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
2004-05-09 07:03:15 C 17 08 24.10 +48 12 11.0 15.5 c 704
2004-05-09 07:17:01 C 17 08 39.07 +48 12 26.5 15.7 c 704
2004-05-09 07:29:49 C 17 08 47.03 +48 12 47.2 c H41
2004-05-09 07:30:45 C 17 08 53.97 +48 12 41.6 15.6 c 704
2004-05-09 07:31:27 C 17 08 48.75 +48 12 48.7 c H41
2004-05-09 07:33:53 C 17 08 51.38 +48 12 50.5 c H41
2004-05-09 07:35:17 C 17 08 52.82 +48 12 51.7 c H41
2004-05-09 07:36:52 C 17 08 54.56 +48 12 53.1 c H41
2004-05-09 07:39:02 C 17 08 56.98 +48 12 54.6 c H41
2004-05-09 07:44:26 C 17 09 08.74 +48 12 55.6 15.6 c 704
2004-05-09 21:16:45 C 17 25 10.26 +48 15 44.8 o 084
2004-05-09 21:17:52 C 17 25 11.50 +48 15 45.6 o 084
2004-05-10 07:02:41 C 17 36 36.58 +48 16 54.8 c H41
2004-05-10 07:06:46 C 17 36 40.95 +48 16 54.7 c H41
2004-05-10 07:08:08 C 17 36 42.41 +48 16 54.4 c H41
2004-05-10 07:09:27 C 17 36 43.82 +48 16 54.3 c H41
2004-05-10 07:10:49 C 17 36 45.26 +48 16 54.4 c H41
2004-05-10 22:06:15 C 17 54 07.88 +48 04 27.6 o A16
2004-05-10 22:10:18 C 17 54 12.37 +48 04 25.6 o A16
2004-05-10 22:14:19 C 17 54 16.72 +48 04 23.8 o A16
2004-05-10 22:18:04 C 17 54 20.84 +48 04 22.4 o A16
2004-05-10 22:22:19 C 17 54 25.48 +48 04 19.9 o A16
2004-05-11 05:08:56 C 18 02 08.44 +47 57 15.5 c H41
2004-05-11 05:13:56 C 18 02 13.79 +47 57 12.1 c H41
2004-05-11 05:15:29 C 18 02 15.42 +47 57 11.4 c H41
2004-05-11 05:16:35 C 18 02 16.56 +47 57 10.5 c H41
2004-05-11 05:17:38 C 18 02 17.71 +47 57 09.8 c H41
2004-05-11 17:45:09 C 18 15 44.08 +47 39 12.4 m 379
2004-05-11 17:50:05 C 18 15 48.88 +47 39 03.0 m 379
2004-05-11 17:55:39 C 18 15 54.38 +47 38 53.4 m 379
2004-05-11 18:02:15 C 18 16 00.79 +47 38 41.2 m 379
2004-05-11 18:03:55 C 18 16 02.47 +47 38 37.9 m 379
2004-05-11 18:07:12 C 18 16 05.64 +47 38 31.9 m 379
2004-05-12 19:48:11 C 18 43 09.74 +46 37 41.7 o 084
2004-05-12 19:51:26 C 18 43 12.96 +46 37 34.7 o 084
2004-05-12 21:06:06 C 18 44 25.87 +46 34 50.8 o 084
2004-05-12 21:07:13 C 18 44 26.94 +46 34 48.4 o 084
2004-05-13 20:16:09 C 19 06 24.50 +45 26 19.8 o 084
2004-05-13 20:17:17 C 19 06 25.51 +45 26 16.4 o 084
2004-05-13 20:19:13 C 19 06 27.23 +45 26 11.3 o 084
2004-05-13 20:20:20 C 19 06 28.20 +45 26 08.0 o 084
2004-05-14 15:30:56 C 19 23 05.42 +44 24 11.4 m 379
2004-05-14 15:35:53 C 19 23 09.30 +44 23 57.0 m 379
2004-05-14 15:37:33 C 19 23 10.60 +44 23 51.3 m 379
2004-05-14 15:42:29 C 19 23 14.23 +44 23 37.5 m 379
2004-05-14 20:23:34 C 19 27 01.72 +44 04 22.4 o 084
2004-05-14 20:24:42 C 19 27 02.65 +44 04 19.0 o 084
2004-05-16 07:58:41 C 19 53 23.75 +41 54 16.9 r H41
2004-05-16 08:01:28 C 19 53 25.40 +41 54 07.4 r H41
2004-05-16 08:02:54 C 19 53 26.28 +41 54 02.6 r H41
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)