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
2004-04-16 21:04:02 C 12 34 47.43 +13 59 50.3 r 557
2004-04-16 21:06:27 C 12 34 48.53 +14 00 00.4 185
2004-04-16 21:08:17 C 12 34 48.68 +14 00 05.0 185
2004-04-16 21:11:32 C 12 34 48.95 +14 00 13.1 185
2004-04-16 21:15:50 C 12 34 49.32 +14 00 23.5 185
2004-04-16 21:33:36 C 12 34 49.90 +14 01 01.9 r 557
2004-04-16 21:51:02 C 12 34 50.00 +14 01 24.7 o 084
2004-04-16 22:05:02 C 12 34 52.54 +14 02 17.8 r 557
2004-04-16 22:34:34 C 12 34 55.02 +14 03 28.8 r 557
2004-04-16 23:00:28 C 12 34 57.21 +14 04 30.8 r 557
2004-04-16 23:33:42 C 12 35 00.08 +14 05 50.1 r 557
2004-04-17 00:04:26 C 12 35 02.78 +14 07 03.0 r 557
2004-04-17 00:33:59 C 12 35 05.44 +14 08 12.9 r 557
2004-04-17 01:03:31 C 12 35 08.19 +14 09 22.6 r 557
2004-04-17 01:33:04 C 12 35 11.02 +14 10 32.3 r 557
2004-04-17 02:04:29 C 12 35 14.13 +14 11 45.8 r 557
2004-04-17 13:25:01 C 12 36 40.20 +14 40 34.6 r 379
2004-04-17 13:29:20 C 12 36 40.54 +14 40 45.1 r 379
2004-04-17 13:31:28 C 12 36 40.67 +14 40 50.7 r 379
2004-04-17 13:33:37 C 12 36 40.88 +14 40 55.8 r 379
2004-04-17 13:35:47 C 12 36 41.05 +14 41 01.2 r 379
2004-04-17 13:40:04 C 12 36 41.43 +14 41 12.5 r 379
2004-04-17 14:29:28 C 12 36 45.50 +14 43 15.5 r 379
2004-04-17 14:33:45 C 12 36 45.89 +14 43 26.0 r 379
2004-04-17 14:35:55 C 12 36 46.03 +14 43 31.4 r 379
2004-04-17 14:40:12 C 12 36 46.43 +14 43 41.6 r 379
2004-04-17 14:42:21 C 12 36 46.57 +14 43 47.2 r 379
2004-04-17 19:35:57 C 12 37 28.37 +14 55 30.5 r 557
2004-04-17 20:05:55 C 12 37 31.30 +14 56 48.5 r 557
2004-04-17 20:35:54 C 12 37 34.19 +14 58 06.1 r 557
2004-04-17 21:05:53 C 12 37 37.05 +14 59 23.4 r 557
2004-04-17 21:29:23 C 12 37 37.74 +15 00 03.3 o 084
2004-04-17 21:35:53 C 12 37 39.88 +15 00 40.3 r 557
2004-04-17 22:05:54 C 12 37 42.72 +15 01 57.2 r 557
2004-04-17 22:35:22 C 12 37 45.51 +15 03 12.2 r 557
2004-04-17 23:05:42 C 12 37 48.43 +15 04 29.0 r 557
2004-04-17 23:37:26 C 12 37 51.51 +15 05 49.0 r 557
2004-04-18 00:09:12 C 12 37 54.67 +15 07 08.8 r 557
2004-04-18 00:35:40 C 12 37 57.37 +15 08 15.1 r 557
2004-04-18 01:05:40 C 12 38 00.50 +15 09 29.9 r 557
2004-04-18 01:36:31 C 12 38 03.82 +15 10 46.7 r 557
2004-04-18 02:06:30 C 12 38 07.15 +15 12 01.1 r 557
2004-04-18 02:09:25 C 12 38 18.76 +15 13 15.0 14.2 d H72
2004-04-18 02:11:43 C 12 38 18.98 +15 13 21.0 14.4 d H72
2004-04-18 02:14:00 C 12 38 19.15 +15 13 26.9 14.5 d H72
2004-04-18 02:16:16 C 12 38 19.39 +15 13 32.9 14.7 d H72
2004-04-18 03:59:12 C 12 38 28.36 +15 18 04.5 14.8 d H72
2004-04-18 04:01:30 C 12 38 28.63 +15 18 10.5 15.0 d H72
2004-04-18 04:03:46 C 12 38 28.80 +15 18 16.4 13.8 d H72
2004-04-18 04:06:04 C 12 38 29.00 +15 18 22.5 14.1 d H72
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)