A 04 34 04.31 +01 00 45.9 675
1989-10-28 11:21:59 A 04 34 36.21 +01 03 09.7 675
1989-10-28 18:13:52 A 04 39 19.33 +01 26 08.0 413
1989-10-29 07:33:16 A 04 48 57.55 +02 04 01.3 D 691
1989-10-29 07:52:57 A 04 49 11.16 +02 05 02.6 D 691
1989-10-29 09:06:40 A 04 50 02.21 +02 08 53.4 D 691
1989-10-30 11:11:44 A 05 09 46.95 +03 33 30.7 675
1989-10-30 12:00:00 A 05 10 23.33 +03 36 11.5 675
1989-10-30 12:23:28 A 05 10 40.43 +03 37 35.6 D 691
1989-11-01 08:15:06 A 05 47 20.10 +06 09 39.3 657
1989-11-01 08:32:05 A 05 47 34.40 +06 10 43.7 657
1989-11-01 17:43:29 A 05 55 30.43 +06 47 15.9 413
1989-11-01 17:46:30 A 05 55 32.74 +06 47 23.7 413
1989-11-02 09:08:05 A 06 09 17.60 +07 38 06.7 657
1989-11-02 09:59:59 A 06 10 01.94 +07 41 56.9 D 691
1989-11-02 10:38:49 A 06 10 34.94 +07 44 14.1 D 691
1989-11-03 08:39:59 A 06 30 33.07 +09 00 27.8 D 691
1989-11-03 09:28:39 A 06 31 15.44 +09 03 15.4 D 691
1989-11-03 14:41:38 A 06 35 58.77 +09 24 20.1 474
1989-11-03 15:07:07 A 06 36 21.09 +09 25 47.7 474
1989-11-04 15:25:07 A 06 58 19.47 +10 44 04.5 474
1989-11-04 15:45:23 A 06 58 37.11 +10 45 07.5 474
1989-11-19 10:46:52 A 10 24 01.45 +17 07 38.3 C 698
1989-11-19 10:53:32 A 10 24 03.27 +17 07 39.0 C 698
1989-12-01 11:02:42 A 11 19 55.79 +16 42 32.1 D 691
1989-12-01 11:40:50 A 11 20 00.01 +16 42 29.4 D 691
1989-12-01 12:01:09 A 11 20 02.35 +16 42 27.3 D 691
1989-12-05 11:11:48 A 11 31 01.48 +16 30 22.7 D 691
1989-12-05 11:46:06 A 11 31 04.72 +16 30 19.4 D 691
1989-12-05 12:17:23 A 11 31 07.47 +16 30 16.6 D 691
1989-12-23 09:54:48 A 12 00 16.40 +15 57 35.0 D 691
1989-12-23 10:49:27 A 12 00 18.06 +15 57 36.5 D 691
1989-12-23 11:23:39 A 12 00 19.03 +15 57 37.2 D 691
1989-12-23 13:03:13 A 12 00 21.88 +15 57 38.3 D 691
1990-01-01 09:51:55 A 12 05 46.53 +16 08 06.2 D 691
1990-01-01 10:24:04 A 12 05 46.65 +16 08 10.3 D 691
1990-01-01 10:40:36 A 12 05 46.73 +16 08 12.2 D 691
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2017-10-31 08:00:00 114597.914 1 Hz 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)