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
2004-04-22 01:01:12 C 12 52 59.70 +19 48 17.6 r 557
2004-04-22 01:30:52 C 12 53 04.73 +19 49 50.8 r 557
2004-04-22 02:01:46 C 12 53 10.11 +19 51 27.6 r 557
2004-04-22 19:45:08 C 12 56 56.00 +20 51 10.9 r 557
2004-04-22 20:14:42 C 12 57 01.24 +20 52 55.0 r 557
2004-04-22 20:44:17 C 12 57 06.42 +20 54 38.5 r 557
2004-04-22 21:15:12 C 12 57 11.82 +20 56 26.3 r 557
2004-04-22 21:44:43 C 12 57 16.96 +20 58 08.8 r 557
2004-04-22 22:14:19 C 12 57 22.12 +20 59 50.6 r 557
2004-04-22 22:45:12 C 12 57 27.54 +21 01 36.5 r 557
2004-04-22 23:13:05 C 12 57 32.43 +21 03 10.8 r 557
2004-04-22 23:45:19 C 12 57 38.24 +21 05 00.8 r 557
2004-04-23 00:15:26 C 12 57 43.71 +21 06 42.2 r 557
2004-04-23 00:44:59 C 12 57 49.18 +21 08 21.4 r 557
2004-04-23 01:14:38 C 12 57 54.78 +21 10 00.4 r 557
2004-04-23 20:17:12 C 13 02 19.63 +22 17 43.9 o 084
2004-04-24 11:31:22 C 13 06 08.07 +23 15 36.0 r 379
2004-04-24 11:39:58 C 13 06 09.83 +23 16 09.9 r 379
2004-04-24 11:42:06 C 13 06 10.31 +23 16 18.1 r 379
2004-04-24 11:44:15 C 13 06 10.71 +23 16 26.8 r 379
2004-04-24 11:46:25 C 13 06 11.22 +23 16 35.8 r 379
2004-04-24 12:15:47 C 13 06 17.30 +23 18 31.0 r 379
2004-04-24 12:17:57 C 13 06 17.72 +23 18 39.1 r 379
2004-04-24 12:26:33 C 13 06 19.48 +23 19 12.1 r 379
2004-04-24 12:28:41 C 13 06 19.93 +23 19 20.8 r 379
2004-04-24 13:50:42 C 13 06 36.64 +23 24 36.9 r 379
2004-04-24 22:00:18 C 13 08 42.63 +23 54 44.8 o 084
2004-04-25 13:19:48 C 13 13 00.32 +24 57 02.2 r 379
2004-04-25 13:21:26 C 13 13 00.71 +24 57 09.2 r 379
2004-04-25 13:23:06 C 13 13 01.07 +24 57 15.8 r 379
2004-04-25 13:24:44 C 13 13 01.44 +24 57 22.2 r 379
2004-04-25 14:04:32 C 13 13 10.75 +25 00 03.8 r 379
2004-04-25 14:14:27 C 13 13 13.04 +25 00 43.6 r 379
2004-04-25 15:00:50 C 13 13 23.64 +25 03 45.8 355
2004-04-25 15:02:19 C 13 13 24.01 +25 03 52.5 355
2004-04-25 15:03:49 C 13 13 24.35 +25 03 58.0 355
2004-04-25 15:06:59 C 13 13 25.13 +25 04 10.4 355
2004-04-25 15:08:21 C 13 13 25.45 +25 04 15.7 355
2004-04-25 15:10:20 C 13 13 25.90 +25 04 23.9 355
2004-04-25 21:38:17 C 13 15 23.40 +25 29 37.0 o 084
2004-04-26 21:22:19 C 13 22 55.81 +27 10 28.9 o 084
2004-04-26 23:44:04 C 13 23 41.669 +27 21 59.35 r 620
2004-04-26 23:45:06 C 13 23 41.959 +27 22 03.75 r 620
2004-04-26 23:46:07 C 13 23 42.250 +27 22 08.13 r 620
2004-04-27 00:28:53 C 13 23 54.593 +27 25 11.38 r 620
2004-04-27 00:29:56 C 13 23 54.897 +27 25 15.86 r 620
2004-04-27 00:30:56 C 13 23 55.188 +27 25 20.16 r 620
2004-04-27 00:41:11 C 13 23 58.177 +27 26 03.75 r 620
2004-04-27 00:42:22 C 13 23 58.529 +27 26 08.79 r 620
2004-04-27 00:43:32 C 13 23 58.837 +27 26 13.61 r 620
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)