IAA RAS IAA Minor Planet Database

2021 AF4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7912578244 ± 1.07e-05
Semi-major axis (a)2.3823959235 AU ± 4.68e-05
Inclination (i)8.98621405° ± 3.49e-04
Long. of Asc. Node (Ω)20.42814215° ± 1.28e-03
Arg. of Perihelion (ω)9.00564452° ± 2.48e-04
Mean Anomaly (M)132.22387931° ± 1.46e-02
Mean Motion (n)0.2680349150°/day ± 7.91e-06
Perihelion dist (q)0.49730651 AU ± 2.72e-05
Aphelion dist (Q)4.26748534 AU ± 8.77e-05
Orbital Period3.67723094 yr ± 1.08e-04
Physical Parameters
H (abs. magnitude)20.90
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.064″
Uncertainty2
Orbit TypeApollo
MOID0.148306 AU
Observations Used35
Oppositions1
Arc Total2021-2021
First Observation Used2021-01-07
Last Observation Used2021-02-24
Observations (46)
Date Type RA Dec Mag Band Observatory
2021-01-04 04:28:26 S 13 20 31.48 +07 28 14.0 – L C51
2021-01-04 07:36:46 S 13 20 21.43 +07 29 41.0 – L C51
2021-01-04 10:45:04 S 13 20 11.09 +07 31 09.0 – L C51
2021-01-04 12:19:19 S 13 20 06.02 +07 31 54.5 – L C51
2021-01-04 13:53:24 S 13 20 00.90 +07 32 38.2 – L C51
2021-01-04 15:27:38 S 13 19 55.72 +07 33 22.6 – L C51
2021-01-04 18:35:47 S 13 19 45.45 +07 34 51.5 – L C51
2021-01-04 18:35:58 S 13 19 45.44 +07 34 52.0 – L C51
2021-01-07 15:21:44 C 13 15 51.104 +08 07 59.88 – V T12
2021-01-08 13:49:16 C 13 14 30.439 +08 19 12.00 – V T12
2021-01-10 15:51:13 C 13 11 21.433 +08 44 50.94 – V T14
2021-01-10 15:53:18 C 13 11 21.291 +08 44 51.99 – V T14
2021-01-10 15:55:23 C 13 11 21.151 +08 44 53.09 – V T14
2021-01-10 15:57:59 C 13 11 20.969 +08 44 54.45 – V T14
2021-01-10 16:00:04 C 13 11 20.829 +08 44 55.53 – V T14
2021-01-10 16:02:09 C 13 11 20.680 +08 44 56.64 – V T14
2021-01-11 15:24:55 C 13 09 48.555 +08 57 15.28 – V T14
2021-01-11 15:27:00 C 13 09 48.406 +08 57 16.40 – V T14
2021-01-11 15:29:05 C 13 09 48.261 +08 57 17.51 – V T14
2021-01-11 15:39:47 C 13 09 47.505 +08 57 23.18 – V T14
2021-01-11 15:41:51 C 13 09 47.358 +08 57 24.28 – V T14
2021-01-11 15:43:57 C 13 09 47.212 +08 57 25.41 – V T14
2021-01-11 15:46:53 C 13 09 47.004 +08 57 26.97 – V T14
2021-01-11 15:48:58 C 13 09 46.857 +08 57 28.08 – V T14
2021-01-11 15:51:02 C 13 09 46.709 +08 57 29.20 – V T14
2021-01-12 15:47:57 C 13 08 09.295 +09 10 19.24 – V T14
2021-01-12 15:50:01 C 13 08 09.145 +09 10 20.38 – V T14
2021-01-15 14:14:46 C 13 03 05.498 +09 49 20.41 – U F51
2021-01-15 14:47:16 C 13 03 02.948 +09 49 38.79 – U F51
2021-01-15 15:03:35 C 13 03 01.663 +09 49 48.42 – U F51
2021-02-05 08:11:05 C 12 14 29.46 +14 57 08.5 – V 807
2021-02-05 08:19:24 C 12 14 28.46 +14 57 13.7 – V 807
2021-02-05 08:27:42 C 12 14 27.46 +14 57 18.8 – V 807
2021-02-06 08:41:26 C 12 11 36.85 +15 12 00.1 – V 807
2021-02-06 08:49:43 C 12 11 35.85 +15 12 05.0 – V 807
2021-02-06 08:58:00 C 12 11 34.88 +15 12 09.7 – V 807
2021-02-07 11:36:09 C 12 08 25.49 +15 27 52.2 – o 291
2021-02-07 11:40:56 C 12 08 25.503 +15 27 57.16 – U F51
2021-02-07 11:45:52 C 12 08 24.32 +15 27 58.0 – o 291
2021-02-07 11:55:34 C 12 08 23.16 +15 28 04.0 – o 291
2021-02-07 11:56:00 C 12 08 23.658 +15 28 06.21 – U F51
2021-02-07 12:11:07 C 12 08 21.809 +15 28 15.19 – U F51
2021-02-07 12:26:11 C 12 08 19.963 +15 28 24.07 – U F51
2021-02-24 11:47:55 C 11 19 43.99 +18 38 08.0 – V 695
2021-02-24 11:55:57 C 11 19 43.07 +18 38 10.5 – V 695
2021-02-24 12:03:59 C 11 19 42.17 +18 38 12.8 – V 695