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
2004-06-18 09:24:13 C 22 26 48.41 +14 15 48.6 r H41
2004-06-18 09:26:45 C 22 26 48.46 +14 15 46.4 r H41
2004-06-18 09:28:55 C 22 26 50.05 +14 15 41.2 o 699
2004-06-18 09:56:55 C 22 26 50.65 +14 15 16.0 o 699
2004-06-27 10:30:45 C 22 32 24.25 +11 04 36.0 c 670
2004-06-27 10:36:42 C 22 32 24.28 +11 04 30.2 c 670
2004-06-29 07:41:51 C 22 32 52.28 +10 26 37.8 r H41
2004-06-29 07:44:38 C 22 32 52.27 +10 26 34.9 r H41
2004-06-29 07:49:03 C 22 32 52.18 +10 26 31.5 r H41
2004-06-29 07:54:28 C 22 32 52.11 +10 26 27.0 r H41
2004-07-06 08:22:51 C 22 32 34.13 +08 05 37.6 r H41
2004-07-06 08:25:02 C 22 32 34.06 +08 05 36.1 r H41
2004-07-06 08:27:29 C 22 32 33.95 +08 05 33.9 r H41
2004-07-06 08:30:33 C 22 32 33.90 +08 05 31.7 r H41
2004-07-06 08:33:56 C 22 32 33.78 +08 05 28.6 r H41
2004-07-08 08:09:57 C 22 31 56.06 +07 25 04.0 r H41
2004-07-08 08:12:26 C 22 31 55.90 +07 25 01.9 r H41
2004-07-08 08:14:59 C 22 31 55.80 +07 25 00.1 r H41
2004-07-08 08:17:27 C 22 31 55.71 +07 24 58.4 r H41
2004-07-08 08:20:19 C 22 31 55.63 +07 24 55.4 r H41
2004-07-12 08:50:19 C 22 29 53.47 +06 01 03.5 r H41
2004-07-12 08:52:53 C 22 29 53.36 +06 01 01.4 r H41
2004-07-12 08:55:20 C 22 29 53.29 +06 00 59.7 r H41
2004-07-13 07:50:32 C 22 29 17.01 +05 40 36.1 r H41
2004-07-13 07:53:36 C 22 29 16.90 +05 40 33.6 r H41
2004-07-13 07:56:02 C 22 29 16.76 +05 40 31.9 r H41
2004-07-13 07:58:33 C 22 29 16.64 +05 40 29.2 r H41
2004-07-13 08:02:49 C 22 29 16.48 +05 40 25.6 r H41
2004-07-14 07:38:15 C 22 28 35.23 +05 19 14.4 r H41
2004-07-14 07:41:01 C 22 28 35.09 +05 19 11.7 r H41
2004-07-14 07:43:33 C 22 28 34.97 +05 19 09.5 r H41
2004-07-14 07:45:59 C 22 28 34.85 +05 19 07.9 r H41
2004-07-14 07:48:26 C 22 28 34.74 +05 19 05.3 r H41
2004-07-15 08:14:22 C 22 27 47.83 +04 56 56.9 r H41
2004-07-15 08:16:52 C 22 27 47.73 +04 56 55.1 r H41
2004-07-15 08:19:16 C 22 27 47.65 +04 56 52.6 r H41
2004-07-15 08:21:51 C 22 27 47.49 +04 56 50.0 r H41
2004-07-25 00:38:51 C 22 18 04.01 +01 16 34.2 r 941
2004-07-25 00:41:08 C 22 18 03.87 +01 16 32.1 r 941
2004-07-25 00:42:16 C 22 18 03.82 +01 16 31.0 r 941
2004-07-25 00:43:24 C 22 18 03.74 +01 16 29.8 r 941
2004-07-25 00:45:41 C 22 18 03.60 +01 16 27.8 r 941
2004-07-27 07:11:15 C 22 15 18.63 +00 23 20.3 r H41
2004-07-27 07:13:48 C 22 15 18.49 +00 23 17.7 r H41
2004-07-27 07:20:07 C 22 15 17.99 +00 23 12.2 r H41
2004-07-27 07:22:31 C 22 15 17.91 +00 23 10.2 r H41
2004-07-27 07:25:00 C 22 15 17.77 +00 23 06.9 r H41
2004-07-28 07:40:34 C 22 14 01.90 -00 00 36.8 r H41
2004-07-28 07:43:27 C 22 14 01.67 -00 00 39.8 r H41
2004-07-28 07:46:25 C 22 14 01.54 -00 00 42.3 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)