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
2004-05-21 09:04:14 C 20 54 40.89 +34 20 16.3 r H41
2004-05-21 21:00:00 C 20 59 00.24 +33 37 25.2 o 084
2004-05-21 21:01:39 C 20 59 00.76 +33 37 20.3 o 084
2004-05-22 08:50:28 C 21 03 02.08 +33 00 12.9 r H41
2004-05-22 08:54:08 C 21 03 03.16 +33 00 01.7 r H41
2004-05-22 08:55:58 C 21 03 03.68 +32 59 55.9 r H41
2004-05-22 08:57:46 C 21 03 04.16 +32 59 50.7 r H41
2004-05-22 08:59:36 C 21 03 04.71 +32 59 44.9 r H41
2004-05-22 21:42:47 C 21 07 11.56 +32 16 42.3 o 084
2004-05-22 22:44:32 C 21 07 32.88 +32 13 19.3 c J93
2004-05-22 22:46:37 C 21 07 33.54 +32 13 14.3 c J93
2004-05-22 22:48:43 C 21 07 34.36 +32 13 08.2 c J93
2004-05-23 22:15:58 C 21 14 29.28 +31 00 45.1 o 084
2004-05-23 22:20:23 C 21 14 30.46 +31 00 32.7 o 084
2004-05-23 22:22:23 C 21 14 30.99 +31 00 27.2 o 084
2004-05-24 17:50:53 C 21 19 46.36 +30 04 47.3 r 379
2004-05-24 17:57:21 C 21 19 47.68 +30 04 29.7 r 379
2004-05-24 17:59:29 C 21 19 48.23 +30 04 25.2 r 379
2004-05-25 17:39:41 C 21 25 40.52 +28 58 09.5 r 379
2004-05-25 17:44:00 C 21 25 41.44 +28 57 58.4 r 379
2004-05-25 18:29:02 C 21 25 50.10 +28 56 02.6 r 379
2004-05-25 18:31:12 C 21 25 50.44 +28 55 56.9 r 379
2004-05-25 18:40:26 C 21 25 52.16 +28 55 33.3 r 379
2004-05-25 18:42:34 C 21 25 52.65 +28 55 27.5 r 379
2004-05-25 22:23:21 C 21 26 46.92 +28 43 51.2 o 084
2004-05-25 22:28:39 C 21 26 48.08 +28 43 38.0 o 084
2004-05-25 23:06:22 C 21 26 56.34 +28 42 03.5 o 084
2004-05-29 00:06:25 C 21 41 43.10 +25 43 08.6 r 198
2004-05-29 00:10:22 C 21 41 43.75 +25 43 00.3 r 198
2004-05-29 00:12:34 C 21 41 44.10 +25 42 55.8 r 198
2004-05-31 08:28:01 C 21 50 46.56 +23 45 34.4 r H41
2004-05-31 08:30:38 C 21 50 46.91 +23 45 29.9 r H41
2004-05-31 08:32:23 C 21 50 47.10 +23 45 26.5 r H41
2004-05-31 08:35:06 C 21 50 47.44 +23 45 22.1 r H41
2004-06-01 07:50:37 C 21 54 05.77 +23 00 48.3 r H41
2004-06-01 07:53:35 C 21 54 06.09 +23 00 42.8 r H41
2004-06-01 07:56:58 C 21 54 06.47 +23 00 37.5 r H41
2004-06-01 07:59:26 C 21 54 06.71 +23 00 33.2 r H41
2004-06-01 08:01:34 C 21 54 06.98 +23 00 29.7 r H41
2004-06-11 09:51:48 C 22 17 48.46 +17 08 52.2 r H41
2004-06-11 09:54:17 C 22 17 48.58 +17 08 49.7 r H41
2004-06-11 09:56:26 C 22 17 48.67 +17 08 47.0 r H41
2004-06-12 09:05:41 C 22 19 21.97 +16 42 32.9 r H41
2004-06-12 09:07:48 C 22 19 22.06 +16 42 30.9 r H41
2004-06-12 09:10:45 C 22 19 22.18 +16 42 27.6 r H41
2004-06-12 09:13:11 C 22 19 22.22 +16 42 25.0 r H41
2004-06-12 09:15:14 C 22 19 22.34 +16 42 23.0 r H41
2004-06-18 08:32:57 C 22 26 48.72 +14 16 30.3 o 699
2004-06-18 09:00:55 C 22 26 49.42 +14 16 06.1 o 699
2004-06-18 09:21:09 C 22 26 48.34 +14 15 51.4 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)