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
2004-05-16 08:04:42 C 19 53 27.39 +41 53 56.2 r H41
2004-05-16 20:59:18 C 20 01 55.22 +41 01 26.0 o 084
2004-05-16 21:00:25 C 20 01 55.91 +41 01 21.8 o 084
2004-05-16 23:28:02 C 20 03 31.34 +40 52 15.3 c J93
2004-05-16 23:38:53 C 20 03 37.80 +40 51 37.9 c J93
2004-05-16 23:41:19 C 20 03 39.40 +40 51 29.4 c J93
2004-05-16 23:45:05 C 20 03 41.55 +40 51 18.7 c J93
2004-05-16 23:47:40 C 20 03 43.18 +40 51 08.1 c J93
2004-05-17 01:24:04 C 20 04 38.77 +40 45 56.1 o 198
2004-05-17 01:25:59 C 20 04 39.86 +40 45 49.2 o 198
2004-05-17 01:28:20 C 20 04 41.20 +40 45 40.9 o 198
2004-05-17 01:31:44 C 20 04 43.13 +40 45 28.6 o 198
2004-05-17 01:33:01 C 20 04 43.85 +40 45 24.0 o 198
2004-05-17 20:53:05 C 20 16 10.48 +39 28 39.1 o 084
2004-05-17 20:54:13 C 20 16 11.12 +39 28 34.9 o 084
2004-05-17 23:27:35 C 20 17 38.88 +39 19 08.2 c J93
2004-05-17 23:31:17 C 20 17 41.09 +39 18 54.9 c J93
2004-05-18 01:32:53 C 20 18 44.81 +39 11 49.7 c J93
2004-05-18 01:43:57 C 20 18 50.39 +39 11 10.1 c J93
2004-05-18 01:46:43 C 20 18 51.58 +39 11 02.4 c J93
2004-05-18 01:48:49 C 20 18 52.63 +39 10 54.3 c J93
2004-05-18 22:20:54 C 20 29 36.58 +37 50 59.5 c J93
2004-05-18 22:23:58 C 20 29 38.07 +37 50 49.4 c J93
2004-05-18 22:28:50 C 20 29 40.52 +37 50 32.3 c J93
2004-05-18 23:01:09 C 20 29 57.88 +37 49 25.5 c 108
2004-05-18 23:03:29 C 20 29 59.01 +37 49 17.6 c 108
2004-05-18 23:07:29 C 20 30 00.85 +37 49 04.9 c 108
2004-05-18 23:09:44 C 20 30 01.98 +37 48 56.8 c 108
2004-05-19 08:31:44 C 20 34 27.37 +37 15 05.5 r H41
2004-05-19 08:35:06 C 20 34 28.75 +37 14 53.9 r H41
2004-05-19 08:36:41 C 20 34 29.39 +37 14 48.4 r H41
2004-05-19 08:38:11 C 20 34 30.01 +37 14 43.4 r H41
2004-05-19 08:39:45 C 20 34 30.64 +37 14 37.8 r H41
2004-05-19 23:20:13 C 20 41 11.00 +36 18 14.1 c J93
2004-05-19 23:23:48 C 20 41 12.66 +36 18 01.5 c J93
2004-05-19 23:27:23 C 20 41 14.00 +36 17 50.8 c J93
2004-05-19 23:30:59 C 20 41 15.79 +36 17 38.2 c J93
2004-05-20 08:46:07 C 20 45 09.07 +35 45 58.4 r H41
2004-05-20 08:48:01 C 20 45 09.75 +35 45 52.4 r H41
2004-05-20 08:49:51 C 20 45 10.42 +35 45 46.2 r H41
2004-05-20 08:51:58 C 20 45 11.21 +35 45 39.9 r H41
2004-05-20 08:55:56 C 20 45 12.57 +35 45 25.9 r H41
2004-05-20 21:01:41 C 20 50 06.96 +34 59 58.0 o 084
2004-05-20 21:02:59 C 20 50 07.41 +34 59 54.0 o 084
2004-05-20 21:41:49 C 20 50 22.44 +34 57 48.1 o 084
2004-05-21 08:56:19 C 20 54 38.37 +34 20 41.6 r H41
2004-05-21 08:58:05 C 20 54 38.94 +34 20 36.0 r H41
2004-05-21 08:59:36 C 20 54 39.43 +34 20 31.0 r H41
2004-05-21 09:01:12 C 20 54 39.94 +34 20 25.8 r H41
2004-05-21 09:02:42 C 20 54 40.39 +34 20 21.1 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)