89136 (2001 US16)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2527917081 ± 2.00e+00
Semi-major axis (a)1.3559247666 AU ± 3.00e+00
Inclination (i)1.90586628° ± 4.00e+00
Long. of Asc. Node (Ω)175.89512420° ± 5.00e+00
Arg. of Perihelion (ω)67.20134426° ± 6.00e+00
Mean Anomaly (M)222.31602461° ± 6.22e-06
Mean Motion (n)0.6242504816°/day ± 2.07e+00
Perihelion dist (q)1.01315823 AU ± 3.52e+00
Aphelion dist (Q)1.69869130 AU ± 4.63e+00
Orbital Period1.57889551 yr ± 5.24e+00
NGA Modelr2
A23.46177527e-06 AU/d²
Physical Parameters
H (abs. magnitude)20.27
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-27
RMS Residual0.374″
Uncertainty0
Orbit TypeApollo
MOID0.028467 AU
Observations Used1359
Oppositions9
Arc Total2001-2026
First Observation Used2001-10-18
Last Observation Used2026-01-13
Observations (1410)
Date Type RA Dec Mag Band Observatory
2004-05-03 05:29:46 C 14 41 15.72 +39 45 39.3 r H41
2004-05-03 05:31:07 C 14 41 16.62 +39 45 46.3 r H41
2004-05-04 06:29:38 C 15 01 05.43 +41 51 06.8 r H41
2004-05-04 06:30:44 C 15 01 06.26 +41 51 11.9 r H41
2004-05-04 06:31:59 C 15 01 07.21 +41 51 18.0 r H41
2004-05-04 06:33:10 C 15 01 08.08 +41 51 23.8 r H41
2004-05-04 06:34:20 C 15 01 08.98 +41 51 29.3 r H41
2004-05-05 05:46:50 C 15 21 57.13 +43 39 46.1 r H41
2004-05-05 05:49:17 C 15 21 59.16 +43 39 57.2 r H41
2004-05-05 05:51:06 C 15 22 00.70 +43 40 05.6 r H41
2004-05-05 05:52:20 C 15 22 01.78 +43 40 11.4 r H41
2004-05-05 05:53:39 C 15 22 02.90 +43 40 17.5 r H41
2004-05-05 16:26:43 C 15 32 01.47 +44 25 48.2 300
2004-05-05 16:30:19 C 15 32 04.65 +44 26 02.5 300
2004-05-05 16:32:07 C 15 32 06.22 +44 26 09.8 300
2004-05-05 16:35:45 C 15 32 09.46 +44 26 24.5 300
2004-05-05 16:40:54 C 15 32 14.00 +44 26 44.7 300
2004-05-05 16:44:37 C 15 32 17.27 +44 26 59.9 300
2004-05-05 16:48:13 C 15 32 20.47 +44 27 14.0 300
2004-05-06 06:05:45 C 15 45 55.13 +45 20 05.2 r H41
2004-05-06 06:07:06 C 15 45 56.39 +45 20 10.6 r H41
2004-05-06 06:08:21 C 15 45 57.53 +45 20 15.4 r H41
2004-05-06 06:10:01 C 15 45 59.07 +45 20 21.9 r H41
2004-05-06 06:11:07 C 15 46 00.14 +45 20 26.4 r H41
2004-05-06 06:12:11 C 15 46 01.10 +45 20 30.3 r H41
2004-05-06 12:00:31 C 15 52 18.84 +45 40 41.6 m 379
2004-05-06 12:01:41 C 15 52 20.03 +45 40 45.8 m 379
2004-05-06 12:05:07 C 15 52 23.41 +45 41 00.1 m 379
2004-05-06 12:06:16 C 15 52 24.56 +45 41 05.6 m 379
2004-05-06 12:07:25 C 15 52 25.72 +45 41 10.5 m 379
2004-05-06 12:10:41 C 15 52 28.87 +45 41 23.9 m 379
2004-05-06 12:16:26 C 15 52 34.60 +45 41 48.0 m 379
2004-05-07 05:53:32 C 16 11 27.79 +46 40 09.8 c H41
2004-05-07 05:55:00 C 16 11 29.39 +46 40 14.2 c H41
2004-05-07 05:56:18 C 16 11 30.71 +46 40 18.4 c H41
2004-05-07 05:57:32 C 16 11 31.94 +46 40 22.3 c H41
2004-05-07 05:59:28 C 16 11 33.88 +46 40 28.5 c H41
2004-05-07 18:04:07 C 16 24 48.14 +47 12 45.2 m 379
2004-05-07 18:05:47 C 16 24 49.80 +47 12 48.8 m 379
2004-05-07 18:09:05 C 16 24 53.21 +47 12 55.3 m 379
2004-05-07 18:12:23 C 16 24 56.77 +47 13 01.5 m 379
2004-05-07 22:09:18 C 16 29 45.08 +47 20 23.0 o 084
2004-05-08 08:05:09 C 16 41 07.40 +47 42 54.4 c H41
2004-05-08 08:08:19 C 16 41 10.80 +47 43 00.4 c H41
2004-05-08 08:10:15 C 16 41 12.80 +47 43 03.6 c H41
2004-05-08 08:11:19 C 16 41 13.98 +47 43 05.7 c H41
2004-05-08 08:14:47 C 16 41 17.60 +47 43 11.6 c H41
2004-05-08 22:33:08 C 16 58 13.10 +48 02 06.9 o 084
2004-05-08 22:35:02 C 16 58 15.22 +48 02 09.4 o 084
2004-05-08 22:36:09 C 16 58 16.49 +48 02 10.9 o 084
Radar Observations (4)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2004-04-28 03:00:00 37745971.83 1 us 2380 -1 -1
2004-04-28 03:00:00 44360.4701 0.2 Hz 2380 -1 -1
2004-04-29 03:22:00 36194545.1 1 us 2380 -1 -1
2004-04-29 03:22:00 41214.5742 0.1 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)