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
2004-04-18 20:17:17 C 12 40 39.57 +16 00 12.4 r 557
2004-04-18 20:54:19 C 12 40 43.56 +16 01 54.1 r 557
2004-04-18 21:29:35 C 12 40 47.32 +16 03 30.2 r 557
2004-04-18 21:57:49 C 12 40 50.34 +16 04 46.7 r 557
2004-04-18 23:22:48 C 12 40 59.53 +16 08 35.9 r 557
2004-04-18 23:47:30 C 12 41 02.24 +16 09 41.1 r 557
2004-04-19 00:15:42 C 12 41 05.41 +16 10 56.1 r 557
2004-04-19 00:45:41 C 12 41 08.87 +16 12 15.5 r 557
2004-04-19 01:15:40 C 12 41 12.41 +16 13 34.5 r 557
2004-04-19 01:45:03 C 12 41 15.99 +16 14 51.9 r 557
2004-04-19 02:16:47 C 12 41 19.97 +16 16 15.2 r 557
2004-04-19 11:02:00 C 12 42 36.91 +16 41 59.5 F65
2004-04-19 11:05:10 C 12 42 37.24 +16 42 07.9 F65
2004-04-19 11:08:07 C 12 42 37.57 +16 42 16.1 F65
2004-04-19 11:12:54 C 12 42 38.06 +16 42 29.1 F65
2004-04-19 22:05:43 C 12 44 18.93 +17 11 46.5 o 084
2004-04-20 19:35:36 C 12 47 53.11 +18 15 48.6 c 434
2004-04-20 19:38:40 C 12 47 53.54 +18 15 58.1 c 434
2004-04-20 19:40:55 C 12 47 53.86 +18 16 05.4 c 434
2004-04-20 20:35:45 C 12 48 01.58 +18 18 54.2 r 203
2004-04-20 21:33:20 C 12 48 09.32 +18 21 52.5 r 203
2004-04-21 12:23:22 C 12 50 47.47 +19 08 29.8 r 379
2004-04-21 12:27:39 C 12 50 48.10 +19 08 43.8 r 379
2004-04-21 12:29:49 C 12 50 48.39 +19 08 50.7 r 379
2004-04-21 12:39:37 C 12 50 49.76 +19 09 22.1 r 379
2004-04-21 12:41:47 C 12 50 50.04 +19 09 29.2 r 379
2004-04-21 12:46:04 C 12 50 50.64 +19 09 43.5 r 379
2004-04-21 12:48:14 C 12 50 50.93 +19 09 50.1 r 379
2004-04-21 12:50:23 C 12 50 51.26 +19 09 57.2 r 379
2004-04-21 12:52:31 C 12 50 51.55 +19 10 04.1 r 379
2004-04-21 19:30:02 C 12 52 08.65 +19 30 30.1 r 185
2004-04-21 19:32:14 C 12 52 07.92 +19 30 34.3 r 557
2004-04-21 19:32:28 C 12 52 09.04 +19 30 38.2 r 185
2004-04-21 19:34:52 C 12 52 09.42 +19 30 46.1 r 185
2004-04-21 19:48:04 C 12 52 11.52 +19 31 30.1 r 185
2004-04-21 19:49:14 C 12 52 11.72 +19 31 33.7 r 185
2004-04-21 19:50:45 C 12 52 11.91 +19 31 38.9 r 185
2004-04-21 19:51:47 C 12 52 12.09 +19 31 42.7 r 185
2004-04-21 20:01:47 C 12 52 12.58 +19 32 12.3 r 557
2004-04-21 20:31:32 C 12 52 17.21 +19 33 50.5 r 557
2004-04-21 20:45:53 C 12 52 20.48 +19 34 47.8 r 203
2004-04-21 21:02:26 C 12 52 21.99 +19 35 32.0 r 557
2004-04-21 21:32:00 C 12 52 26.54 +19 37 08.7 r 557
2004-04-21 21:47:30 C 12 52 29.83 +19 38 10.6 r 203
2004-04-21 22:01:33 C 12 52 31.09 +19 38 44.7 r 557
2004-04-21 22:32:27 C 12 52 35.87 +19 40 24.6 r 557
2004-04-21 23:02:02 C 12 52 40.47 +19 41 59.5 r 557
2004-04-21 23:32:32 C 12 52 45.26 +19 43 36.9 r 557
2004-04-22 00:02:06 C 12 52 49.98 +19 45 11.0 r 557
2004-04-22 00:31:39 C 12 52 54.79 +19 46 44.5 r 557
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)