IAA RAS IAA Minor Planet Database

2021 RP4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5029174384 ± 1.94e-04
Semi-major axis (a)1.9795173975 AU ± 7.93e-04
Inclination (i)4.76164781° ± 1.65e-03
Long. of Asc. Node (Ω)202.71876112° ± 3.20e-03
Arg. of Perihelion (ω)93.42420305° ± 3.03e-03
Mean Anomaly (M)198.09967122° ± 3.34e-01
Mean Motion (n)0.3538940750°/day ± 2.13e-04
Perihelion dist (q)0.98398358 AU ± 5.50e-04
Aphelion dist (Q)2.97505122 AU ± 1.25e-03
Orbital Period2.78508840 yr ± 1.67e-03
Physical Parameters
H (abs. magnitude)23.10
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.242″
Uncertainty3
Orbit TypeApollo
MOID0.072677 AU
Observations Used59
Oppositions1
Arc Total2021-2021
First Observation Used2021-09-06
Last Observation Used2021-10-07
Observations (63)
Date Type RA Dec Mag Band Observatory
2021-09-06 06:00:06 C 21 23 33.46 +19 51 18.9 – V 703
2021-09-06 06:07:50 C 21 23 36.36 +19 50 56.2 – V 703
2021-09-07 04:45:21 C 21 32 15.32 +18 44 36.2 – V G96
2021-09-07 04:46:01 C 21 32 15.57 +18 44 34.2 – V G96
2021-09-07 05:01:42 C 21 32 21.00 +18 43 49.5 – V G96
2021-09-07 05:02:23 C 21 32 21.24 +18 43 47.6 – V G96
2021-09-09 08:48:40 C 21 49 43.48 +16 21 08.0 – V U68
2021-09-09 08:54:17 C 21 49 45.16 +16 20 53.9 – V U68
2021-09-09 09:21:39 C 21 49 53.23 +16 19 40.0 – V U68
2021-09-09 09:27:17 C 21 49 54.73 +16 19 23.6 – V U68
2021-09-09 10:48:26 C 21 50 20.440 +16 16 15.79 – U F52
2021-09-09 11:05:00 C 21 50 25.226 +16 15 31.89 – U F52
2021-09-09 11:38:13 C 21 50 34.837 +16 14 03.72 – U F52
2021-09-09 19:00:48 C 21 52 53.60 +15 54 24.2 – V 033
2021-09-09 19:01:23 C 21 52 53.76 +15 54 23.0 – V 033
2021-09-09 19:01:57 C 21 52 53.93 +15 54 21.3 – V 033
2021-09-09 19:02:48 C 21 52 54.19 +15 54 19.3 – V 033
2021-09-09 19:09:22 C 21 52 55.99 +15 54 02.8 – V G34
2021-09-09 19:09:42 C 21 52 55.93 +15 54 05.8 – o K88
2021-09-09 19:12:34 C 21 52 56.73 +15 53 58.5 – o K88
2021-09-09 19:15:28 C 21 52 57.62 +15 53 51.1 – o K88
2021-09-09 19:26:11 C 21 53 00.80 +15 53 20.4 – V G34
2021-09-09 19:27:44 C 21 53 01.63 +15 53 23.2 – V 104
2021-09-09 19:28:29 C 21 53 02.40 +15 53 19.4 – X 958
2021-09-09 19:34:34 C 21 53 04.14 +15 53 04.1 – X 958
2021-09-09 19:38:20 C 21 53 04.68 +15 52 56.0 – V 104
2021-09-09 19:39:02 C 21 53 04.46 +15 52 50.3 – V 246
2021-09-09 19:40:48 C 21 53 06.01 +15 52 47.8 – X 958
2021-09-09 19:43:00 C 21 53 05.66 +15 52 37.8 – V G34
2021-09-09 19:43:03 C 21 53 05.68 +15 52 39.8 – V 246
2021-09-09 19:43:28 C 21 53 06.16 +15 52 38.5 – V 246
2021-09-09 19:48:39 C 21 53 07.59 +15 52 30.0 – V 104
2021-09-09 19:59:40 C 21 53 10.55 +15 52 00.9 – V L01
2021-09-09 19:59:49 C 21 53 10.47 +15 51 55.1 – V G34
2021-09-09 20:03:23 C 21 53 11.62 +15 51 52.0 – V L01
2021-09-09 20:07:08 C 21 53 12.69 +15 51 42.3 – V L01
2021-09-09 20:10:53 C 21 53 13.74 +15 51 33.0 – V L01
2021-09-10 06:07:31 C 21 56 10.101 +15 26 44.44 – U F52
2021-09-10 06:23:13 C 21 56 14.386 +15 26 05.88 – U F52
2021-09-10 06:38:54 C 21 56 18.651 +15 25 27.28 – U F52
2021-09-10 06:54:36 C 21 56 22.906 +15 24 48.59 – U F52
2021-09-11 07:00:10 C 22 03 02.239 +14 25 57.36 – U F52
2021-09-11 07:15:53 C 22 03 06.146 +14 25 20.58 – U F52
2021-09-11 07:47:25 C 22 03 13.972 +14 24 06.45 – U F52
2021-09-12 21:11:48 C 22 12 34.29 +12 58 23.6 – V K88
2021-09-12 21:14:40 C 22 12 34.98 +12 58 16.8 – V K88
2021-09-12 21:17:32 C 22 12 35.59 +12 58 10.5 – V K88
2021-09-13 20:49:44 C 22 17 57.42 +12 08 08.8 – V K88
2021-09-13 20:52:40 C 22 17 58.01 +12 08 03.0 – V K88
2021-09-13 22:06:43 C 22 18 13.36 +12 05 30.1 – V K88