2021 UK9

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4160639561 ± 7.23e-08
Semi-major axis (a)2.0379955327 AU ± 2.54e-08
Inclination (i)5.35985673° ± 2.56e-06
Long. of Asc. Node (Ω)315.66605914° ± 3.08e-05
Arg. of Perihelion (ω)149.06210151° ± 4.90e-05
Mean Anomaly (M)105.31773063° ± 8.51e-06
Mean Motion (n)0.3387719427°/day ± 6.34e-09
Perihelion dist (q)1.19005905 AU ± 1.48e-07
Aphelion dist (Q)2.88593202 AU ± 1.52e-07
Orbital Period2.90940943 yr ± 5.44e-08
Physical Parameters
H (abs. magnitude)21.06
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.179″
Uncertainty0
Orbit TypeAmor
MOID0.212151 AU
Observations Used96
Oppositions5
Arc Total2018-2025
First Observation Used2018-09-08
Last Observation Used2025-03-01
Observations (99)
Date Type RA Dec Mag Band Observatory
2018-09-08 04:20:49 C 23 32 30.846 +03 32 10.29 V W84
2018-09-14 03:26:27 C 23 24 46.906 +03 08 56.33 V W84
2018-09-14 03:28:13 C 23 24 46.817 +03 08 56.30 V W84
2021-10-31 05:25:18 C 23 55 30.930 +12 42 29.07 U F51
2021-10-31 05:43:23 C 23 55 30.150 +12 42 24.63 U F51
2021-10-31 06:01:29 C 23 55 29.365 +12 42 20.35 U F51
2021-10-31 06:19:52 C 23 55 28.563 +12 42 15.95 U F51
2021-10-31 08:53:50 C 23 55 21.860 +12 41 37.89 V F51
2021-10-31 08:54:46 C 23 55 21.820 +12 41 37.65 V F51
2021-11-01 02:01:25 C 23 54 42.13 +12 37 21.2 u H21
2021-11-01 02:10:45 C 23 54 41.74 +12 37 20.0 u H21
2021-11-01 02:34:17 C 23 54 41.17 +12 37 14.6 V I52
2021-11-01 02:40:46 C 23 54 40.89 +12 37 12.9 V I52
2021-11-01 02:49:56 C 23 54 40.45 +12 37 11.1 V I52
2021-11-01 02:58:31 C 23 54 40.14 +12 37 08.5 V I52
2021-11-02 03:23:49 C 23 53 45.39 +12 31 13.2 o 691
2021-11-02 03:48:48 C 23 53 44.39 +12 31 07.2 o 691
2021-11-03 02:43:54 C 23 52 55.84 +12 25 37.6 u H21
2021-11-03 03:07:38 C 23 52 54.97 +12 25 31.5 u H21
2021-11-03 03:31:33 C 23 52 54.07 +12 25 26.0 u H21
2021-11-03 03:35:27 C 23 52 53.93 +12 25 25.2 u H21
2021-11-07 01:36:21 C 23 50 05.76 +12 04 03.4 u H21
2021-11-07 01:47:27 C 23 50 05.43 +12 04 00.1 u H21
2021-11-07 01:58:15 C 23 50 05.10 +12 03 58.5 u H21
2021-11-12 01:14:13 C 23 47 44.73 +11 40 41.5 V 807
2021-11-12 01:22:11 C 23 47 44.58 +11 40 40.0 V 807
2021-11-12 01:30:10 C 23 47 44.45 +11 40 38.0 V 807
2021-11-23 00:26:54 C 23 47 38.01 +11 08 09.9 u H21
2021-11-23 00:42:58 C 23 47 38.16 +11 08 08.5 u H21
2021-12-02 04:31:36 C 23 52 47.49 +11 05 47.4 V V06
2021-12-02 04:44:22 C 23 52 47.87 +11 05 48.3 V V06
2021-12-02 05:19:37 C 23 52 49.02 +11 05 49.5 V V06
2021-12-09 00:58:11 C 23 59 38.23 +11 19 40.8 u H21
2021-12-09 01:14:17 C 23 59 38.95 +11 19 42.8 u H21
2021-12-09 01:29:52 C 23 59 39.68 +11 19 44.8 u H21
2022-01-30 04:35:57 C 02 00 09.30 +18 33 16.5 V V06
2022-01-30 04:46:14 C 02 00 10.73 +18 33 20.6 V V06
2024-09-14 12:01:19 C 02 56 03.459 +26 09 34.66 V F52
2024-09-14 12:16:40 C 02 56 04.187 +26 09 43.59 V F52
2024-09-14 12:31:58 C 02 56 04.923 +26 09 52.34 V F52
2024-09-14 12:47:18 C 02 56 05.675 +26 10 00.79 V F52
2024-10-01 09:08:02 C 03 14 45.262 +29 59 22.45 V V06
2024-10-01 09:13:46 C 03 14 45.460 +29 59 25.76 V V06
2024-10-01 09:19:28 C 03 14 45.676 +29 59 29.11 V V06
2024-10-01 09:25:12 C 03 14 45.874 +29 59 32.53 V V06
2024-10-26 06:33:09 C 03 29 41.622 +35 45 09.97 V G96
2024-10-26 06:40:39 C 03 29 41.654 +35 45 14.40 V G96
2024-10-26 06:48:09 C 03 29 41.669 +35 45 18.76 V G96
2024-10-26 06:55:40 C 03 29 41.716 +35 45 23.18 V G96
2024-11-12 05:07:38 C 03 28 11.172 +39 03 24.19 V G96