IAA RAS IAA Minor Planet Database

2021 OS1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4565823828 ± 8.76e-05
Semi-major axis (a)1.8701736130 AU ± 3.03e-04
Inclination (i)5.13548382° ± 7.10e-04
Long. of Asc. Node (Ω)319.07779231° ± 1.14e-04
Arg. of Perihelion (ω)27.49588960° ± 1.41e-04
Mean Anomaly (M)232.95956070° ± 1.45e-01
Mean Motion (n)0.3853801918°/day ± 9.37e-05
Perihelion dist (q)1.01628529 AU ± 2.32e-04
Aphelion dist (Q)2.72406194 AU ± 4.71e-04
Orbital Period2.55754267 yr ± 6.22e-04
Physical Parameters
H (abs. magnitude)24.77
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.276″
Uncertainty3
Orbit TypeApollo
MOID0.023965 AU
Observations Used46
Oppositions1
Arc Total2021-2021
First Observation Used2021-07-11
Last Observation Used2021-08-15
Observations (49)
Date Type RA Dec Mag Band Observatory
2021-07-11 09:19:02 C 20 01 07.366 -38 13 00.89 – V F51
2021-07-11 09:29:21 C 20 01 08.014 -38 13 00.25 – V F51
2021-07-11 09:39:38 C 20 01 08.670 -38 12 59.41 – V F51
2021-07-31 09:33:52 C 21 17 43.645 -30 16 30.63 – U F51
2021-07-31 09:50:40 C 21 17 48.190 -30 15 43.63 – U F51
2021-07-31 10:07:30 C 21 17 52.721 -30 14 56.25 – U F51
2021-07-31 10:24:17 C 21 17 57.238 -30 14 08.73 – U F51
2021-07-31 21:13:09 C 21 21 21.64 -29 40 27.9 – V L81
2021-07-31 21:26:47 C 21 21 25.58 -29 39 47.8 – V L81
2021-07-31 21:39:45 C 21 21 29.27 -29 39 09.2 – V L81
2021-08-01 02:51:14 C 21 23 06.34 -29 23 05.2 – X Y00
2021-08-01 02:54:34 C 21 23 07.27 -29 22 54.8 – X Y00
2021-08-01 02:58:29 C 21 23 08.38 -29 22 43.0 – X Y00
2021-08-01 10:35:54 C 21 25 36.846 -28 59 11.98 – V F51
2021-08-01 15:45:23 C 21 27 16.08 -28 40 04.3 – q E23
2021-08-01 16:15:53 C 21 27 25.54 -28 38 17.5 – q E23
2021-08-03 01:46:12 C 21 39 29.21 -26 31 33.8 – u 807
2021-08-03 01:49:24 C 21 39 30.35 -26 31 21.2 – u 807
2021-08-03 01:52:28 C 21 39 31.43 -26 31 09.0 – u 807
2021-08-05 05:41:04 C 22 00 32.19 -22 21 54.2 – V W94
2021-08-05 05:49:25 C 22 00 35.57 -22 21 08.3 – V W94
2021-08-05 05:57:55 C 22 00 38.93 -22 20 21.1 – V W94
2021-08-06 16:27:52 C 22 16 49.25 -18 51 21.7 – q D29
2021-08-06 16:52:04 C 22 17 00.13 -18 48 42.3 – q D29
2021-08-06 17:16:15 C 22 17 10.99 -18 46 00.0 – q D29
2021-08-07 11:03:38 C 22 26 13.32 -16 40 15.4 – V T05
2021-08-07 11:06:16 C 22 26 14.23 -16 39 59.4 – V T05
2021-08-07 11:18:09 C 22 26 20.16 -16 38 28.5 – V T05
2021-08-07 11:26:49 C 22 26 24.22 -16 37 25.4 – V T05
2021-08-07 17:27:32 C 22 29 32.51 -15 52 49.1 – q D29
2021-08-07 17:47:54 C 22 29 42.44 -15 50 14.2 – q D29
2021-08-07 18:08:15 C 22 29 52.40 -15 47 39.0 – q D29
2021-08-10 01:35:35 C 23 01 30.36 -07 48 29.7 – V 033
2021-08-10 01:35:59 C 23 01 30.58 -07 48 25.8 – V 033
2021-08-10 01:36:24 C 23 01 30.84 -07 48 21.6 – V 033
2021-08-10 01:36:52 C 23 01 31.09 -07 48 17.4 – V 033
2021-08-11 01:42:57 C 23 16 35.82 -03 46 44.6 – V 033
2021-08-11 01:43:21 C 23 16 36.06 -03 46 40.5 – V 033
2021-08-11 01:43:46 C 23 16 36.31 -03 46 36.3 – V 033
2021-08-12 22:10:00 C 23 46 17.72 +04 14 50.4 – V 033
2021-08-12 22:10:25 C 23 46 18.00 +04 14 55.2 – V 033
2021-08-12 22:10:50 C 23 46 18.26 +04 14 59.7 – V 033
2021-08-14 12:00:24 C 00 12 41.23 +11 17 51.1 – V T08
2021-08-14 12:03:43 C 00 12 43.34 +11 18 26.8 – V T08
2021-08-14 12:09:04 C 00 12 46.85 +11 19 25.2 – V T08
2021-08-14 12:16:38 C 00 12 51.80 +11 20 49.7 – V T08
2021-08-15 02:46:05 C 00 23 04.90 +13 56 31.3 – V 033
2021-08-15 02:46:34 C 00 23 05.22 +13 56 36.9 – V 033
2021-08-15 02:47:04 C 00 23 05.55 +13 56 42.1 – V 033