2021 UA4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1883548283 ± 5.78e-05
Semi-major axis (a)1.5352979863 AU ± 3.18e-04
Inclination (i)21.75822044° ± 9.85e-03
Long. of Asc. Node (Ω)206.74207101° ± 2.40e-03
Arg. of Perihelion (ω)251.72644789° ± 2.25e-02
Mean Anomaly (M)5.18968919° ± 2.17e-01
Mean Motion (n)0.5181115283°/day ± 1.61e-04
Perihelion dist (q)1.24611720 AU ± 2.73e-04
Aphelion dist (Q)1.82447877 AU ± 3.88e-04
Orbital Period1.90234386 yr ± 5.91e-04
Physical Parameters
H (abs. magnitude)22.37
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.254″
Uncertainty3
Orbit TypeAmor
MOID0.364313 AU
Observations Used28
Oppositions1
Arc Total2021-2021
First Observation Used2021-10-28
Last Observation Used2021-11-30
Observations (28)
Date Type RA Dec Mag Band Observatory
2021-10-28 07:06:27 C 02 44 24.01 +01 50 25.0 V G96
2021-10-28 07:13:51 C 02 44 23.85 +01 50 07.3 V G96
2021-10-28 07:21:14 C 02 44 23.66 +01 49 48.3 V G96
2021-10-28 07:28:38 C 02 44 23.43 +01 49 29.6 V G96
2021-10-28 09:43:01 C 02 44 19.82 +01 43 51.6 V V06
2021-10-28 09:46:28 C 02 44 19.77 +01 43 42.5 V V06
2021-10-28 09:49:54 C 02 44 19.67 +01 43 33.9 V V06
2021-10-29 05:44:43 C 02 43 55.12 +00 53 20.3 V I52
2021-10-29 05:55:46 C 02 43 54.81 +00 52 52.4 V I52
2021-10-29 06:01:18 C 02 43 54.63 +00 52 38.0 V I52
2021-10-30 00:30:00 C 02 43 29.07 +00 05 52.9 V 033
2021-10-30 00:34:10 C 02 43 28.96 +00 05 41.6 V 033
2021-10-30 03:34:21 C 02 43 25.68 -00 01 22.9 u 807
2021-10-30 03:40:26 C 02 43 25.54 -00 01 37.7 u 807
2021-10-30 03:46:31 C 02 43 25.27 -00 01 52.9 u 807
2021-10-30 08:54:25 C 02 43 17.45 -00 15 15.2 V I52
2021-10-30 08:59:57 C 02 43 17.29 -00 15 29.2 V I52
2021-10-30 09:25:57 C 02 43 16.56 -00 16 35.1 V I52
2021-10-30 09:30:16 C 02 43 17.494 -00 16 41.60 U F51
2021-10-30 10:00:12 C 02 43 16.631 -00 17 57.08 U F51
2021-10-30 10:18:28 C 02 43 16.077 -00 18 43.27 U F51
2021-10-30 10:36:47 C 02 43 15.539 -00 19 29.61 U F51
2021-11-08 09:44:29 C 02 38 00.371 -09 06 26.11 U F51
2021-11-08 10:00:53 C 02 37 59.878 -09 07 04.00 U F51
2021-11-08 10:17:14 C 02 37 59.371 -09 07 41.73 U F51
2021-11-30 04:01:18 C 02 30 46.26 -23 51 46.1 V 807
2021-11-30 04:11:23 C 02 30 46.23 -23 51 56.7 V 807
2021-11-30 04:21:14 C 02 30 46.19 -23 52 06.6 V 807