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
2004-02-18 10:49:21 C 11 56 34.90 -02 55 12.0 18.8 c 704
2004-02-19 08:28:12 C 11 57 14.07 -02 56 59.4 19.1 c 704
2004-02-19 08:45:11 C 11 57 14.38 -02 57 00.9 19.6 c 704
2004-02-19 09:02:10 C 11 57 14.77 -02 57 02.6 19.5 c 704
2004-02-19 09:19:30 C 11 57 15.17 -02 57 04.0 19.5 c 704
2004-02-19 09:36:56 C 11 57 15.57 -02 57 05.1 19.4 c 704
2004-02-20 23:19:57 C 11 58 19.93 -02 59 34.1 c 246
2004-02-20 23:22:31 C 11 58 19.96 -02 59 34.3 c 246
2004-02-20 23:23:49 C 11 58 19.99 -02 59 34.1 c 246
2004-02-20 23:25:05 C 11 58 20.05 -02 59 34.5 c 246
2004-02-20 23:29:05 C 11 58 20.14 -02 59 34.4 c 246
2004-02-20 23:31:41 C 11 58 20.19 -02 59 35.1 c 246
2004-02-25 07:39:21 C 12 00 57.44 -03 01 05.1 o 704
2004-02-25 07:56:47 C 12 00 57.61 -03 01 04.7 o 704
2004-02-25 08:14:09 C 12 00 57.87 -03 01 04.6 o 704
2004-02-25 08:31:41 C 12 00 58.19 -03 01 03.8 o 704
2004-02-29 00:51:10 C 12 02 51.40 -02 56 10.5 r 176
2004-02-29 00:55:31 C 12 02 51.45 -02 56 10.1 r 176
2004-02-29 01:02:01 C 12 02 51.52 -02 56 09.5 r 176
2004-02-29 01:10:50 C 12 02 51.62 -02 56 08.7 r 176
2004-02-29 01:18:59 C 12 02 51.71 -02 56 08.0 r 176
2004-03-04 16:47:39 C 12 04 49.620 -02 40 01.96 r 413
2004-03-04 16:51:19 C 12 04 49.648 -02 40 01.22 r 413
2004-03-04 16:54:59 C 12 04 49.670 -02 40 00.50 r 413
2004-03-09 23:59:17 12 06 37.41 -02 09 38.6 o 084
2004-03-11 23:59:39 12 07 11.14 -01 53 29.4 o 084
2004-03-12 23:50:01 12 07 26.79 -01 44 30.7 o 084
2004-03-13 14:58:50 C 12 07 37.28 -01 38 14.1 r 379
2004-03-13 15:02:00 C 12 07 37.26 -01 38 12.5 r 379
2004-03-13 15:11:26 C 12 07 37.24 -01 38 09.6 r 379
2004-03-13 15:14:36 C 12 07 37.22 -01 38 08.1 r 379
2004-03-14 00:54:26 12 07 42.02 -01 34 20.9 o 084
2004-03-15 07:24:32 C 12 08 01.74 -01 20 40.9 d 703
2004-03-15 07:44:11 C 12 08 01.66 -01 20 32.0 d 703
2004-03-15 08:03:53 C 12 08 01.49 -01 20 23.2 d 703
2004-03-15 08:23:42 C 12 08 01.54 -01 20 14.0 d 703
2004-03-15 13:59:21 C 12 08 06.16 -01 17 41.1 r 379
2004-03-15 14:05:40 C 12 08 06.15 -01 17 37.4 r 379
2004-03-15 14:15:06 C 12 08 06.09 -01 17 34.1 r 379
2004-03-16 06:51:46 C 12 08 15.44 -01 09 37.1 17.7 c 704
2004-03-16 07:08:21 C 12 08 15.38 -01 09 28.6 17.6 c 704
2004-03-16 07:25:34 C 12 08 15.29 -01 09 20.0 17.4 c 704
2004-03-16 07:41:53 C 12 08 15.24 -01 09 12.2 17.7 c 704
2004-03-16 07:58:09 C 12 08 15.26 -01 09 04.2 18.7 c 704
2004-03-16 22:38:21 C 12 08 24.57 -01 01 55.2 r A16
2004-03-16 22:51:16 C 12 08 24.58 -01 01 48.7 r A16
2004-03-16 22:59:00 C 12 08 24.53 -01 01 45.0 r A16
2004-03-16 23:04:10 C 12 08 24.51 -01 01 41.8 r A16
2004-03-16 23:11:54 C 12 08 24.56 -01 01 37.9 r A16
2004-03-17 22:32:02 C 12 08 37.73 -00 49 26.0 r 215
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)