IAA RAS IAA Minor Planet Database

2021 AB4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2903654063 ± 4.51e-05
Semi-major axis (a)1.3201388872 AU ± 7.25e-05
Inclination (i)2.99289817° ± 4.43e-04
Long. of Asc. Node (Ω)287.60982470° ± 1.93e-04
Arg. of Perihelion (ω)141.02218422° ± 9.50e-04
Mean Anomaly (M)97.15885068° ± 1.01e-01
Mean Motion (n)0.6498046874°/day ± 5.35e-05
Perihelion dist (q)0.93681622 AU ± 7.87e-05
Aphelion dist (Q)1.70346155 AU ± 1.11e-04
Orbital Period1.51680390 yr ± 1.25e-04
Physical Parameters
H (abs. magnitude)26.84
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.355″
Uncertainty3
Orbit TypeApollo
MOID0.000850 AU
Observations Used94
Oppositions1
Arc Total2021-2021
First Observation Used2021-01-08
Last Observation Used2021-02-01
Observations (98)
Date Type RA Dec Mag Band Observatory
2021-01-08 10:29:49 C 10 55 44.99 +01 54 52.0 – V I41
2021-01-08 11:11:44 C 10 54 26.28 +01 52 49.4 – V I41
2021-01-08 11:12:14 C 10 54 25.37 +01 52 48.7 – V I41
2021-01-09 09:32:24 C 10 26 56.05 +01 02 56.0 – o I41
2021-01-09 11:04:03 C 10 25 14.70 +01 00 23.1 – o I41
2021-01-10 02:01:30 C 10 13 25.80 +00 37 19.2 – o K88
2021-01-10 02:02:31 C 10 13 24.96 +00 37 18.1 – o K88
2021-01-10 02:03:35 C 10 13 24.14 +00 37 17.0 – o K88
2021-01-10 02:15:09 C 10 13 14.93 +00 37 03.3 – o K88
2021-01-10 02:15:56 C 10 13 14.29 +00 37 01.4 – o K88
2021-01-10 02:16:42 C 10 13 13.66 +00 37 01.1 – o K88
2021-01-10 02:17:29 C 10 13 13.04 +00 37 00.2 – o K88
2021-01-10 02:18:16 C 10 13 12.43 +00 36 59.0 – o K88
2021-01-10 02:20:53 C 10 13 10.36 +00 36 56.5 – o K88
2021-01-10 02:21:40 C 10 13 09.68 +00 36 55.4 – o K88
2021-01-10 02:22:26 C 10 13 09.08 +00 36 54.3 – o K88
2021-01-10 02:23:13 C 10 13 08.47 +00 36 53.6 – o K88
2021-01-10 02:23:59 C 10 13 07.85 +00 36 52.8 – o K88
2021-01-10 02:35:36 C 10 12 58.70 +00 36 38.5 – o K88
2021-01-10 02:36:23 C 10 12 58.10 +00 36 37.6 – o K88
2021-01-10 02:37:09 C 10 12 57.48 +00 36 37.4 – o K88
2021-01-10 02:38:43 C 10 12 56.23 +00 36 35.4 – o K88
2021-01-10 02:41:49 C 10 12 53.80 +00 36 31.3 – o K88
2021-01-10 02:42:36 C 10 12 53.24 +00 36 30.8 – o K88
2021-01-10 02:45:29 C 10 12 50.93 +00 36 27.8 – o K88
2021-01-10 02:46:16 C 10 12 50.31 +00 36 26.0 – o K88
2021-01-10 02:47:03 C 10 12 49.72 +00 36 24.9 – o K88
2021-01-10 02:50:09 C 10 12 47.18 +00 36 21.8 – o K88
2021-01-10 02:50:56 C 10 12 46.56 +00 36 20.7 – o K88
2021-01-10 02:59:05 C 10 12 40.21 +00 36 11.7 – o K88
2021-01-10 05:32:08 C 10 11 32.36 +00 34 57.2 – V W34
2021-01-10 05:43:54 C 10 11 23.59 +00 34 44.8 – V W34
2021-01-10 05:56:07 C 10 11 14.39 +00 34 30.5 – V W34
2021-01-10 11:23:21 C 10 07 53.85 +00 31 04.0 – V T08
2021-01-10 11:47:58 C 10 07 36.14 +00 30 38.7 – V T08
2021-01-10 11:56:09 C 10 07 30.36 +00 30 31.3 – V T08
2021-01-10 12:00:48 C 10 07 26.94 +00 30 27.8 – V T08
2021-01-10 14:01:39 C 10 06 18.16 +00 37 57.1 – V 474
2021-01-10 14:02:57 C 10 06 17.28 +00 37 55.2 – V 474
2021-01-10 14:04:16 C 10 06 16.44 +00 37 54.0 – V 474
2021-01-10 14:05:35 C 10 06 15.55 +00 37 53.2 – V 474
2021-01-10 20:55:25 C 10 02 33.32 +00 19 03.4 – V N88
2021-01-10 20:56:19 C 10 02 32.71 +00 19 02.8 – V N88
2021-01-10 22:43:18 C 10 01 58.64 +00 17 23.7 – V L01
2021-01-10 22:46:21 C 10 01 56.94 +00 17 21.4 – V L01
2021-01-10 22:49:24 C 10 01 55.24 +00 17 18.5 – V L01
2021-01-10 22:52:03 C 10 01 53.77 +00 17 16.1 – V L01
2021-01-10 23:17:46 C 10 01 38.48 +00 16 21.6 – V 033
2021-01-10 23:18:23 C 10 01 43.56 +00 17 00.6 – V I93
2021-01-10 23:18:35 C 10 01 38.01 +00 16 21.1 – V 033