481817 (2008 UL90)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3798991584 ± 2.13e-08
Semi-major axis (a)0.6950164942 AU ± 3.13e-09
Inclination (i)24.31071456° ± 3.75e-06
Long. of Asc. Node (Ω)81.12167332° ± 2.11e-06
Arg. of Perihelion (ω)183.66335876° ± 1.76e-05
Mean Anomaly (M)322.83845913° ± 4.92e-05
Mean Motion (n)1.7010599084°/day ± 1.15e-08
Perihelion dist (q)0.43098031 AU ± 1.50e-08
Aphelion dist (Q)0.95905268 AU ± 1.54e-08
Orbital Period0.57941891 yr ± 3.92e-09
Physical Parameters
H (abs. magnitude)18.48
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.441″
Uncertainty0
Orbit TypeAtira
MOID0.027203 AU
Observations Used414
Radar Obs Used6
Oppositions6
Arc Total2008-2023
First Observation Used2008-10-26
Last Observation Used2023-12-24
Observations (536)
Date Type RA Dec Mag Band Observatory
2008-10-26 11:40:18 C 09 52 04.65 +07 58 26.2 r G96
2008-10-26 11:46:45 C 09 52 05.48 +07 58 30.2 r G96
2008-10-26 11:53:18 C 09 52 06.38 +07 58 33.1 r G96
2008-10-26 11:59:42 C 09 52 07.28 +07 58 36.3 r G96
2008-10-26 12:29:52 C 09 52 11.38 +07 58 49.8 r G96
2008-10-26 12:30:38 C 09 52 11.49 +07 58 50.5 r G96
2008-10-26 12:31:28 C 09 52 11.64 +07 58 50.8 r G96
2008-10-26 12:32:15 C 09 52 11.71 +07 58 50.9 r G96
2008-10-27 11:56:07 C 09 55 29.53 +08 09 31.9 v H01
2008-10-27 11:57:19 C 09 55 29.72 +08 09 32.4 v H01
2008-10-27 12:00:07 C 09 55 30.13 +08 09 33.6 v H01
2008-10-28 04:57:16 C 09 57 55.17 +08 17 12.9 r J95
2008-10-28 05:07:49 C 09 57 56.57 +08 17 17.3 r J95
2008-10-28 05:18:42 C 09 57 58.13 +08 17 23.6 r J95
2008-10-28 05:27:16 C 09 57 59.37 +08 17 26.6 r J95
2008-10-28 05:31:29 C 09 58 00.00 +08 17 29.0 r J95
2008-10-28 11:28:51 C 09 58 51.62 +08 20 13.9 v H01
2008-10-28 11:31:52 C 09 58 52.05 +08 20 15.4 v H01
2008-10-28 11:38:31 C 09 58 53.00 +08 20 18.3 r G96
2008-10-28 11:41:47 C 09 58 53.44 +08 20 19.9 v H01
2008-10-28 11:45:37 C 09 58 54.04 +08 20 21.3 r G96
2008-10-28 11:49:33 C 09 58 54.56 +08 20 23.4 v H01
2008-10-28 11:52:47 C 09 58 55.02 +08 20 25.4 r G96
2008-10-28 12:00:06 C 09 58 56.10 +08 20 28.3 r G96
2008-10-28 12:28:13 C 09 59 00.11 +08 20 41.9 o 291
2008-10-28 12:33:33 C 09 59 00.84 +08 20 44.4 o 291
2008-10-28 12:38:51 C 09 59 01.54 +08 20 46.4 o 291
2008-10-29 05:29:17 C 10 01 27.98 +08 28 19.9 r J95
2008-10-29 05:37:45 C 10 01 29.18 +08 28 23.1 r J95
2008-10-29 11:27:23 C 10 02 20.54 +08 31 04.4 r G96
2008-10-29 11:33:57 C 10 02 21.51 +08 31 07.4 r G96
2008-10-29 11:40:27 C 10 02 22.41 +08 31 10.3 r G96
2008-10-29 11:47:04 C 10 02 23.38 +08 31 13.4 r G96
2008-10-31 10:25:22 C 10 09 19.34 +08 52 07.1 18.5 c 704
2008-10-31 10:42:22 C 10 09 21.81 +08 52 15.9 19.2 c 704
2008-10-31 11:16:27 C 10 09 26.95 +08 52 30.5 19.2 c 704
2008-10-31 11:33:24 C 10 09 29.44 +08 52 39.1 19.6 c 704
2008-11-01 11:36:37 C 10 13 09.01 +09 03 20.3 r G96
2008-11-01 11:54:32 C 10 13 11.74 +09 03 28.4 r G96
2008-11-01 12:12:51 C 10 13 14.48 +09 03 36.6 r G96
2008-11-01 12:30:54 C 10 13 17.22 +09 03 44.7 r G96
2008-11-04 11:25:28 C 10 24 25.48 +09 34 49.6 r 448
2008-11-04 11:50:05 C 10 24 29.41 +09 34 59.3 r 448
2008-11-04 12:13:11 C 10 24 33.03 +09 35 10.4 r 448
2008-11-07 09:50:34 C 10 36 00.97 +10 04 52.2 r 448
2008-11-07 10:16:45 C 10 36 05.27 +10 05 03.2 r 448
2008-11-07 10:42:55 C 10 36 09.61 +10 05 15.4 r 448
2008-11-08 10:13:35 C 10 40 09.41 +10 15 01.8 r 448
2008-11-11 11:07:17 C 10 52 56.62 +10 44 40.7 r 448
2008-11-11 11:32:53 C 10 53 01.15 +10 44 51.7 r 448
Radar Observations (7)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2016-12-15 00:50:00 -326524.064 0.2 Hz 8560 -14 -14
2016-12-15 01:10:00 43175297.41 10 us 8560 -14 -14
2016-12-15 01:50:00 43268581.03 0.5 us 8560 -14 -14
2016-12-16 02:50:00 47209501.43 0.5 us 8560 -14 -14
2016-12-18 01:50:00 -555034.482 0.05 Hz 8560 -14 -14
2016-12-19 19:49:00 -167418.5466 0.017 Hz 2380 -1 -1
2016-12-20 21:03:00 73573145.98 0.5 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)