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
2024-11-12 05:15:47 C 03 28 10.988 +39 03 26.82 V G96
2024-11-12 05:23:54 C 03 28 10.830 +39 03 30.28 V G96
2024-11-12 05:32:02 C 03 28 10.697 +39 03 34.42 V G96
2024-11-20 09:03:30 C 03 25 00.599 +40 06 31.75 V G96
2024-11-20 09:10:55 C 03 25 00.433 +40 06 33.34 V G96
2024-11-20 09:18:19 C 03 25 00.239 +40 06 34.85 V G96
2024-11-20 09:25:43 C 03 25 00.059 +40 06 36.43 V G96
2024-12-05 09:08:09 C 03 20 49.236 +40 36 43.48 X F52
2024-12-05 09:23:57 C 03 20 49.068 +40 36 41.97 X F52
2024-12-05 09:39:48 C 03 20 48.901 +40 36 40.38 X F52
2024-12-05 09:55:31 C 03 20 48.737 +40 36 38.72 X F52
2024-12-19 06:26:33 C 03 27 35.658 +39 21 31.28 V G96
2024-12-19 06:33:19 C 03 27 35.896 +39 21 28.80 V G96
2024-12-19 06:40:05 C 03 27 36.119 +39 21 26.14 V G96
2024-12-19 06:46:51 C 03 27 36.338 +39 21 23.65 V G96
2024-12-22 06:13:01 C 03 31 07.335 +38 54 23.57 X F51
2024-12-22 06:31:31 C 03 31 08.142 +38 54 16.68 X F51
2024-12-22 06:49:55 C 03 31 08.936 +38 54 09.71 X F51
2024-12-26 22:47:30 B 03 38 08.885 +38 04 43.54 Z C95
2024-12-26 22:55:43 B 03 38 09.439 +38 04 39.04 Z C95
2024-12-26 23:03:57 B 03 38 09.984 +38 04 34.97 Z C95
2024-12-29 21:21:30 B 03 43 34.37 +37 29 55.3 X 122
2024-12-29 21:38:33 B 03 43 35.62 +37 29 46.2 X 122
2024-12-29 21:54:59 B 03 43 36.83 +37 29 37.5 X 122
2024-12-30 01:44:31 C 03 43 57.760 +37 27 43.13 V G96
2024-12-30 01:52:32 C 03 43 58.364 +37 27 39.28 V G96
2024-12-30 02:00:35 C 03 43 58.940 +37 27 35.39 V G96
2025-01-05 05:32:33 C 03 57 45.390 +36 06 14.75 X F51
2025-01-05 05:50:29 C 03 57 47.071 +36 06 04.84 X F51
2025-01-05 06:08:22 C 03 57 48.739 +36 05 54.86 X F51
2025-01-05 06:26:20 C 03 57 50.411 +36 05 44.69 X F51
2025-01-18 14:34:24 C 04 36 47.27 +32 36 44.9 V D29
2025-01-18 15:29:54 C 04 36 54.40 +32 36 04.0 V D29
2025-01-20 06:48:19 C 04 42 18.601 +32 07 55.24 V V00
2025-01-20 06:49:13 C 04 42 18.724 +32 07 54.52 V V00
2025-01-20 06:56:26 C 04 42 19.667 +32 07 49.08 V V00
2025-01-20 06:57:19 C 04 42 19.789 +32 07 48.29 V V00
2025-01-20 07:04:30 C 04 42 20.736 +32 07 42.85 V V00
2025-01-20 07:05:24 C 04 42 20.848 +32 07 42.10 V V00
2025-01-20 07:12:35 C 04 42 21.798 +32 07 36.66 V V00
2025-01-20 07:13:29 C 04 42 21.920 +32 07 35.90 V V00
2025-01-22 04:32:05 C 04 48 43.729 +31 34 40.48 V G96
2025-01-22 04:40:24 C 04 48 44.870 +31 34 34.54 V G96
2025-01-22 04:48:37 C 04 48 45.929 +31 34 28.24 V G96
2025-01-22 04:56:50 C 04 48 47.020 +31 34 22.26 V G96
2025-03-01 03:32:02 C 06 59 54.791 +20 16 48.18 V G96
2025-03-01 03:40:23 C 06 59 55.864 +20 16 42.35 V G96
2025-03-01 03:48:43 C 06 59 56.908 +20 16 37.09 V G96
2025-03-01 03:57:03 C 06 59 58.016 +20 16 30.90 V G96