2021 RB4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2324926420 ± 7.66e-04
Semi-major axis (a)1.3858679808 AU ± 1.54e-03
Inclination (i)23.19489760° ± 3.74e-02
Long. of Asc. Node (Ω)167.95442011° ± 3.30e-03
Arg. of Perihelion (ω)193.58127782° ± 2.54e-02
Mean Anomaly (M)196.11493892° ± 1.51e+00
Mean Motion (n)0.6041287234°/day ± 1.01e-03
Perihelion dist (q)1.06366387 AU ± 1.59e-03
Aphelion dist (Q)1.70807209 AU ± 2.17e-03
Orbital Period1.63148390 yr ± 2.71e-03
Physical Parameters
H (abs. magnitude)24.93
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.403″
Uncertainty4
Orbit TypeAmor
MOID0.060462 AU
Observations Used29
Oppositions1
Arc Total2021-2021
First Observation Used2021-09-08
Last Observation Used2021-09-15
Observations (30)
Date Type RA Dec Mag Band Observatory
2021-09-08 03:49:33 C 20 59 22.35 +08 58 31.2 V G96
2021-09-08 04:04:53 C 20 59 25.36 +08 55 35.8 V G96
2021-09-08 04:12:34 C 20 59 26.81 +08 54 09.3 V G96
2021-09-08 06:06:02 C 20 59 48.89 +08 32 34.8 V G96
2021-09-08 06:06:38 C 20 59 49.03 +08 32 27.9 V G96
2021-09-08 06:07:49 C 20 59 49.16 +08 32 14.4 V G96
2021-09-08 18:40:11 C 21 02 43.83 +06 05 22.5 V L01
2021-09-08 18:45:32 C 21 02 44.91 +06 04 19.6 V L01
2021-09-08 18:51:14 C 21 02 46.09 +06 03 11.5 V L01
2021-09-08 18:57:22 C 21 02 47.41 +06 01 58.3 V L01
2021-09-08 19:48:27 C 21 02 58.09 +05 51 41.3 V 033
2021-09-08 19:49:52 C 21 02 58.39 +05 51 24.5 V 033
2021-09-08 19:51:16 C 21 02 58.68 +05 51 07.7 V 033
2021-09-08 19:52:48 C 21 02 59.01 +05 50 49.5 V 033
2021-09-09 01:31:55 C 21 04 19.58 +04 42 58.8 u H21
2021-09-09 01:39:02 C 21 04 21.15 +04 41 32.2 u H21
2021-09-09 03:03:16 C 21 04 40.90 +04 24 34.4 q 858
2021-09-09 03:11:07 C 21 04 42.55 +04 22 59.2 q 858
2021-09-09 03:18:46 C 21 04 44.18 +04 21 25.5 q 858
2021-09-09 03:39:15 C 21 04 47.31 +04 17 07.7 V 734
2021-09-09 04:02:13 C 21 04 52.13 +04 12 28.5 V 734
2021-09-11 05:45:18 C 21 17 30.897 -06 30 46.54 U F51
2021-09-11 06:03:03 C 21 17 35.218 -06 34 49.17 U F51
2021-09-11 06:38:32 C 21 17 43.863 -06 42 50.34 U F51
2021-09-12 06:22:13 C 21 24 16.31 -12 07 14.0 o 291
2021-09-12 06:24:23 C 21 24 16.90 -12 07 43.9 o 291
2021-09-12 06:26:34 C 21 24 17.44 -12 08 13.9 o 291
2021-09-15 02:25:16 C 21 45 37.66 -27 19 46.4 u 807
2021-09-15 02:34:32 C 21 45 40.49 -27 21 44.9 u 807
2021-09-15 02:43:46 C 21 45 43.30 -27 23 42.4 u 807