2021 RK4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5230650282 ± 7.88e-04
Semi-major axis (a)2.0964405182 AU ± 3.55e-03
Inclination (i)7.21414934° ± 8.06e-03
Long. of Asc. Node (Ω)341.30274798° ± 2.28e-04
Arg. of Perihelion (ω)333.20895194° ± 5.21e-03
Mean Anomaly (M)147.06348806° ± 1.32e+00
Mean Motion (n)0.3247046133°/day ± 8.25e-04
Perihelion dist (q)0.99986580 AU ± 2.37e-03
Aphelion dist (Q)3.19301524 AU ± 5.66e-03
Orbital Period3.03545513 yr ± 7.71e-03
Physical Parameters
H (abs. magnitude)26.07
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.395″
Uncertainty4
Orbit TypeApollo
MOID0.017224 AU
Observations Used38
Oppositions1
Arc Total2021-2021
First Observation Used2021-09-06
Last Observation Used2021-09-10
Observations (38)
Date Type RA Dec Mag Band Observatory
2021-09-06 06:53:45 C 21 37 13.93 -08 36 37.7 V I41
2021-09-06 07:17:49 C 21 37 33.04 -08 31 04.8 V I41
2021-09-08 20:56:10 C 22 19 33.10 +03 00 39.1 o K88
2021-09-08 20:59:00 C 22 19 34.52 +03 01 05.0 o K88
2021-09-08 21:25:10 C 22 19 47.58 +03 04 55.4 o K88
2021-09-08 21:43:50 C 22 19 56.96 +03 07 41.5 o K88
2021-09-08 21:47:37 C 22 19 58.83 +03 08 13.8 o K88
2021-09-08 22:09:53 C 22 20 10.74 +03 11 28.5 V 246
2021-09-08 22:14:42 C 22 20 13.03 +03 12 10.7 V 246
2021-09-08 22:15:06 C 22 20 13.31 +03 12 13.4 V 246
2021-09-08 22:15:31 C 22 20 13.48 +03 12 16.6 V 246
2021-09-08 23:03:32 C 22 20 37.70 +03 19 12.4 V 033
2021-09-08 23:03:56 C 22 20 37.92 +03 19 16.2 V 033
2021-09-08 23:04:21 C 22 20 38.11 +03 19 19.6 V 033
2021-09-08 23:22:23 C 22 20 46.52 +03 22 10.1 V L01
2021-09-08 23:25:06 C 22 20 47.83 +03 22 34.0 V L01
2021-09-08 23:27:50 C 22 20 49.19 +03 22 56.9 V L01
2021-09-08 23:30:34 C 22 20 50.53 +03 23 21.0 V L01
2021-09-08 23:33:31 C 22 20 52.02 +03 23 46.6 V L01
2021-09-08 23:39:32 C 22 20 57.20 +03 24 43.8 X 958
2021-09-08 23:46:10 C 22 21 00.32 +03 25 40.6 X 958
2021-09-08 23:52:57 C 22 21 03.67 +03 26 39.5 X 958
2021-09-09 04:14:35 C 22 23 26.10 +04 04 11.4 q 858
2021-09-09 04:20:42 C 22 23 28.98 +04 05 02.4 q 858
2021-09-09 04:26:51 C 22 23 31.90 +04 05 54.1 q 858
2021-09-09 05:02:51 C 22 23 49.61 +04 11 02.3 V G96
2021-09-09 05:11:43 C 22 23 53.75 +04 12 16.3 V G96
2021-09-09 05:20:34 C 22 23 57.89 +04 13 30.4 V G96
2021-09-09 05:29:26 C 22 24 01.98 +04 14 43.7 V G96
2021-09-09 19:23:07 C 22 30 47.67 +06 03 28.5 V K51
2021-09-09 19:29:28 C 22 30 50.45 +06 04 15.9 V K51
2021-09-09 19:34:25 C 22 30 52.58 +06 04 53.9 V K51
2021-09-09 19:37:57 C 22 30 54.13 +06 05 20.3 V K51
2021-09-09 20:11:02 C 22 31 07.93 +06 09 16.0 V 033
2021-09-09 20:12:06 C 22 31 08.38 +06 09 24.2 V 033
2021-09-09 20:13:11 C 22 31 08.85 +06 09 32.0 V 033
2021-09-10 20:36:22 C 22 41 25.78 +08 54 34.6 V K88
2021-09-10 20:41:01 C 22 41 27.49 +08 55 03.8 V K88