2021 AH4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1970649024 ± 6.72e-05
Semi-major axis (a)1.1982345850 AU ± 1.05e-04
Inclination (i)18.71569750° ± 4.98e-03
Long. of Asc. Node (Ω)121.47510704° ± 1.44e-03
Arg. of Perihelion (ω)58.35551488° ± 4.52e-03
Mean Anomaly (M)200.85887503° ± 1.68e-01
Mean Motion (n)0.7514489816°/day ± 9.91e-05
Perihelion dist (q)0.96210460 AU ± 1.17e-04
Aphelion dist (Q)1.43436457 AU ± 1.50e-04
Orbital Period1.31163433 yr ± 1.73e-04
Physical Parameters
H (abs. magnitude)23.61
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.264″
Uncertainty3
Orbit TypeApollo
MOID0.053370 AU
Observations Used31
Oppositions1
Arc Total2021-2021
First Observation Used2021-01-08
Last Observation Used2021-01-31
Observations (31)
Date Type RA Dec Mag Band Observatory
2021-01-08 09:50:20 C 05 29 41.943 -17 29 20.55 U F51
2021-01-08 10:06:09 C 05 29 39.444 -17 28 32.37 U F51
2021-01-08 10:21:43 C 05 29 37.024 -17 27 45.27 U F51
2021-01-08 10:37:20 C 05 29 34.587 -17 26 57.58 U F51
2021-01-09 10:07:55 C 05 26 11.947 -16 13 17.83 V 568
2021-01-09 10:09:19 C 05 26 11.720 -16 13 13.27 V 568
2021-01-09 10:10:43 C 05 26 11.495 -16 13 08.68 V 568
2021-01-10 13:00:00 C 05 22 14.20 -14 41 43.2 V 474
2021-01-10 13:05:07 C 05 22 13.42 -14 41 25.4 V 474
2021-01-10 13:10:15 C 05 22 12.65 -14 41 07.3 V 474
2021-01-10 21:10:57 C 05 21 02.43 -14 14 08.8 V 033
2021-01-10 21:14:37 C 05 21 01.82 -14 13 55.6 V 033
2021-01-11 03:42:00 C 05 20 04.86 -13 50 24.2 V V06
2021-01-11 03:43:55 C 05 20 04.55 -13 50 16.7 V V06
2021-01-11 03:45:50 C 05 20 04.24 -13 50 10.0 V V06
2021-01-11 03:47:46 C 05 20 03.89 -13 50 02.8 V V06
2021-01-12 04:23:21 C 05 16 15.31 -12 16 18.4 u 807
2021-01-12 04:30:50 C 05 16 14.06 -12 15 48.5 u 807
2021-01-12 04:38:07 C 05 16 12.86 -12 15 20.5 u 807
2021-01-13 03:51:10 C 05 12 35.96 -10 42 01.1 u 807
2021-01-13 03:57:04 C 05 12 34.93 -10 41 36.5 u 807
2021-01-13 04:02:49 C 05 12 33.95 -10 41 12.4 u 807
2021-01-13 06:15:24 C 05 12 13.45 -10 33 05.4 V G96
2021-01-13 06:37:37 C 05 12 09.61 -10 31 31.5 V G96
2021-01-18 03:32:38 C 04 52 51.97 -01 11 19.0 V I52
2021-01-18 03:35:03 C 04 52 51.51 -01 11 06.0 V I52
2021-01-18 03:37:28 C 04 52 51.03 -01 10 53.0 V I52
2021-01-31 04:20:42 C 03 52 01.27 +31 51 03.8 V I52
2021-01-31 04:24:57 C 03 52 00.22 +31 51 30.4 V I52
2021-01-31 04:29:12 C 03 51 59.25 +31 51 57.0 V I52
2021-01-31 04:33:27 C 03 51 58.23 +31 52 24.1 V I52