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
2001-10-18 09:39:02 C 02 34 59.61 +12 20 04.8 c 644
2001-10-18 10:09:22 C 02 34 57.24 +12 19 52.1 c 644
2001-10-18 10:43:24 C 02 34 54.60 +12 19 35.8 c 644
2001-10-23 10:13:58 C 02 25 45.81 +11 24 44.8 d 691
2001-10-23 10:45:28 C 02 25 43.39 +11 24 30.5 d 691
2001-10-23 11:16:54 C 02 25 40.89 +11 24 15.7 d 691
2001-10-24 05:25:44 C 02 24 17.44 +11 15 52.2 d 291
2001-10-24 05:44:03 C 02 24 15.97 +11 15 44.1 d 291
2001-10-24 05:55:28 C 02 24 15.03 +11 15 38.0 d 291
2001-10-24 07:23:37 C 02 24 07.89 +11 14 57.5 d 691
2001-10-24 07:30:16 C 02 24 07.36 +11 14 54.3 d 691
2001-10-24 07:36:45 C 02 24 06.84 +11 14 51.4 d 691
2001-10-25 07:07:09 C 02 22 17.47 +11 03 58.7 c 644
2001-10-25 07:09:23 C 02 22 17.28 +11 03 57.4 d 291
2001-10-25 07:24:36 C 02 22 15.98 +11 03 51.0 d 291
2001-10-25 07:42:23 C 02 22 14.58 +11 03 43.4 c 644
2001-10-25 08:16:28 C 02 22 11.80 +11 03 27.2 c 644
2001-10-26 05:11:57 C 02 20 34.97 +10 53 47.9 d 291
2001-10-26 05:17:34 C 02 20 34.53 +10 53 45.3 d 291
2001-10-26 05:24:25 C 02 20 33.94 +10 53 42.4 d 291
2001-10-26 07:31:36 C 02 20 23.51 +10 52 44.7 c 711
2001-10-26 07:46:05 C 02 20 22.41 +10 52 39.0 c 711
2001-10-26 08:00:29 C 02 20 21.29 +10 52 29.2 c 711
2001-10-27 05:12:21 C 02 18 43.53 +10 42 46.0 d 691
2001-10-27 05:18:59 C 02 18 42.98 +10 42 42.8 d 691
2001-10-27 05:24:48 C 02 18 42.52 +10 42 40.8 d 691
2001-10-27 10:10:33 C 02 18 19.54 +10 40 29.3 d 691
2001-10-27 10:17:24 C 02 18 19.00 +10 40 26.2 d 691
2001-10-27 10:23:21 C 02 18 18.51 +10 40 23.4 d 691
2001-11-11 08:21:32 C 01 53 15.51 +08 14 05.4 d 291
2001-11-11 08:36:12 C 01 53 14.66 +08 13 59.5 d 291
2001-11-11 09:11:34 C 01 53 12.55 +08 13 46.5 d 291
2001-11-18 02:53:12 C 01 44 47.36 +07 26 37.8 d 691
2001-11-18 02:58:40 C 01 44 46.96 +07 26 35.9 d 691
2001-11-18 03:04:06 C 01 44 46.74 +07 26 33.8 d 691
2004-01-29 11:19:27 C 11 37 44.97 -01 14 01.6 d 291
2004-01-29 11:31:59 C 11 37 45.51 -01 14 05.4 d 291
2004-01-29 11:44:29 C 11 37 46.06 -01 14 09.3 d 291
2004-01-30 08:27:17 C 11 38 45.81 -01 20 26.1 d 291
2004-01-30 08:39:59 C 11 38 46.37 -01 20 29.6 d 291
2004-01-30 08:54:17 C 11 38 47.05 -01 20 34.9 d 291
2004-02-13 07:29:41 C 11 52 36.20 -02 39 31.8 19.4 c 644
2004-02-13 08:54:42 C 11 52 38.67 -02 39 47.0 19.1 c 644
2004-02-13 10:04:59 C 11 52 40.69 -02 39 58.9 18.8 c 644
2004-02-15 09:55:03 C 11 54 18.01 -02 46 59.8 d 703
2004-02-15 10:08:10 C 11 54 18.41 -02 47 02.2 d 703
2004-02-15 10:21:17 C 11 54 18.70 -02 47 04.5 d 703
2004-02-15 10:34:24 C 11 54 19.10 -02 47 03.6 d 703
2004-02-18 09:40:52 C 11 56 33.37 -02 55 04.8 19.0 c 704
2004-02-18 09:57:43 C 11 56 33.74 -02 55 06.9 19.6 c 704
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)