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
2016-12-30 00:46:54 C 22 03 58.73 +30 00 23.6 q H45
2016-12-30 00:48:32 C 22 03 58.77 +30 00 26.7 q H45
2016-12-30 00:49:42 C 22 03 58.81 +30 00 29.2 q H45
2016-12-30 00:50:53 C 22 03 58.87 +30 00 31.3 q H45
2016-12-30 00:52:03 C 22 03 58.90 +30 00 33.6 q H45
2016-12-31 01:11:39 C 22 04 58.12 +30 47 20.1 q H45
2016-12-31 01:13:14 C 22 04 58.17 +30 47 23.3 q H45
2016-12-31 01:15:00 C 22 04 58.21 +30 47 26.2 q H45
2016-12-31 01:16:20 C 22 04 58.25 +30 47 28.5 q H45
2016-12-31 01:17:41 C 22 04 58.28 +30 47 30.8 q H45
2016-12-31 01:18:39 C 22 04 58.33 +30 47 32.5 q H45
2016-12-31 17:24:17 C 22 05 34.60 +31 15 43.9 q 160
2016-12-31 17:26:19 C 22 05 34.62 +31 15 47.0 q 160
2016-12-31 17:28:14 C 22 05 34.65 +31 15 50.1 q 160
2017-01-01 22:39:15 C 22 06 31.40 +32 02 15.7 q I15
2017-01-01 22:41:51 C 22 06 31.41 +32 02 20.1 q I15
2017-01-01 22:44:28 C 22 06 31.48 +32 02 24.0 q I15
2017-01-02 20:25:24 C 22 07 07.37 +32 33 01.1 q Z80
2017-01-02 20:28:45 C 22 07 07.49 +32 33 05.7 q Z80
2017-01-02 20:32:28 C 22 07 07.59 +32 33 10.1 q Z80
2017-01-03 17:11:56 C 22 07 38.78 +33 00 22.8 q 160
2017-01-03 17:13:53 C 22 07 38.83 +33 00 24.9 q 160
2017-01-03 17:15:50 C 22 07 38.85 +33 00 27.1 q 160
2017-01-04 05:13:07 C 22 07 53.76 +33 15 16.2 L T05
2017-01-04 05:27:02 C 22 07 53.98 +33 15 31.3 L T05
2017-01-04 05:42:50 C 22 07 54.21 +33 15 47.8 L T05
2017-01-04 05:58:54 C 22 07 54.34 +33 16 07.0 L T05
2017-01-05 00:26:39 C 22 08 17.69 +33 37 07.1 q H45
2017-01-05 00:29:00 C 22 08 17.73 +33 37 09.5 q H45
2017-01-05 00:30:49 C 22 08 17.74 +33 37 11.6 q H45
2017-01-05 00:32:18 C 22 08 17.78 +33 37 12.8 q H45
2017-01-05 00:33:46 C 22 08 17.80 +33 37 14.5 q H45
2017-01-05 00:35:12 C 22 08 17.80 +33 37 16.2 q H45
2017-01-06 17:17:23 C 22 08 58.16 +34 18 28.8 q 160
2017-01-06 17:20:19 C 22 08 58.16 +34 18 31.1 q 160
2017-01-06 17:23:16 C 22 08 58.15 +34 18 33.3 q 160
2017-01-07 23:44:38 C 22 09 20.03 +34 45 18.1 q W34
2017-01-08 00:06:46 C 22 09 20.02 +34 45 35.0 q W34
2017-01-08 00:15:42 C 22 09 20.06 +34 45 41.0 q W34
2017-01-08 00:41:20 C 22 09 20.45 +34 46 04.0 q H45
2017-01-08 00:43:30 C 22 09 20.45 +34 46 05.4 q H45
2017-01-08 00:45:36 C 22 09 20.46 +34 46 06.8 q H45
2017-01-08 00:47:35 C 22 09 20.47 +34 46 08.5 q H45
2017-01-08 00:49:12 C 22 09 20.47 +34 46 09.8 q H45
2017-01-08 00:50:44 C 22 09 20.48 +34 46 10.8 q H45
2017-01-09 00:20:46 C 22 09 33.55 +35 04 37.5 q H45
2017-01-09 00:22:44 C 22 09 33.56 +35 04 38.8 q H45
2017-01-09 00:24:47 C 22 09 33.56 +35 04 40.2 q H45
2017-01-09 00:26:33 C 22 09 33.56 +35 04 41.0 q H45
2017-01-09 00:28:18 C 22 09 33.58 +35 04 42.5 q H45
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)