2021 AA4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3380148091 ± 1.72e-01
Semi-major axis (a)1.3708835187 AU ± 2.95e-01
Inclination (i)5.28302848° ± 2.39e+00
Long. of Asc. Node (Ω)268.90478252° ± 1.12e+00
Arg. of Perihelion (ω)137.28234701° ± 3.56e+00
Mean Anomaly (M)41.96610865° ± 3.64e+02
Mean Motion (n)0.6140511200°/day ± 1.98e-01
Perihelion dist (q)0.90750240 AU ± 3.06e-01
Aphelion dist (Q)1.83425920 AU ± 4.60e-01
Orbital Period1.60509060 yr ± 5.19e-01
Physical Parameters
H (abs. magnitude)24.99
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.258″
Uncertainty3
Orbit TypeApollo
MOID0.005030 AU
Observations Used32
Oppositions1
Arc Total2021-2021
First Observation Used
Last Observation Used2021-01-18
Observations (36)
Date Type RA Dec Mag Band Observatory
2021-01-08 08:43:15 C 04 40 02.837 -00 11 31.66 U F51
2021-01-08 08:59:22 C 04 40 10.191 -00 11 21.00 U F51
2021-01-08 09:31:31 C 04 40 24.843 -00 10 59.80 U F51
2021-01-09 03:19:04 C 04 48 45.53 +00 02 07.6 u 807
2021-01-09 03:25:48 C 04 48 48.40 +00 02 12.2 u 807
2021-01-09 03:32:14 C 04 48 51.08 +00 02 15.9 u 807
2021-01-10 04:51:57 C 04 59 36.81 +00 17 41.7 V 807
2021-01-10 04:59:04 C 04 59 39.54 +00 17 45.8 V 807
2021-01-10 05:06:11 C 04 59 42.25 +00 17 50.3 V 807
2021-01-10 05:13:17 C 04 59 44.98 +00 17 54.2 V 807
2021-01-10 11:54:25 C 05 02 26.44 +00 22 09.8 V 474
2021-01-10 11:59:36 C 05 02 28.43 +00 22 14.3 V 474
2021-01-10 12:04:50 C 05 02 30.35 +00 22 16.9 V 474
2021-01-10 12:10:01 C 05 02 32.24 +00 22 18.8 V 474
2021-01-10 19:42:04 C 05 05 30.22 +00 24 06.2 V 033
2021-01-10 19:44:59 C 05 05 31.24 +00 24 08.2 V 033
2021-01-10 19:47:54 C 05 05 32.28 +00 24 09.4 V 033
2021-01-10 19:50:57 C 05 05 33.45 +00 24 11.2 V 033
2021-01-10 21:58:42 C 05 06 19.30 +00 25 31.5 V 204
2021-01-10 22:37:34 C 05 06 33.12 +00 25 53.8 V 204
2021-01-11 03:50:13 C 05 08 32.47 +00 29 10.9 V V06
2021-01-11 03:52:46 C 05 08 33.66 +00 29 13.0 V V06
2021-01-11 03:55:20 C 05 08 34.56 +00 29 14.7 V V06
2021-01-11 03:57:53 C 05 08 35.41 +00 29 16.0 V V06
2021-01-12 03:55:59 C 05 16 53.95 +00 44 13.6 u 807
2021-01-12 03:56:27 C 05 16 57.95 +00 42 33.4 V V06
2021-01-12 03:58:22 C 05 16 58.55 +00 42 34.4 V V06
2021-01-12 04:00:17 C 05 16 59.16 +00 42 35.2 V V06
2021-01-12 04:02:12 C 05 16 59.72 +00 42 36.4 V V06
2021-01-12 04:03:16 C 05 16 56.24 +00 44 18.3 u 807
2021-01-14 08:45:32 C 05 32 46.65 +01 09 50.1 o 291
2021-01-14 08:55:04 C 05 32 49.12 +01 09 54.6 o 291
2021-01-18 05:02:46 C 05 54 23.07 +01 52 40.4 V V06
2021-01-18 05:45:07 C 05 54 30.78 +01 52 58.9 V V06
2021-01-18 05:49:41 C 05 54 31.61 +01 53 00.6 V V06
2021-01-18 05:58:17 C 05 54 33.17 +01 53 04.6 V V06