IAA RAS IAA Minor Planet Database

2021 RA4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2618299001 ± 1.29e-04
Semi-major axis (a)0.8965204090 AU ± 1.29e-05
Inclination (i)17.66333726° ± 1.43e-02
Long. of Asc. Node (Ω)165.01203585° ± 1.39e-03
Arg. of Perihelion (ω)33.66959235° ± 1.18e-02
Mean Anomaly (M)106.64767615° ± 6.71e-02
Mean Motion (n)1.1611063636°/day ± 2.50e-05
Perihelion dist (q)0.66178456 AU ± 1.16e-04
Aphelion dist (Q)1.13125626 AU ± 1.17e-04
Orbital Period0.84886821 yr ± 1.83e-05
Physical Parameters
H (abs. magnitude)24.32
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.332″
Uncertainty2
Orbit TypeAten
MOID0.047515 AU
Observations Used41
Oppositions1
Arc Total2021-2021
First Observation Used2021-09-08
Last Observation Used2021-09-24
Observations (41)
Date Type RA Dec Mag Band Observatory
2021-09-08 07:38:42 C 21 03 57.252 -10 18 00.97 – U F51
2021-09-08 07:53:29 C 21 03 57.957 -10 20 44.76 – U F51
2021-09-08 08:08:15 C 21 03 58.662 -10 23 28.37 – U F51
2021-09-08 19:56:02 C 21 04 59.23 -12 30 25.9 – V 246
2021-09-08 19:56:14 C 21 04 59.26 -12 30 27.4 – V 246
2021-09-08 19:56:27 C 21 04 59.29 -12 30 30.6 – V 246
2021-09-08 19:56:39 C 21 04 59.25 -12 30 32.6 – V 246
2021-09-08 19:57:53 C 21 04 59.54 -12 30 46.6 – V 033
2021-09-08 19:58:24 C 21 04 59.57 -12 30 52.1 – V 033
2021-09-08 19:58:55 C 21 04 59.63 -12 30 57.7 – V 033
2021-09-08 19:59:46 C 21 04 59.66 -12 31 06.2 – V 033
2021-09-08 20:02:31 C 21 04 59.61 -12 31 33.1 – V 246
2021-09-08 20:04:33 C 21 04 59.72 -12 31 53.8 – V 246
2021-09-08 20:05:37 C 21 04 59.76 -12 32 05.3 – V 246
2021-09-08 21:06:49 C 21 05 05.02 -12 42 30.3 – X 958
2021-09-08 21:11:26 C 21 05 05.29 -12 43 18.4 – X 958
2021-09-08 21:13:52 C 21 05 03.76 -12 43 45.0 – V L01
2021-09-08 21:16:13 C 21 05 03.86 -12 44 10.0 – V L01
2021-09-08 21:16:21 C 21 05 05.56 -12 44 09.3 – X 958
2021-09-08 21:18:34 C 21 05 04.00 -12 44 34.1 – V L01
2021-09-08 21:20:54 C 21 05 04.10 -12 44 57.4 – V L01
2021-09-08 21:23:37 C 21 05 04.24 -12 45 25.9 – V L01
2021-09-08 22:03:01 C 21 05 13.84 -12 49 54.3 – X Y00
2021-09-08 22:07:42 C 21 05 14.11 -12 50 42.6 – X Y00
2021-09-08 22:12:14 C 21 05 14.38 -12 51 28.8 – X Y00
2021-09-08 22:38:23 C 21 05 08.69 -12 58 08.3 – V 104
2021-09-08 22:43:58 C 21 05 09.02 -12 59 05.3 – V 104
2021-09-08 22:49:33 C 21 05 09.34 -13 00 02.0 – V 104
2021-09-09 02:24:30 C 21 05 32.06 -13 36 08.1 – u H21
2021-09-09 02:28:32 C 21 05 32.27 -13 36 48.3 – u H21
2021-09-09 02:32:33 C 21 05 32.47 -13 37 29.5 – u H21
2021-09-09 03:35:39 C 21 05 38.06 -13 47 51.0 – q 858
2021-09-09 03:40:07 C 21 05 38.28 -13 48 35.4 – q 858
2021-09-09 03:44:33 C 21 05 38.50 -13 49 19.7 – q 858
2021-09-11 05:29:15 C 21 09 27.48 -21 01 19.6 – o 691
2021-09-11 05:33:55 C 21 09 27.71 -21 01 54.3 – o 691
2021-09-11 07:01:48 C 21 09 37.079 -21 12 37.69 – U F51
2021-09-11 07:43:57 C 21 09 38.839 -21 17 54.10 – U F51
2021-09-24 03:55:42 C 21 29 20.61 -40 30 56.3 – V 807
2021-09-24 04:03:45 C 21 29 20.95 -40 31 09.1 – V 807
2021-09-24 04:11:46 C 21 29 21.39 -40 31 21.7 – V 807