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
2004-08-10 07:55:23 C 21 57 08.84 -04 56 13.6 r H41
2004-08-10 07:57:29 C 21 57 08.73 -04 56 14.7 r H41
2004-08-10 22:50:36 C 21 56 23.12 -05 09 31.0 c 046
2004-08-10 22:51:53 C 21 56 23.02 -05 09 32.5 c 046
2004-08-10 22:52:48 C 21 56 22.97 -05 09 33.4 c 046
2004-08-10 22:53:49 C 21 56 22.89 -05 09 34.2 c 046
2004-08-10 22:55:38 C 21 56 22.77 -05 09 35.7 c 046
2004-08-10 22:56:41 C 21 56 22.70 -05 09 36.5 c 046
2004-08-12 05:56:17 C 21 54 47.61 -05 36 26.1 17.9 c 704
2004-08-12 06:10:25 C 21 54 46.71 -05 36 38.2 18.4 c 704
2004-08-12 06:24:38 C 21 54 45.84 -05 36 50.6 17.9 c 704
2004-08-12 06:31:39 C 21 54 44.82 -05 36 58.5 r H41
2004-08-12 06:33:47 C 21 54 44.72 -05 37 00.9 r H41
2004-08-12 06:37:22 C 21 54 44.47 -05 37 03.4 r H41
2004-08-12 06:38:41 C 21 54 44.96 -05 37 02.7 18.2 c 704
2004-08-12 06:40:00 C 21 54 44.34 -05 37 05.1 r H41
2004-08-12 06:42:06 C 21 54 44.24 -05 37 07.9 r H41
2004-08-12 06:52:47 C 21 54 44.13 -05 37 14.8 18.0 c 704
2004-08-14 08:20:53 C 21 52 14.79 -06 19 02.2 r H41
2004-08-14 08:25:09 C 21 52 14.47 -06 19 06.8 r H41
2004-08-14 21:36:39 C 21 51 38.40 -06 30 01.4 c 108
2004-08-14 21:48:15 C 21 51 37.70 -06 30 11.3 c 108
2004-08-15 10:03:25 C 21 50 59.94 -06 40 02.5 r H41
2004-08-15 10:09:03 C 21 50 59.68 -06 40 08.3 r H41
2004-08-15 10:11:20 C 21 50 59.58 -06 40 10.4 r H41
2004-08-16 07:29:17 C 21 50 01.15 -06 57 15.3 r H41
2004-08-16 07:31:31 C 21 50 01.01 -06 57 17.1 r H41
2004-08-16 07:33:38 C 21 50 00.92 -06 57 18.3 r H41
2004-08-16 07:35:43 C 21 50 00.82 -06 57 20.6 r H41
2004-08-16 07:37:49 C 21 50 00.67 -06 57 22.0 r H41
2004-08-16 22:04:29 C 21 49 22.41 -07 08 50.1 r A41
2004-08-16 22:24:09 C 21 49 21.34 -07 09 05.7 r A41
2004-08-16 22:43:34 C 21 49 20.32 -07 09 20.9 r A41
2004-08-17 06:10:30 C 21 49 00.15 -07 15 03.6 r H41
2004-08-17 06:11:21 C 21 49 00.66 -07 15 02.7 17.6 c 704
2004-08-17 06:13:22 C 21 48 59.94 -07 15 05.9 r H41
2004-08-17 06:19:29 C 21 48 59.66 -07 15 09.9 r H41
2004-08-17 06:22:25 C 21 48 59.46 -07 15 12.7 r H41
2004-08-17 06:25:51 C 21 48 59.27 -07 15 14.6 r H41
2004-08-17 06:25:54 C 21 48 59.88 -07 15 14.7 17.8 c 704
2004-08-17 06:40:32 C 21 48 59.01 -07 15 25.8 17.9 c 704
2004-08-17 06:56:10 C 21 48 58.23 -07 15 37.9 18.1 c 704
2004-08-18 22:18:08 C 21 47 15.97 -07 45 37.5 r A41
2004-08-18 22:40:08 C 21 47 14.85 -07 45 54.0 c 046
2004-08-18 22:40:33 C 21 47 14.88 -07 45 54.5 r A41
2004-08-18 22:42:43 C 21 47 14.75 -07 45 55.9 c 046
2004-08-18 22:43:45 C 21 47 14.68 -07 45 56.7 c 046
2004-08-18 22:44:35 C 21 47 14.57 -07 45 57.6 c 046
2004-08-18 22:45:21 C 21 47 14.59 -07 45 57.4 c 046
2004-08-18 22:46:09 C 21 47 14.57 -07 45 58.6 c 046
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)