2021 UD4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3041843770 ± 2.00e+00
Semi-major axis (a)1.3357319022 AU ± 3.00e+00
Inclination (i)6.20075796° ± 4.00e+00
Long. of Asc. Node (Ω)211.25178836° ± 5.00e+00
Arg. of Perihelion (ω)124.47426272° ± 6.00e+00
Mean Anomaly (M)260.82164051° ± 6.53e-01
Mean Motion (n)0.6384909400°/day ± 2.15e+00
Perihelion dist (q)0.92942990 AU ± 3.39e+00
Aphelion dist (Q)1.74191250 AU ± 4.74e+00
Orbital Period1.54365180 yr ± 5.20e+00
Physical Parameters
H (abs. magnitude)26.48
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.385″
Uncertainty3
Orbit TypeApollo
MOID0.016729 AU
Observations Used24
Oppositions1
Arc Total2021-2021
First Observation Used
Last Observation Used2021-10-30
Observations (24)
Date Type RA Dec Mag Band Observatory
2021-10-18 08:12:57 C 01 16 06.02 +48 58 26.1 V G96
2021-10-18 08:21:31 C 01 16 19.07 +48 54 52.7 V G96
2021-10-28 07:45:02 C 02 50 15.73 +08 07 43.8 V G96
2021-10-28 07:52:30 C 02 50 16.12 +08 07 19.6 V G96
2021-10-28 07:59:57 C 02 50 16.42 +08 06 55.4 V G96
2021-10-28 08:07:24 C 02 50 16.71 +08 06 32.1 V G96
2021-10-28 10:13:57 C 02 50 22.20 +07 59 44.5 V V06
2021-10-28 10:17:24 C 02 50 22.47 +07 59 33.6 V V06
2021-10-28 10:20:50 C 02 50 22.60 +07 59 23.0 V V06
2021-10-28 10:24:16 C 02 50 22.77 +07 59 12.1 V V06
2021-10-29 01:48:06 C 02 51 32.95 +07 12 18.0 V 033
2021-10-29 01:50:26 C 02 51 33.04 +07 12 11.5 V 033
2021-10-29 01:52:45 C 02 51 33.19 +07 12 04.7 V 033
2021-10-29 01:55:15 C 02 51 33.28 +07 11 57.6 V 033
2021-10-29 05:23:35 C 02 51 55.80 +07 02 45.4 V I52
2021-10-29 05:25:48 C 02 51 55.85 +07 02 39.7 V I52
2021-10-29 05:28:01 C 02 51 55.97 +07 02 34.1 V I52
2021-10-29 05:30:13 C 02 51 56.04 +07 02 27.9 V I52
2021-10-29 23:15:18 C 02 52 59.72 +06 14 57.4 V 033
2021-10-29 23:18:37 C 02 52 59.81 +06 14 49.0 V 033
2021-10-29 23:21:57 C 02 52 59.92 +06 14 41.5 V 033
2021-10-30 09:35:02 C 02 53 31.38 +05 50 28.0 V I52
2021-10-30 09:40:33 C 02 53 31.56 +05 50 14.9 V I52
2021-10-30 09:46:05 C 02 53 31.72 +05 50 01.6 V I52