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
2016-12-20 00:28:35 C 21 42 16.46 +12 50 40.2 q H45
2016-12-20 00:29:38 C 21 42 16.61 +12 50 49.0 q H45
2016-12-20 01:11:08 C 21 42 22.46 +12 56 31.6 q W25
2016-12-20 02:30:41 C 21 42 35.71 +13 08 00.1 H06
2016-12-20 02:42:59 C 21 42 37.56 +13 09 43.1 H06
2016-12-21 00:22:55 C 21 46 05.06 +15 58 33.7 q H45
2016-12-21 00:24:54 C 21 46 05.32 +15 58 47.8 q H45
2016-12-21 00:25:57 C 21 46 05.43 +15 58 55.1 q H45
2016-12-21 00:26:45 C 21 46 05.54 +15 59 01.0 q H45
2016-12-21 00:27:55 C 21 46 05.68 +15 59 09.2 q H45
2016-12-21 00:29:01 C 21 46 05.82 +15 59 17.2 q H45
2016-12-21 00:30:03 C 21 46 05.95 +15 59 24.8 q H45
2016-12-21 00:31:09 C 21 46 06.07 +15 59 32.3 q H45
2016-12-21 02:22:54 C 21 46 20.98 +16 12 47.5 H06
2016-12-21 02:35:30 C 21 46 22.59 +16 14 15.3 H06
2016-12-22 00:29:02 C 21 49 21.39 +18 37 24.9 q H45
2016-12-22 00:30:55 C 21 49 21.59 +18 37 36.4 q H45
2016-12-22 00:32:53 C 21 49 21.80 +18 37 47.8 q H45
2016-12-22 00:33:58 C 21 49 21.91 +18 37 54.5 q H45
2016-12-22 00:35:14 C 21 49 22.04 +18 38 01.9 q H45
2016-12-22 00:36:17 C 21 49 22.15 +18 38 08.2 q H45
2016-12-22 00:37:19 C 21 49 22.26 +18 38 14.7 q H45
2016-12-22 00:38:21 C 21 49 22.37 +18 38 20.6 q H45
2016-12-22 17:45:19 C 21 51 25.09 +20 15 38.0 q 160
2016-12-22 17:47:17 C 21 51 25.28 +20 15 48.5 q 160
2016-12-22 17:49:20 C 21 51 25.48 +20 15 59.5 q 160
2016-12-22 18:29:26 C 21 51 29.64 +20 19 28.4 U 204
2016-12-22 18:32:55 C 21 51 29.98 +20 19 46.8 U 204
2016-12-22 18:35:45 C 21 51 30.25 +20 20 01.7 U 204
2016-12-22 18:38:34 C 21 51 30.53 +20 20 16.6 U 204
2016-12-22 18:41:42 C 21 51 30.84 +20 20 33.0 U 204
2016-12-23 04:46:18 C 21 52 36.51 +21 13 21.7 L T05
2016-12-23 04:51:30 C 21 52 36.91 +21 13 47.0 L T05
2016-12-23 05:00:24 C 21 52 37.71 +21 14 30.4 L T05
2016-12-23 05:13:02 C 21 52 38.79 +21 15 32.8 L T05
2016-12-23 18:07:34 C 21 53 58.45 +22 16 39.9 q 160
2016-12-23 18:09:39 C 21 53 58.62 +22 16 49.4 q 160
2016-12-23 18:11:45 C 21 53 58.78 +22 16 58.9 q 160
2016-12-27 20:04:11 C 22 01 20.12 +27 58 24.8 G40
2016-12-27 20:31:36 C 22 01 21.35 +27 59 33.9 G40
2016-12-28 00:06:52 C 22 01 35.01 +28 08 54.2 q H45
2016-12-28 00:08:12 C 22 01 35.07 +28 08 57.6 q H45
2016-12-28 00:09:28 C 22 01 35.11 +28 09 00.9 q H45
2016-12-28 00:11:00 C 22 01 35.18 +28 09 04.7 q H45
2016-12-28 00:12:15 C 22 01 35.24 +28 09 07.9 q H45
2016-12-28 00:13:31 C 22 01 35.29 +28 09 11.1 q H45
2016-12-28 16:54:25 C 22 02 29.51 +28 50 16.8 q 160
2016-12-28 16:56:15 C 22 02 29.59 +28 50 20.8 q 160
2016-12-28 16:58:06 C 22 02 29.65 +28 50 25.0 q 160
2016-12-30 00:45:16 C 22 03 58.68 +30 00 20.5 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)