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
2023-12-10 12:33:15 C 12 38 26.628 +15 15 04.75 V 703
2023-12-10 12:36:15 C 12 38 27.589 +15 15 12.20 V 703
2023-12-10 12:39:14 C 12 38 28.525 +15 15 19.80 V 703
2023-12-11 14:15:05 C 12 47 07.565 +16 20 58.20 V T05
2023-12-11 14:22:38 C 12 47 10.094 +16 21 17.46 V T05
2023-12-11 14:27:13 C 12 47 11.611 +16 21 29.41 V T05
2023-12-11 14:44:35 C 12 47 17.484 +16 22 14.81 V T05
2023-12-12 13:54:52 C 12 55 22.884 +17 21 17.03 V T05
2023-12-12 13:59:26 C 12 55 24.410 +17 21 28.87 V T05
2023-12-12 14:15:49 C 12 55 30.230 +17 22 11.39 V T05
2023-12-12 14:29:15 C 12 55 34.764 +17 22 45.77 V T05
2023-12-15 12:18:18 C 13 21 23.008 +20 16 08.04 V 703
2023-12-15 12:21:38 C 13 21 24.354 +20 16 16.61 V 703
2023-12-15 12:24:58 C 13 21 25.567 +20 16 24.31 V 703
2023-12-15 12:28:18 C 13 21 26.831 +20 16 33.46 V 703
2023-12-15 14:07:54 C 13 22 05.899 +20 20 36.56 V T05
2023-12-15 14:13:06 C 13 22 07.939 +20 20 49.02 V T05
2023-12-15 14:33:51 C 13 22 15.725 +20 21 40.75 V T05
2023-12-15 14:44:30 C 13 22 19.786 +20 22 06.17 V T05
2023-12-15 15:29:45 C 13 22 36.871 +20 23 58.16 V T05
2023-12-16 12:42:22 C 13 30 52.384 +21 14 05.93 V 703
2023-12-16 12:45:20 C 13 30 53.593 +21 14 11.83 V 703
2023-12-16 12:48:18 C 13 30 54.662 +21 14 19.00 V 703
2023-12-16 12:51:16 C 13 30 55.775 +21 14 26.02 V 703
2023-12-16 14:43:18 C 13 31 40.733 +21 18 52.56 V T05
2023-12-16 14:47:52 C 13 31 42.454 +21 19 02.75 V T05
2023-12-16 15:09:50 C 13 31 50.945 +21 19 54.73 V T05
2023-12-16 15:27:48 C 13 31 57.866 +21 20 37.57 V T05
2023-12-17 15:00:02 C 13 41 21.017 +22 14 20.72 V T08
2023-12-17 15:05:22 C 13 41 23.122 +22 14 32.86 V T08
2023-12-17 15:17:37 C 13 41 27.979 +22 15 00.97 V T08
2023-12-17 15:44:05 C 13 41 38.390 +22 16 01.02 V T08
2023-12-24 14:43:46 C 14 51 44.270 +27 15 57.13 V T05
2023-12-24 14:48:24 C 14 51 46.241 +27 16 03.90 V T05
2023-12-24 15:04:31 C 14 51 53.030 +27 16 24.85 V T05
2023-12-24 15:14:01 C 14 51 57.012 +27 16 38.03 V T05
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)