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
2008-11-11 11:51:44 C 10 53 04.49 +10 45 00.0 r 448
2008-11-23 11:14:18 C 11 50 02.35 +12 21 43.3 o H55
2008-11-23 11:21:55 C 11 50 03.97 +12 21 44.9 o H55
2008-11-23 11:29:24 C 11 50 05.57 +12 21 47.1 o H55
2008-11-24 11:10:43 C 11 55 16.61 +12 27 42.5 r 448
2008-11-24 11:42:35 C 11 55 23.68 +12 27 48.9 r 448
2008-11-25 05:18:43 C 11 59 17.42 +12 31 53.9 r J95
2008-11-25 05:26:46 C 11 59 19.26 +12 31 55.0 r J95
2008-12-02 12:20:55 C 12 40 13.58 +12 57 47.8 r 703
2008-12-02 12:27:19 C 12 40 15.16 +12 57 48.7 r 703
2008-12-02 12:33:45 C 12 40 16.78 +12 57 50.9 r 703
2008-12-07 04:09:08 C 13 08 14.17 +12 56 28.3 r J95
2008-12-07 04:15:31 C 13 08 15.88 +12 56 27.2 r J95
2008-12-07 04:22:13 C 13 08 17.53 +12 56 26.6 r J95
2008-12-17 05:50:59 C 14 12 10.29 +11 51 51.9 r J95
2008-12-17 05:57:55 C 14 12 12.14 +11 51 49.0 r J95
2008-12-17 06:04:51 C 14 12 14.02 +11 51 45.7 r J95
2009-01-03 05:46:14 C 16 00 30.10 +06 34 14.6 r J95
2009-01-03 06:11:14 C 16 00 36.41 +06 33 47.9 r J95
2009-12-14 12:07:43 C 22 46 23.75 -30 41 26.3 v D90
2009-12-14 12:11:47 C 22 46 24.65 -30 41 08.4 v D90
2009-12-14 12:15:51 C 22 46 25.42 -30 40 49.0 v D90
2009-12-26 01:20:31 C 23 31 06.48 -11 14 41.5 r 448
2009-12-26 01:33:18 C 23 31 08.00 -11 13 52.2 r 448
2009-12-26 01:42:08 C 23 31 09.06 -11 13 18.1 r 448
2009-12-26 03:04:08 C 23 31 18.78 -11 08 03.9 o 291
2009-12-26 03:09:52 C 23 31 19.43 -11 07 42.4 o 291
2009-12-26 03:17:11 C 23 31 20.31 -11 07 13.8 o 291
2009-12-27 02:18:36 C 23 34 07.80 -09 40 15.9 o 291
2009-12-27 02:24:50 C 23 34 08.43 -09 39 52.8 r 448
2009-12-27 02:25:33 C 23 34 08.56 -09 39 50.4 o 291
2009-12-27 02:34:06 C 23 34 09.45 -09 39 18.4 r 448
2009-12-27 02:42:28 C 23 34 10.44 -09 38 46.9 r 448
2009-12-27 03:39:48 C 23 34 16.94 -09 35 12.2 o 291
2009-12-28 00:53:15 C 23 36 45.50 -08 16 52.9 u 932
2009-12-28 01:02:15 C 23 36 46.46 -08 16 20.1 u 932
2009-12-28 01:12:07 C 23 36 47.58 -08 15 43.5 u 932
2012-11-01 08:28:58 C 09 56 48.26 -07 13 43.4 u 807
2012-11-01 08:35:01 C 09 56 48.77 -07 13 37.4 u 807
2012-11-01 08:41:06 C 09 56 49.28 -07 13 31.3 u 807
2012-11-01 08:47:10 C 09 56 49.79 -07 13 25.2 u 807
2012-11-01 08:52:36 C 09 56 50.24 -07 13 19.8 u 807
2012-11-24 11:40:32 C 11 11 00.52 +04 29 51.0 r 703
2012-11-24 11:50:29 C 11 11 02.43 +04 30 07.5 r 703
2012-11-24 12:00:19 C 11 11 04.23 +04 30 23.3 r 703
2012-11-24 12:10:14 C 11 11 06.10 +04 30 39.8 r 703
2012-12-02 11:49:56 C 11 53 31.70 +10 07 08.1 r 703
2012-12-02 11:57:16 C 11 53 33.39 +10 07 20.4 r 703
2012-12-02 12:04:38 C 11 53 35.30 +10 07 35.2 r 703
2012-12-02 12:16:31 C 11 53 38.18 +10 07 58.4 r 703
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)