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
2004-08-18 22:46:55 C 21 47 14.53 -07 45 59.4 c 046
2004-08-18 22:47:41 C 21 47 14.50 -07 45 59.5 c 046
2004-08-18 23:33:44 C 21 47 12.13 -07 46 33.1 r A41
2004-08-20 08:51:23 C 21 45 50.11 -08 10 41.1 c 691
2004-08-20 09:55:21 C 21 45 47.05 -08 11 26.0 c 691
2004-08-20 10:32:02 C 21 45 45.35 -08 11 51.7 c 691
2004-08-24 04:32:42 C 21 42 33.10 -09 12 31.9 r H41
2004-08-24 04:35:25 C 21 42 32.96 -09 12 33.3 r H41
2004-08-24 04:37:55 C 21 42 32.85 -09 12 34.7 r H41
2004-08-24 04:40:21 C 21 42 32.75 -09 12 36.3 r H41
2004-08-24 04:42:47 C 21 42 32.67 -09 12 37.3 r H41
2004-08-24 05:36:18 C 21 42 30.48 -09 13 11.9 r H41
2004-08-24 05:39:16 C 21 42 30.32 -09 13 13.7 r H41
2004-08-24 05:41:42 C 21 42 30.24 -09 13 15.6 r H41
2004-08-24 05:44:06 C 21 42 30.17 -09 13 16.8 r H41
2004-08-24 05:46:33 C 21 42 30.07 -09 13 19.1 r H41
2004-08-25 05:12:10 C 21 41 46.19 -09 27 51.9 r H41
2004-08-25 05:17:21 C 21 41 45.96 -09 27 55.0 r H41
2004-08-25 05:25:04 C 21 41 45.61 -09 27 59.7 r H41
2004-08-25 05:27:36 C 21 41 45.58 -09 28 02.3 r H41
2004-08-26 05:43:23 C 21 41 02.48 -09 42 34.9 r H41
2004-08-26 05:47:50 C 21 41 02.39 -09 42 36.9 r H41
2004-08-26 05:50:22 C 21 41 02.25 -09 42 38.7 r H41
2004-08-26 05:52:50 C 21 41 02.10 -09 42 40.8 r H41
2004-09-07 04:18:41 C 21 36 17.99 -11 55 24.0 18.8 c 704
2004-09-07 04:34:52 C 21 36 17.85 -11 55 30.1 19.3 c 704
2004-09-07 04:51:07 C 21 36 17.65 -11 55 35.2 19.6 c 704
2004-09-07 05:07:22 C 21 36 17.44 -11 55 41.3 19.6 c 704
2004-09-09 04:09:18 C 21 36 09.77 -12 10 55.2 18.9 c 704
2004-09-09 04:25:30 C 21 36 09.60 -12 11 00.4 19.4 c 704
2004-09-09 04:41:34 C 21 36 09.50 -12 11 05.5 19.1 c 704
2004-09-09 04:57:38 C 21 36 09.38 -12 11 10.6 19.3 c 704
2004-09-09 05:14:36 C 21 36 09.27 -12 11 16.4 19.3 c 704
2004-09-09 05:45:31 C 21 36 09.21 -12 11 26.8 o 699
2004-09-09 05:59:31 C 21 36 09.07 -12 11 30.4 o 699
2004-09-09 06:13:34 C 21 36 08.92 -12 11 34.6 o 699
2004-09-09 06:27:35 C 21 36 08.88 -12 11 39.1 o 699
2004-09-11 02:59:35 C 21 36 12.78 -12 24 23.9 c 691
2004-09-11 03:38:39 C 21 36 12.69 -12 24 34.8 c 691
2004-09-11 04:36:02 C 21 36 12.49 -12 24 50.8 c 691
2006-12-14 08:25:16 C 07 00 53.42 +18 07 17.6 c 691
2009-11-09 09:40:42 C 04 19 00.80 +17 32 58.6 r G96
2009-11-09 09:50:53 C 04 19 00.01 +17 32 56.4 r G96
2009-11-09 10:01:19 C 04 18 59.22 +17 32 53.2 r G96
2009-11-09 10:11:39 C 04 18 58.50 +17 32 50.5 r G96
2009-11-10 06:05:46 C 04 17 32.45 +17 27 42.7 o 691
2009-11-10 06:30:32 C 04 17 30.58 +17 27 36.6 o 691
2009-11-18 03:24:02 C 04 02 48.29 +16 36 22.7 o 691
2009-11-18 04:14:48 C 04 02 44.10 +16 36 09.9 o 691
2009-11-22 04:18:54 C 03 54 53.59 +16 09 18.0 o 691
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)