IAA RAS IAA Minor Planet Database

2021 CO9

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4995105231 ± 2.94e-07
Semi-major axis (a)2.5688940476 AU ± 6.62e-08
Inclination (i)25.66880817° ± 2.02e-05
Long. of Asc. Node (Ω)174.89145148° ± 9.15e-06
Arg. of Perihelion (ω)263.65862076° ± 6.14e-05
Mean Anomaly (M)92.48673880° ± 1.46e-05
Mean Motion (n)0.2393828248°/day ± 9.25e-09
Perihelion dist (q)1.28570444 AU ± 7.57e-07
Aphelion dist (Q)3.85208366 AU ± 7.63e-07
Orbital Period4.11736424 yr ± 1.59e-07
Physical Parameters
H (abs. magnitude)19.80
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.136″
Uncertainty0
Orbit TypeAmor
MOID0.535344 AU
Observations Used42
Oppositions6
Arc Total2017-2025
First Observation Used2017-03-20
Last Observation Used2025-03-26
Observations (44)
Date Type RA Dec Mag Band Observatory
2017-03-20 09:42:43 C 13 25 20.398 +04 03 58.03 – V F51
2017-03-20 10:03:05 C 13 25 19.594 +04 04 12.44 – V F51
2017-03-20 10:23:30 C 13 25 18.810 +04 04 26.94 – V F51
2017-03-26 12:55:40 C 13 19 37.916 +05 46 52.41 – V F51
2017-03-26 13:11:57 C 13 19 37.252 +05 47 03.39 – V F51
2017-04-03 12:59:43 C 13 11 48.240 +07 51 22.10 – V F51
2017-04-03 13:16:13 C 13 11 47.551 +07 51 32.28 – V F51
2021-02-11 12:59:28 C 12 35 35.604 -09 06 11.56 – U F51
2021-02-11 13:15:19 C 12 35 35.406 -09 06 00.13 – U F51
2021-02-11 13:47:02 C 12 35 34.976 -09 05 37.05 – U F51
2021-02-12 07:59:49 C 12 35 22.08 -08 52 09.5 – V 807
2021-02-12 08:05:25 C 12 35 22.01 -08 52 05.5 – V 807
2021-02-12 08:11:01 C 12 35 21.93 -08 52 01.3 – V 807
2021-02-14 07:44:09 C 12 34 42.27 -08 16 07.7 – V 807
2021-02-14 07:50:19 C 12 34 42.15 -08 16 02.9 – V 807
2021-02-14 07:56:46 C 12 34 42.04 -08 15 58.0 – V 807
2021-02-19 08:00:54 C 12 32 24.53 -06 39 07.0 – V 807
2021-02-19 08:09:19 C 12 32 24.34 -06 38 59.9 – V 807
2021-02-19 08:17:45 C 12 32 24.14 -06 38 53.0 – V 807
2021-02-20 08:15:02 C 12 31 50.67 -06 18 35.1 – V 807
2021-02-20 08:20:38 C 12 31 50.53 -06 18 30.3 – V 807
2021-02-20 08:26:14 C 12 31 50.37 -06 18 25.2 – V 807
2021-02-21 07:45:49 C 12 31 16.07 -05 58 22.1 – V 807
2021-02-21 07:52:00 C 12 31 15.87 -05 58 17.0 – V 807
2021-02-21 07:58:26 C 12 31 15.72 -05 58 11.2 – V 807
2021-03-03 07:47:44 C 12 23 52.30 -02 19 24.3 – V 807
2021-03-03 07:54:08 C 12 23 52.08 -02 19 18.7 – V 807
2021-03-03 07:59:43 C 12 23 51.89 -02 19 12.5 – V 807
2021-03-08 06:24:41 C 12 19 26.67 -00 26 24.7 – u 807
2021-03-08 06:30:01 C 12 19 26.47 -00 26 19.4 – u 807
2021-03-08 06:35:21 C 12 19 26.26 -00 26 14.5 – u 807
2021-03-13 06:02:55 C 12 14 41.12 +01 27 13.3 – V 807
2021-03-13 06:08:14 C 12 14 40.90 +01 27 18.2 – V 807
2021-03-13 06:13:33 C 12 14 40.67 +01 27 23.2 – V 807
2021-03-15 09:58:19 C 12 12 34.856 +02 15 35.97 – U F51
2021-03-15 10:16:51 C 12 12 34.074 +02 15 53.30 – U F51
2021-03-15 10:17:47 C 12 12 34.043 +02 15 54.24 – U F51
2021-03-15 10:36:22 C 12 12 33.241 +02 16 11.65 – U F51
2021-03-15 10:56:02 C 12 12 32.402 +02 16 29.66 – U F51
2021-03-15 10:56:59 C 12 12 32.361 +02 16 30.67 – U F51
2024-11-02 15:25:15 C 08 38 59.347 -19 18 48.78 – V T12
2024-11-02 15:36:03 C 08 39 00.600 -19 18 57.30 – V T12
2025-03-26 03:47:26 C 10 10 29.10 +05 27 14.3 – V H21
2025-03-26 03:51:44 C 10 10 29.09 +05 27 18.4 – V H21