2021 UN20

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5506909560 ± 6.88e-06
Semi-major axis (a)2.3114766669 AU ± 3.66e-05
Inclination (i)2.29714723° ± 2.28e-05
Long. of Asc. Node (Ω)133.31548450° ± 3.67e-05
Arg. of Perihelion (ω)316.66775034° ± 4.64e-05
Mean Anomaly (M)40.53453036° ± 9.54e-03
Mean Motion (n)0.2804645694°/day ± 6.67e-06
Perihelion dist (q)1.03856737 AU ± 2.29e-05
Aphelion dist (Q)3.58438596 AU ± 5.90e-05
Orbital Period3.51426309 yr ± 8.35e-05
Physical Parameters
H (abs. magnitude)23.62
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.239″
Uncertainty1
Orbit TypeAmor
MOID0.060805 AU
Observations Used125
Oppositions1
Arc Total2021-2022
First Observation Used2021-10-30
Last Observation Used2022-02-11
Observations (126)
Date Type RA Dec Mag Band Observatory
2021-12-22 20:16:17 C 04 41 38.83 -03 17 56.4 V 033
2021-12-25 23:51:51 C 05 19 14.61 -01 17 38.5 V 033
2021-12-25 23:52:16 C 05 19 14.81 -01 17 38.0 V 033
2021-12-25 23:52:41 C 05 19 15.02 -01 17 37.2 V 033
2021-12-26 20:06:58 C 05 29 50.50 -00 41 47.9 Z K19
2021-12-26 20:22:47 C 05 29 58.37 -00 41 20.0 Z K19
2021-12-26 20:38:59 C 05 30 06.39 -00 40 51.1 Z K19
2021-12-27 21:46:11 C 05 43 11.39 +00 04 46.2 X C95
2021-12-27 21:58:13 C 05 43 17.40 +00 05 08.8 X C95
2021-12-27 22:10:15 C 05 43 23.33 +00 05 30.3 X C95
2021-12-28 05:10:51 C 05 46 59.65 +00 21 09.0 u 807
2021-12-28 05:15:25 C 05 47 01.93 +00 21 17.2 u 807
2021-12-28 05:19:52 C 05 47 04.09 +00 21 25.5 u 807
2021-12-31 04:49:53 C 06 23 59.15 +02 35 21.2 u 807
2021-12-31 04:54:33 C 06 24 01.35 +02 35 30.0 u 807
2021-12-31 04:59:14 C 06 24 03.56 +02 35 38.6 u 807
2022-01-02 20:48:06 C 06 55 06.75 +04 28 47.1 V 033
2022-01-02 20:48:30 C 06 55 06.96 +04 28 47.4 V 033
2022-01-02 20:48:55 C 06 55 07.17 +04 28 48.3 V 033
2022-01-02 20:49:26 C 06 55 07.35 +04 28 49.4 V 033
2022-01-03 22:13:42 C 07 06 39.35 +05 12 41.1 X C95
2022-01-03 22:29:28 C 07 06 45.94 +05 13 07.5 X C95
2022-01-06 22:48:57 C 07 36 40.20 +07 06 31.7 X K87
2022-01-06 22:56:33 C 07 36 42.91 +07 06 42.6 X K87
2022-01-06 23:04:09 C 07 36 45.65 +07 06 53.7 X K87
2022-01-08 07:30:23 C 07 48 40.81 +07 52 40.6 V G96
2022-01-08 07:45:17 C 07 48 45.67 +07 53 00.8 V G96
2022-01-08 07:52:44 C 07 48 48.09 +07 53 10.8 V G96
2022-01-10 05:54:06 C 08 04 11.22 +08 51 28.3 o 691
2022-01-10 06:02:22 C 08 04 13.63 +08 51 38.5 o 691
2022-01-10 06:10:40 C 08 04 16.03 +08 51 48.7 o 691
2022-01-10 06:37:20 C 08 04 22.17 +08 52 10.8 q 734
2022-01-10 06:40:26 C 08 04 23.00 +08 52 14.6 q 734
2022-01-10 06:46:43 C 08 04 24.95 +08 52 22.1 q 734
2022-01-10 06:49:55 C 08 04 25.82 +08 52 26.3 q 734
2022-01-10 06:53:02 C 08 04 26.70 +08 52 29.9 q 734
2022-01-10 09:22:42 C 08 05 15.94 +08 55 58.1 V T08
2022-01-10 09:57:11 C 08 05 25.74 +08 56 40.5 V T08
2022-01-10 09:59:50 C 08 05 26.40 +08 56 43.4 V T08
2022-01-10 10:03:49 C 08 05 27.58 +08 56 47.0 V T08
2022-01-11 06:47:31 C 08 11 43.26 +09 20 17.2 o 691
2022-01-11 06:59:40 C 08 11 46.51 +09 20 31.4 o 691
2022-01-11 07:11:50 C 08 11 49.77 +09 20 44.8 o 691
2022-01-11 18:14:32 C 08 14 57.61 +09 32 54.2 V D29
2022-01-11 18:34:54 C 08 15 02.95 +09 33 15.9 V D29
2022-01-11 18:55:15 C 08 15 08.31 +09 33 37.6 V D29
2022-01-12 13:21:31 C 08 20 14.123 +09 53 28.44 U F52
2022-01-12 13:36:12 C 08 20 17.736 +09 53 43.00 U F52
2022-01-12 13:50:52 C 08 20 21.392 +09 53 57.63 U F52
2022-01-12 14:05:32 C 08 20 25.043 +09 54 12.12 U F52