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
2004-03-17 22:32:37 C 12 08 37.73 -00 49 25.6 r 215
2004-03-17 22:33:10 C 12 08 37.73 -00 49 25.2 r 215
2004-03-18 08:11:37 C 12 08 41.73 -00 43 58.5 16.7 c 704
2004-03-18 08:28:04 C 12 08 41.65 -00 43 49.4 17.0 c 704
2004-03-18 08:44:05 C 12 08 41.58 -00 43 40.6 17.2 c 704
2004-03-18 09:08:39 C 12 08 41.48 -00 43 27.1 17.4 c 704
2004-03-18 09:25:03 C 12 08 41.42 -00 43 17.5 16.9 c 704
2004-03-19 06:06:02 C 12 08 55.43 -00 31 36.5 d 712
2004-03-19 06:13:01 C 12 08 55.34 -00 31 33.0 d 712
2004-03-19 06:22:33 C 12 08 55.33 -00 31 27.4 d 712
2004-03-20 03:52:38 C 12 09 08.64 -00 18 33.9 r H41
2004-03-20 03:56:19 C 12 09 08.64 -00 18 32.0 r H41
2004-03-20 03:58:35 C 12 09 08.64 -00 18 30.5 r H41
2004-03-21 01:05:51 C 12 09 17.70 -00 05 20.2 r 170
2004-03-21 01:09:52 C 12 09 17.69 -00 05 17.5 r 170
2004-03-21 06:59:18 C 12 09 25.16 -00 01 11.7 17.2 c 608
2004-03-21 07:14:16 C 12 09 25.18 -00 01 01.8 17.3 c 608
2004-03-21 07:30:01 C 12 09 25.15 -00 00 51.5 17.1 c 608
2004-03-21 07:51:35 C 12 09 20.35 -00 00 43.3 16.4 d H72
2004-03-21 07:56:15 C 12 09 20.28 -00 00 40.6 16.3 d H72
2004-03-21 08:00:55 C 12 09 20.31 -00 00 36.6 16.4 d H72
2004-03-21 08:05:35 C 12 09 20.35 -00 00 34.3 16.1 d H72
2004-03-21 08:49:39 C 12 09 20.90 -00 00 14.7 r H41
2004-03-21 08:59:32 C 12 09 20.88 -00 00 07.9 r H41
2004-03-21 09:02:05 C 12 09 20.88 -00 00 06.5 r H41
2004-03-21 09:04:01 C 12 09 20.93 -00 00 04.7 r H41
2004-03-21 14:02:13 C 12 09 22.94 +00 03 25.8 17.0 c 608
2004-03-21 14:17:21 C 12 09 22.92 +00 03 35.9 17.0 c 608
2004-03-21 14:33:19 C 12 09 22.94 +00 03 46.4 17.1 c 608
2004-03-22 06:26:19 C 12 09 36.86 +00 14 16.5 m 333
2004-03-22 06:38:12 C 12 09 35.65 +00 14 21.5 r H41
2004-03-22 06:42:50 C 12 09 35.63 +00 14 24.7 r H41
2004-03-22 06:45:04 C 12 09 35.65 +00 14 26.5 r H41
2004-03-22 06:47:39 C 12 09 35.59 +00 14 27.8 r H41
2004-03-22 06:50:23 C 12 09 35.56 +00 14 29.9 r H41
2004-03-22 07:24:29 C 12 09 36.51 +00 14 56.8 m 333
2004-03-22 08:22:45 C 12 09 36.23 +00 15 36.9 m 333
2004-03-24 06:34:32 C 12 10 07.55 +00 48 56.6 o 699
2004-03-24 07:03:43 C 12 10 07.40 +00 49 18.8 o 699
2004-03-24 07:32:53 C 12 10 07.27 +00 49 41.1 o 699
2004-03-24 08:02:07 C 12 10 07.12 +00 50 03.0 o 699
2004-03-25 04:56:14 C 12 10 24.56 +01 06 21.5 c 711
2004-03-25 05:01:40 C 12 10 24.54 +01 06 25.8 c 711
2004-03-25 05:07:00 C 12 10 24.52 +01 06 30.2 c 711
2004-03-25 05:12:30 C 12 10 24.51 +01 06 34.4 c 711
2004-03-25 05:17:54 C 12 10 24.48 +01 06 39.0 c 711
2004-03-25 05:23:12 C 12 10 24.46 +01 06 43.2 c 711
2004-03-27 06:13:03 C 12 11 03.24 +01 47 23.5 m 683
2004-03-27 06:14:05 C 12 11 03.15 +01 47 25.3 c 701
2004-03-27 06:32:23 C 12 11 03.20 +01 47 40.5 m 683
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)