2021 UM4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5338393360 ± 3.12e-04
Semi-major axis (a)1.4496787287 AU ± 7.33e-04
Inclination (i)3.03833893° ± 1.77e-03
Long. of Asc. Node (Ω)211.27684992° ± 2.14e-03
Arg. of Perihelion (ω)96.45533971° ± 1.12e-02
Mean Anomaly (M)148.45715335° ± 6.65e-01
Mean Motion (n)0.5646828870°/day ± 4.28e-04
Perihelion dist (q)0.67578320 AU ± 5.66e-04
Aphelion dist (Q)2.22357426 AU ± 1.21e-03
Orbital Period1.74545095 yr ± 1.32e-03
Physical Parameters
H (abs. magnitude)27.80
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.380″
Uncertainty3
Orbit TypeApollo
MOID0.001840 AU
Observations Used19
Oppositions1
Arc Total2021-2021
First Observation Used2021-10-29
Last Observation Used2021-10-30
Observations (19)
Date Type RA Dec Mag Band Observatory
2021-10-29 06:31:05 C 01 16 54.25 -02 31 06.5 V G96
2021-10-29 06:38:35 C 01 17 01.64 -02 29 45.7 V G96
2021-10-29 06:46:02 C 01 17 08.79 -02 28 26.8 V G96
2021-10-29 06:53:29 C 01 17 16.08 -02 27 05.3 V G96
2021-10-29 08:37:41 C 01 18 54.70 -02 08 59.4 V I52
2021-10-29 08:39:07 C 01 18 56.08 -02 08 44.5 V I52
2021-10-29 08:40:33 C 01 18 57.39 -02 08 31.0 V I52
2021-10-29 19:21:46 C 01 28 24.25 -00 37 49.8 V 246
2021-10-29 19:29:32 C 01 28 29.45 -00 36 53.1 V 246
2021-10-29 19:30:02 C 01 28 29.79 -00 36 49.2 V 246
2021-10-29 22:17:24 C 01 30 16.47 -00 17 21.6 V 033
2021-10-29 22:18:55 C 01 30 17.38 -00 17 11.6 V 033
2021-10-29 23:15:57 C 01 30 50.66 -00 10 30.9 V L01
2021-10-29 23:18:56 C 01 30 52.42 -00 10 11.6 V L01
2021-10-29 23:21:55 C 01 30 54.23 -00 09 52.1 V L01
2021-10-29 23:25:06 C 01 30 56.11 -00 09 31.4 V L01
2021-10-30 02:12:14 C 01 32 51.76 +00 14 05.3 V 807
2021-10-30 02:16:12 C 01 32 53.87 +00 14 29.2 V 807
2021-10-30 02:20:11 C 01 32 55.99 +00 14 52.9 V 807