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
2004-04-28 21:30:54 C 13 41 21.85 +30 52 42.6 r 557
2004-04-28 21:33:01 C 13 41 24.57 +30 53 03.8 r A16
2004-04-28 21:36:17 C 13 41 25.76 +30 53 19.7 r A16
2004-04-28 21:39:33 C 13 41 26.99 +30 53 36.2 r A16
2004-04-28 21:42:47 C 13 41 28.26 +30 53 52.2 r A16
2004-04-28 21:47:08 C 13 41 29.88 +30 54 13.3 r A16
2004-04-28 21:52:36 C 13 41 31.95 +30 54 40.3 r A16
2004-04-28 22:02:53 C 13 41 34.03 +30 55 18.5 r 557
2004-04-28 22:30:38 C 13 41 44.60 +30 57 32.5 r 557
2004-04-28 23:00:19 C 13 41 55.95 +30 59 54.8 r 557
2004-04-28 23:30:55 C 13 42 07.73 +31 02 20.3 r 557
2004-04-29 00:00:38 C 13 42 19.27 +31 04 40.4 r 557
2004-04-29 00:30:50 C 13 42 31.11 +31 07 01.6 r 557
2004-04-29 01:00:16 C 13 42 42.80 +31 09 18.2 r 557
2004-04-29 01:30:33 C 13 42 54.99 +31 11 37.9 r 557
2004-04-29 02:00:24 C 13 43 07.20 +31 13 55.0 r 557
2004-04-29 09:53:48 C 13 46 50.04 +31 55 14.5 F65
2004-04-29 09:56:07 C 13 46 50.91 +31 55 25.7 F65
2004-04-29 09:58:07 C 13 46 51.68 +31 55 35.6 F65
2004-04-29 13:03:23 C 13 48 05.06 +32 10 08.5 F65
2004-04-29 13:05:05 C 13 48 05.78 +32 10 16.6 F65
2004-04-29 13:07:41 C 13 48 06.88 +32 10 28.2 F65
2004-04-29 13:10:06 C 13 48 07.90 +32 10 39.3 F65
2004-04-29 13:24:09 C 13 48 13.78 +32 11 43.0 F65
2004-04-29 13:37:22 C 13 48 37.03 +32 12 40.7 r 379
2004-04-29 13:39:31 C 13 48 37.93 +32 12 52.2 r 379
2004-04-29 13:43:56 C 13 48 22.28 +32 13 12.2 F65
2004-04-29 13:46:12 C 13 48 23.22 +32 13 22.1 F65
2004-04-29 13:48:06 C 13 48 41.36 +32 13 35.4 r 379
2004-04-29 13:59:00 C 13 48 45.72 +32 14 29.2 r 379
2004-04-29 14:01:09 C 13 48 46.58 +32 14 39.9 r 379
2004-04-29 14:03:19 C 13 48 47.47 +32 14 51.5 r 379
2004-04-29 14:05:28 C 13 48 48.33 +32 15 01.9 r 379
2004-04-30 10:56:23 C 13 59 05.91 +34 01 06.5 F65
2004-04-30 10:57:24 C 13 59 06.35 +34 01 11.4 F65
2004-04-30 14:01:53 C 14 00 32.63 +34 15 48.9 F65
2004-04-30 14:05:09 C 14 00 34.22 +34 16 03.9 F65
2004-04-30 14:17:20 C 14 00 40.34 +34 16 58.4 F65
2004-05-01 04:31:41 C 14 08 53.16 +35 30 17.6 o H97
2004-05-01 05:02:31 C 14 09 08.92 +35 32 56.3 o H97
2004-05-01 05:31:17 C 14 09 23.62 +35 35 22.7 o H97
2004-05-02 05:59:17 C 14 24 43.75 +37 43 43.2 14.7 c 704
2004-05-02 06:13:46 C 14 24 52.20 +37 45 00.6 15.0 c 704
2004-05-02 06:28:07 C 14 25 00.54 +37 46 16.6 15.0 c 704
2004-05-02 06:42:33 C 14 25 08.94 +37 47 32.5 15.1 c 704
2004-05-02 06:56:54 C 14 25 17.27 +37 48 47.4 15.0 c 704
2004-05-03 05:22:21 C 14 41 10.82 +39 45 00.5 r H41
2004-05-03 05:24:57 C 14 41 12.52 +39 45 13.8 r H41
2004-05-03 05:26:48 C 14 41 13.75 +39 45 23.8 r H41
2004-05-03 05:28:20 C 14 41 14.77 +39 45 31.8 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)