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
2017-01-09 00:29:55 C 22 09 33.58 +35 04 43.8 q H45
2018-03-29 03:03:49 C 03 19 33.01 +31 13 15.1 U G96
2018-03-29 03:10:44 C 03 19 33.78 +31 13 20.9 U G96
2018-03-29 03:17:39 C 03 19 34.56 +31 13 27.6 U G96
2018-03-29 03:24:33 C 03 19 35.35 +31 13 34.3 U G96
2019-12-04 13:34:47 C 12 42 11.78 +13 17 26.4 V T08
2019-12-04 13:40:15 C 12 42 13.08 +13 17 24.9 V T08
2019-12-04 13:47:47 C 12 42 14.94 +13 17 27.5 V T08
2019-12-04 14:02:51 C 12 42 18.74 +13 17 29.8 V T08
2020-12-25 05:50:51 C 23 27 26.233 -13 58 38.67 U F51
2020-12-25 06:05:48 C 23 27 28.208 -13 57 43.47 U F51
2020-12-29 05:06:15 C 23 39 40.20 -08 21 20.7 V T08
2020-12-29 05:11:36 C 23 39 40.81 -08 21 02.4 V T08
2020-12-29 05:22:19 C 23 39 42.01 -08 20 25.7 V T08
2020-12-29 05:36:24 C 23 39 43.62 -08 19 36.9 V T08
2021-01-03 03:14:32 C 23 52 42.00 -02 00 53.9 V 703
2021-01-03 03:22:47 C 23 52 42.90 -02 00 29.2 V 703
2021-01-03 03:31:03 C 23 52 43.66 -02 00 04.0 V 703
2021-01-03 03:39:19 C 23 52 44.62 -01 59 38.9 V 703
2021-01-17 05:24:50 C 00 21 25.86 +12 28 17.8 V T05
2021-01-17 05:29:28 C 00 21 26.18 +12 28 27.0 V T05
2021-01-17 05:40:42 C 00 21 26.96 +12 28 51.5 V T05
2021-01-17 06:02:32 C 00 21 28.42 +12 29 37.8 V T05
2021-01-18 02:55:24 C 00 22 57.04 +13 13 58.8 V 703
2021-01-18 03:03:39 C 00 22 57.52 +13 14 15.0 V 703
2021-01-18 03:11:55 C 00 22 58.16 +13 14 32.4 V 703
2021-01-18 03:20:11 C 00 22 58.63 +13 14 49.3 V 703
2021-02-09 02:35:09 C 00 51 46.23 +27 47 29.8 V 703
2021-02-09 02:43:26 C 00 51 46.54 +27 47 41.0 V 703
2021-02-09 02:51:43 C 00 51 46.85 +27 47 51.0 V 703
2021-02-09 03:00:00 C 00 51 47.23 +27 48 02.2 V 703
2021-02-16 02:08:08 C 00 57 28.17 +31 06 44.4 V G96
2021-02-16 02:14:15 C 00 57 28.34 +31 06 50.9 V G96
2021-02-16 02:20:19 C 00 57 28.47 +31 06 57.6 V G96
2021-02-16 02:26:23 C 00 57 28.63 +31 07 03.8 V G96
2022-10-09 12:10:29 C 09 45 31.086 +15 56 24.79 V G96
2022-10-09 12:14:32 C 09 45 31.720 +15 56 24.90 V G96
2022-10-09 12:18:36 C 09 45 32.389 +15 56 24.90 V G96
2022-10-09 12:22:39 C 09 45 33.023 +15 56 24.54 V G96
2022-11-05 12:13:17 C 11 43 20.874 +12 59 27.56 V V00
2022-11-05 12:20:28 C 11 43 22.300 +12 59 23.86 V V00
2022-11-05 12:27:39 C 11 43 23.754 +12 59 20.18 V V00
2022-11-05 12:34:50 C 11 43 25.194 +12 59 16.22 V V00
2023-11-06 12:03:08 C 10 07 39.558 -09 36 01.80 V 703
2023-11-06 12:11:30 C 10 07 40.307 -09 35 51.86 V 703
2023-11-06 12:28:13 C 10 07 41.614 -09 35 31.78 V 703
2023-11-19 00:18:27 S 10 43 27.768 -02 54 09.97 V C57
2023-11-19 00:18:27 s 1 +148689.67 3 +302786.96 2690.0 C57
2023-11-19 00:58:27 S 10 43 33.768 -02 53 14.06 V C57
2023-11-19 00:58:27 s 1 +147375.06 2 +303150.38 5510.0 C57
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)