IAA RAS IAA Minor Planet Database

2021 OB1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5016819603 ± 2.31e-04
Semi-major axis (a)1.8883954251 AU ± 8.50e-04
Inclination (i)4.75702178° ± 1.77e-03
Long. of Asc. Node (Ω)302.03309861° ± 1.32e-03
Arg. of Perihelion (ω)52.58376516° ± 2.93e-04
Mean Anomaly (M)223.24364568° ± 3.84e-01
Mean Motion (n)0.3798156598°/day ± 2.56e-04
Perihelion dist (q)0.94102151 AU ± 6.08e-04
Aphelion dist (Q)2.83576934 AU ± 1.35e-03
Orbital Period2.59501223 yr ± 1.75e-03
Physical Parameters
H (abs. magnitude)25.76
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.289″
Uncertainty3
Orbit TypeApollo
MOID0.018970 AU
Observations Used50
Oppositions1
Arc Total2021-2021
First Observation Used2021-07-29
Last Observation Used2021-08-02
Observations (50)
Date Type RA Dec Mag Band Observatory
2021-07-29 07:57:52 C 20 43 50.189 -09 35 09.46 – U F51
2021-07-29 08:11:50 C 20 43 55.771 -09 32 57.93 – U F51
2021-07-29 08:25:50 C 20 44 01.314 -09 30 46.57 – U F51
2021-07-29 08:39:53 C 20 44 06.873 -09 28 33.96 – U F51
2021-07-29 20:49:48 C 20 49 45.74 -07 27 11.2 – V 033
2021-07-29 20:50:19 C 20 49 45.99 -07 27 06.0 – V 033
2021-07-29 20:50:50 C 20 49 46.21 -07 27 00.7 – V 033
2021-07-29 20:51:25 C 20 49 46.47 -07 26 54.6 – V 033
2021-07-29 21:30:34 C 20 50 05.35 -07 19 45.9 – V 587
2021-07-29 21:32:10 C 20 50 06.05 -07 19 28.8 – V 587
2021-07-29 21:34:17 C 20 50 07.03 -07 19 05.7 – V 587
2021-07-29 21:49:44 C 20 50 13.91 -07 16 17.2 – V 104
2021-07-29 21:58:04 C 20 50 17.68 -07 14 47.5 – V 104
2021-07-29 22:06:24 C 20 50 21.47 -07 13 17.7 – V 104
2021-07-29 23:30:07 C 20 50 59.87 -06 58 12.2 – V 203
2021-07-29 23:49:14 C 20 51 07.78 -06 54 41.3 – V L01
2021-07-29 23:51:35 C 20 51 09.69 -06 54 17.2 – V 203
2021-07-29 23:53:47 C 20 51 09.88 -06 53 51.8 – V L01
2021-07-29 23:56:02 C 20 51 10.89 -06 53 27.3 – V L01
2021-07-29 23:58:16 C 20 51 11.92 -06 53 02.6 – V L01
2021-07-30 00:15:48 C 20 51 20.81 -06 49 50.0 – V 203
2021-07-30 03:51:47 C 20 53 10.95 -06 05 42.9 – X Y00
2021-07-30 03:54:00 C 20 53 11.95 -06 05 17.2 – X Y00
2021-07-30 03:56:13 C 20 53 12.98 -06 04 52.1 – X Y00
2021-07-30 06:02:12 C 20 54 23.35 -05 44 05.1 – q H36
2021-07-30 06:17:56 C 20 54 30.88 -05 41 02.4 – q H36
2021-07-30 06:22:06 C 20 54 37.41 -05 39 59.7 – V 654
2021-07-30 06:32:03 C 20 54 37.72 -05 38 17.0 – q H36
2021-07-30 06:50:02 C 20 54 50.95 -05 34 33.2 – V 654
2021-07-30 07:21:29 C 20 55 06.18 -05 28 23.6 – V 654
2021-07-30 07:51:26 C 20 55 20.71 -05 22 29.5 – V 654
2021-07-30 21:16:41 C 21 03 07.71 -02 28 49.9 – V L81
2021-07-30 21:36:46 C 21 03 18.83 -02 24 18.5 – V L81
2021-07-31 02:18:31 C 21 06 01.39 -01 23 51.7 – V 033
2021-07-31 02:18:56 C 21 06 01.63 -01 23 45.5 – V 033
2021-07-31 02:19:20 C 21 06 01.87 -01 23 39.6 – V 033
2021-07-31 05:56:41 C 21 08 26.46 -00 26 17.8 – u 807
2021-07-31 06:00:10 C 21 08 28.55 -00 25 27.1 – u 807
2021-07-31 06:03:40 C 21 08 30.64 -00 24 35.4 – u 807
2021-07-31 20:27:48 C 21 18 52.75 +03 16 18.3 – V 033
2021-07-31 20:28:22 C 21 18 53.16 +03 16 28.1 – V 033
2021-07-31 20:28:57 C 21 18 53.59 +03 16 37.7 – V 033
2021-07-31 20:29:34 C 21 18 54.06 +03 16 48.2 – V 033
2021-08-01 20:23:46 C 21 39 22.28 +10 42 15.3 – V 033
2021-08-01 20:24:25 C 21 39 22.89 +10 42 28.7 – V 033
2021-08-01 20:25:04 C 21 39 23.51 +10 42 42.6 – V 033
2021-08-01 20:25:44 C 21 39 24.12 +10 42 56.0 – V 033
2021-08-02 21:04:36 C 22 06 29.88 +19 51 41.9 – V 033
2021-08-02 21:05:00 C 22 06 30.37 +19 51 51.4 – V 033
2021-08-02 21:05:25 C 22 06 30.87 +19 52 01.2 – V 033