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
2023-10-15 04:57:04 C 23 39 26.658 -03 45 37.48 V G96
2023-10-15 05:04:29 C 23 39 26.435 -03 45 39.46 V G96
2023-10-15 05:11:55 C 23 39 26.161 -03 45 41.47 V G96
2023-10-15 05:19:21 C 23 39 25.902 -03 45 43.74 V G96
2023-10-16 06:33:08 C 23 38 42.277 -03 52 15.18 X F52
2023-10-16 07:06:21 C 23 38 41.232 -03 52 23.52 X F52
2023-10-16 07:23:05 C 23 38 40.699 -03 52 27.78 X F52
2023-11-05 06:44:45 C 23 35 39.861 -04 33 10.90 X F51
2023-11-05 06:59:50 C 23 35 40.010 -04 33 10.11 X F51
2023-11-05 07:14:57 C 23 35 40.152 -04 33 09.11 X F51
2023-11-05 07:30:02 C 23 35 40.295 -04 33 08.29 X F51
2023-11-09 06:30:36 C 23 37 13.108 -04 25 08.79 X F52
2023-11-09 06:47:29 C 23 37 13.379 -04 25 06.87 X F52
2023-11-09 07:04:20 C 23 37 13.653 -04 25 05.02 X F52
2025-12-13 11:30:31 C 08 22 07.468 +15 15 08.46 X F52
2025-12-13 11:49:05 C 08 22 07.164 +15 15 07.77 X F52
2025-12-13 12:07:45 C 08 22 06.852 +15 15 06.80 X F52
2025-12-13 12:26:19 C 08 22 06.550 +15 15 06.01 X F52
2025-12-24 18:36:07 C 08 14 40.72 +15 16 18.6 V D29
2025-12-24 19:16:50 C 08 14 38.78 +15 16 22.7 V D29
2025-12-25 18:32:23 C 08 13 38.39 +15 17 48.9 V D29
2025-12-25 19:13:07 C 08 13 36.47 +15 17 51.7 V D29
2025-12-27 10:26:28 C 08 11 46.791 +15 20 52.77 X F51
2025-12-27 10:44:35 C 08 11 45.835 +15 20 54.37 X F51
2025-12-27 11:05:32 C 08 11 44.731 +15 20 56.16 X F51
2025-12-27 11:23:50 C 08 11 43.751 +15 20 58.03 X F51
2025-12-27 17:05:02 C 08 11 26.89 +15 21 23.8 V D29
2025-12-27 17:25:24 C 08 11 25.80 +15 21 25.9 V D29
2025-12-27 17:45:46 C 08 11 24.70 +15 21 27.5 V D29
2025-12-27 23:38:10 B 08 11 07.301 +15 21 55.43 W 204
2025-12-27 23:58:15 B 08 11 06.218 +15 21 57.07 W 204
2025-12-29 17:20:17 C 08 08 55.677 +15 25 59.62 W O18
2025-12-29 18:41:58 C 08 08 50.945 +15 26 08.68 W O18
2026-01-01 17:59:49 C 08 04 39.919 +15 34 39.63 W O18
2026-01-01 18:32:12 C 08 04 37.795 +15 34 44.02 W O18
2026-01-06 17:20:00 C 07 56 32.333 +15 53 02.47 W O18
2026-01-06 18:00:56 C 07 56 29.165 +15 53 09.94 W O18
2026-01-08 09:07:54 C 07 53 32.823 +16 00 17.94 X F51
2026-01-08 09:20:42 C 07 53 31.794 +16 00 20.36 X F51
2026-01-08 09:33:16 C 07 53 30.776 +16 00 22.87 X F51
2026-01-08 09:46:02 C 07 53 29.742 +16 00 25.33 X F51
2026-01-09 08:27:49 C 07 51 44.011 +16 04 43.60 X F52
2026-01-09 08:42:40 C 07 51 42.793 +16 04 46.64 X F52
2026-01-09 08:57:35 C 07 51 41.559 +16 04 49.63 X F52
2026-01-09 09:12:30 C 07 51 40.326 +16 04 52.68 X F52
2026-01-09 15:38:25 C 07 51 09.923 +16 06 02.47 W O18
2026-01-09 16:27:25 C 07 51 05.869 +16 06 12.56 W O18
2026-01-10 15:37:30 C 07 49 14.29 +16 10 50.2 V D29
2026-01-10 15:57:51 C 07 49 12.53 +16 10 53.7 V D29
2026-01-10 16:18:13 C 07 49 10.82 +16 10 58.9 V D29
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)