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
2004-04-06 21:57:19 C 12 17 42.23 +06 34 43.8 o 084
2004-04-07 22:45:23 C 12 18 47.83 +07 10 58.5 o 084
2004-04-09 01:02:30 C 12 20 04.34 +07 51 23.2 c A83
2004-04-09 01:13:15 C 12 20 04.83 +07 51 40.0 c A83
2004-04-09 05:22:24 C 12 20 22.78 +07 59 05.3 c 701
2004-04-09 05:58:56 C 12 20 23.68 +08 00 04.4 c 701
2004-04-09 12:48:55 C 12 20 45.569 +08 13 01.32 r 413
2004-04-09 12:51:04 C 12 20 45.623 +08 13 04.80 r 413
2004-04-09 12:53:14 C 12 20 45.684 +08 13 08.36 r 413
2004-04-09 13:08:49 C 12 20 47.69 +08 11 32.6 m 300
2004-04-09 13:28:49 C 12 20 48.29 +08 12 06.2 m 300
2004-04-09 13:33:55 C 12 20 48.02 +08 12 13.1 r 379
2004-04-09 13:38:49 C 12 20 48.59 +08 12 22.2 m 300
2004-04-09 13:40:22 C 12 20 48.20 +08 12 23.6 r 379
2004-04-09 13:42:30 C 12 20 48.26 +08 12 27.1 r 379
2004-04-09 13:48:49 C 12 20 48.89 +08 12 39.2 m 300
2004-04-09 13:48:57 C 12 20 48.42 +08 12 37.6 r 379
2004-04-09 13:58:48 C 12 20 49.18 +08 12 55.7 m 300
2004-04-10 05:16:27 C 12 21 43.34 +08 38 13.3 14.1 c 644
2004-04-10 05:44:27 C 12 21 44.24 +08 39 01.0 13.9 c 644
2004-04-10 06:13:48 C 12 21 45.15 +08 39 50.7 13.8 c 644
2004-04-10 23:48:35 C 12 22 45.28 +09 09 16.8 o 084
2004-04-11 22:49:49 C 12 24 18.21 +09 50 56.2 r 204
2004-04-11 22:54:04 C 12 24 18.39 +09 51 03.9 r 204
2004-04-11 23:01:57 C 12 24 18.75 +09 51 18.4 r 204
2004-04-11 23:05:15 C 12 24 18.89 +09 51 24.4 r 204
2004-04-12 19:22:54 C 12 25 50.79 +10 29 24.8 r 557
2004-04-12 20:42:01 C 12 25 55.09 +10 31 59.8 r 557
2004-04-12 21:40:48 C 12 25 58.13 +10 33 54.1 r 557
2004-04-12 22:39:35 C 12 26 01.15 +10 35 47.7 r 557
2004-04-12 23:26:37 C 12 26 03.62 +10 37 18.0 r 557
2004-04-12 23:44:18 C 12 26 04.13 +10 37 35.2 o 084
2004-04-13 00:13:38 C 12 26 06.18 +10 38 48.0 r 557
2004-04-13 01:12:25 C 12 26 09.58 +10 40 39.8 r 557
2004-04-13 01:47:40 C 12 26 11.77 +10 41 46.7 r 557
2004-04-13 14:47:25 C 12 27 15.80 +11 07 58.7 m D89
2004-04-13 14:49:46 C 12 27 15.92 +11 08 03.4 m D89
2004-04-13 14:50:47 C 12 27 15.97 +11 08 05.4 m D89
2004-04-13 15:38:33 C 12 27 18.48 +11 09 39.7 m D89
2004-04-13 15:39:10 C 12 27 18.54 +11 09 41.1 m D89
2004-04-13 15:51:33 C 12 27 19.23 +11 10 05.2 m D89
2004-04-13 22:00:46 C 12 27 52.22 +11 21 58.1 o 084
2004-04-14 05:11:00 C 12 28 32.08 +11 37 36.8 c 701
2004-04-14 06:37:05 C 12 28 36.58 +11 40 36.8 c 701
2004-04-14 07:21:29 C 12 28 38.94 +11 42 08.3 c 701
2004-04-14 13:32:55 C 12 29 14.59 +11 55 03.8 300
2004-04-14 13:42:49 C 12 29 15.18 +11 55 25.1 300
2004-04-14 13:52:48 C 12 29 15.70 +11 55 46.7 300
2004-04-14 14:12:48 C 12 29 16.81 +11 56 28.2 300
2004-04-14 14:22:49 C 12 29 17.38 +11 56 50.0 300
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)