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
2017-10-25 10:06:44 C 04 10 53.79 +00 26 16.7 q H45
2017-10-25 10:07:45 C 04 10 54.32 +00 26 19.1 q H45
2017-10-25 10:08:44 C 04 10 54.83 +00 26 21.0 q H45
2017-10-25 10:09:40 C 04 10 55.33 +00 26 23.4 q H45
2017-10-26 01:33:04 C 04 19 34.26 +01 02 01.0 U 160
2017-10-26 01:35:10 C 04 19 35.41 +01 02 06.2 U 160
2017-10-26 01:37:15 C 04 19 36.54 +01 02 11.1 U 160
2017-10-26 10:05:28 C 04 24 31.65 +01 23 11.1 U 703
2017-10-26 10:21:09 C 04 24 40.20 +01 23 51.4 U 703
2017-10-26 10:29:00 C 04 24 44.59 +01 24 10.9 U 703
2017-10-27 11:29:49 C 04 40 12.577 +02 29 28.91 L F51
2017-10-27 23:01:34 C 04 47 45.12 +03 00 07.2 U J69
2017-10-27 23:09:58 C 04 47 50.55 +03 00 30.6 U J69
2017-10-27 23:18:21 C 04 47 55.95 +03 00 54.1 U J69
2017-10-28 00:11:39 C 04 48 29.09 +03 03 32.9 q 595
2017-10-28 00:15:58 C 04 48 31.84 +03 03 45.1 q 595
2017-10-28 00:20:17 C 04 48 34.59 +03 03 57.4 q 595
2017-10-28 01:47:07 C 04 49 30.32 +03 08 05.5 U 160
2017-10-28 01:49:11 C 04 49 31.64 +03 08 11.1 U 160
2017-10-28 01:51:14 C 04 49 32.93 +03 08 16.8 U 160
2017-10-28 11:29:38 C 04 56 08.33 +03 36 37.5 T05
2017-10-28 11:40:53 C 04 56 15.65 +03 37 10.2 T05
2017-10-28 11:51:37 C 04 56 22.61 +03 37 41.3 T05
2017-10-28 12:02:23 C 04 56 29.61 +03 38 12.5 T05
2017-10-29 10:07:19 C 05 12 06.12 +04 43 15.8 U 703
2017-10-29 10:18:39 C 05 12 13.88 +04 43 49.5 U 703
2017-10-29 10:26:00 C 05 12 19.06 +04 44 12.4 U 703
2017-10-29 10:33:23 C 05 12 24.17 +04 44 34.8 U 703
2017-10-30 00:25:06 C 05 22 45.75 +05 26 25.7 U Z80
2017-10-30 00:26:51 C 05 22 47.04 +05 26 31.1 U Z80
2017-10-30 00:28:36 C 05 22 48.31 +05 26 36.7 U Z80
2017-10-30 00:30:20 C 05 22 49.61 +05 26 42.0 U Z80
2017-10-30 00:32:05 C 05 22 50.86 +05 26 47.3 U Z80
2017-10-30 00:33:50 C 05 22 52.15 +05 26 52.8 U Z80
2017-10-30 00:35:34 C 05 22 53.41 +05 26 58.3 U Z80
2017-10-30 00:37:19 C 05 22 54.70 +05 27 03.9 U Z80
2017-10-30 00:39:03 C 05 22 55.96 +05 27 09.3 U Z80
2017-10-30 10:21:04 C 05 30 13.00 +05 57 59.7 q H45
2017-10-30 10:22:09 C 05 30 13.80 +05 58 03.1 q H45
2017-10-30 10:23:00 C 05 30 14.42 +05 58 05.7 q H45
2017-10-30 10:23:51 C 05 30 15.05 +05 58 08.5 q H45
2017-10-30 10:24:42 C 05 30 15.68 +05 58 11.1 q H45
2017-10-30 10:25:32 C 05 30 16.28 +05 58 13.7 q H45
2017-10-30 11:18:38 C 05 31 04.85 +06 01 37.9 T08
2017-10-30 11:28:59 C 05 31 12.45 +06 02 10.8 T08
2017-10-30 11:39:14 C 05 31 19.98 +06 02 43.0 T08
2017-10-30 11:49:24 C 05 31 27.42 +06 03 15.3 T08
2017-10-31 13:34:11 C 05 51 43.17 +07 24 40.9 T08
2017-10-31 13:56:37 C 05 52 00.29 +07 25 51.9 T08
2017-10-31 13:58:02 C 05 52 01.36 +07 25 56.2 T08
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)