285990 (2001 SK9)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7894131168 ± 2.37e-08
Semi-major axis (a)1.7854348518 AU ± 1.57e-09
Inclination (i)25.84030503° ± 6.18e-06
Long. of Asc. Node (Ω)195.52136492° ± 4.46e-06
Arg. of Perihelion (ω)34.82443230° ± 5.43e-06
Mean Anomaly (M)89.93084301° ± 3.28e-06
Mean Motion (n)0.4131390668°/day ± 5.46e-10
Perihelion dist (q)0.37598916 AU ± 4.22e-08
Aphelion dist (Q)3.19488054 AU ± 4.23e-08
Orbital Period2.38570100 yr ± 3.15e-09
Physical Parameters
H (abs. magnitude)17.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.252″
Uncertainty0
Orbit TypeApollo
MOID0.216238 AU
Observations Used463
Oppositions14
Arc Total2001-2025
First Observation Used2001-09-17
Last Observation Used2025-11-10
Observations (498)
Date Type RA Dec Mag Band Observatory
2001-09-17 08:48:09 C 01 53 05.10 +16 47 53.1 19.5 c 704
2001-09-17 09:09:12 C 01 53 02.79 +16 47 26.7 19.7 c 704
2001-09-17 09:30:44 C 01 53 00.38 +16 47 00.4 19.5 c 704
2001-09-18 07:00:34 C 01 50 42.85 +16 21 04.4 d 691
2001-09-18 07:06:40 C 01 50 42.20 +16 20 57.3 d 691
2001-09-18 07:12:41 C 01 50 41.53 +16 20 49.7 d 691
2001-09-18 08:24:12 C 01 50 33.69 +16 19 23.3 d 684
2001-09-18 08:27:42 C 01 50 33.31 +16 19 18.7 d 684
2001-09-18 08:31:00 C 01 50 32.99 +16 19 14.8 d 684
2001-09-18 18:00:10 C 01 49 31.55 +16 07 56.8 m 422
2001-09-18 18:03:49 C 01 49 31.10 +16 07 52.2 m 422
2001-09-18 22:12:45 C 01 49 04.96 +16 02 34.0 c 046
2001-09-18 22:14:33 C 01 49 04.81 +16 02 32.1 c 046
2001-09-18 22:18:10 C 01 49 04.39 +16 02 28.0 c 046
2001-09-18 22:19:58 C 01 49 04.20 +16 02 26.2 c 046
2001-09-19 01:31:05 C 01 48 43.27 +15 58 33.3 d 557
2001-09-19 01:33:47 C 01 48 42.96 +15 58 30.1 d 557
2001-09-19 01:36:27 C 01 48 42.68 +15 58 26.8 d 557
2001-09-19 01:39:08 C 01 48 42.38 +15 58 24.0 d 557
2001-09-19 09:21:55 C 01 47 52.68 +15 49 02.0 19.4 c 704
2001-09-19 09:33:53 C 01 47 51.35 +15 48 48.1 19.0 c 704
2001-09-19 09:42:26 C 01 47 50.40 +15 48 37.5 19.5 c 704
2001-09-19 09:54:53 C 01 47 48.98 +15 48 22.4 19.6 c 704
2001-09-19 10:02:58 C 01 47 48.16 +15 48 12.3 19.3 c 704
2001-09-19 10:15:52 C 01 47 46.71 +15 47 56.2 19.5 c 704
2001-09-19 10:23:32 C 01 47 45.89 +15 47 47.2 19.2 c 704
2001-09-19 10:38:07 C 01 47 44.25 +15 47 28.9 19.7 c 704
2001-09-19 10:44:06 C 01 47 43.63 +15 47 21.9 19.3 c 704
2001-09-19 10:59:33 C 01 47 41.91 +15 47 04.1 19.8 c 704
2001-09-19 11:16:12 C 01 47 40.13 +15 46 42.4 d 691
2001-09-19 11:21:52 C 01 47 39.50 +15 46 35.5 d 691
2001-09-19 11:28:26 C 01 47 38.78 +15 46 27.6 d 691
2001-09-19 23:23:42 C 01 46 22.39 +15 31 50.1 c 046
2001-09-19 23:26:06 C 01 46 22.15 +15 31 47.1 c 046
2001-09-19 23:28:28 C 01 46 21.99 +15 31 44.8 c 046
2001-09-19 23:30:54 C 01 46 21.56 +15 31 41.2 c 046
2001-09-20 07:38:04 C 01 45 29.20 +15 21 47.1 19.5 c 704
2001-09-20 07:56:39 C 01 45 27.08 +15 21 24.6 19.6 c 704
2001-09-20 07:58:31 C 01 45 26.96 +15 21 21.9 19.7 c 704
2001-09-20 08:22:43 C 01 45 24.38 +15 20 52.3 19.9 c 704
2001-09-20 08:43:09 C 01 45 22.04 +15 20 27.1 19.8 c 704
2001-09-20 08:45:00 C 01 45 21.81 +15 20 24.9 19.6 c 704
2001-09-20 09:03:36 C 01 45 19.79 +15 20 02.0 19.9 c 704
2001-09-20 09:05:26 C 01 45 19.55 +15 19 59.6 19.2 c 704
2001-09-20 09:32:35 C 01 45 16.62 +15 19 27.4 d 291
2001-09-20 10:19:17 C 01 45 11.26 +15 18 28.3 c 649
2001-09-20 10:19:17 C 01 45 11.49 +15 18 30.1 d 291
2001-09-20 10:22:10 C 01 45 10.99 +15 18 24.5 c 649
2001-09-20 10:26:53 C 01 45 10.48 +15 18 18.6 c 649
2001-09-20 10:48:37 C 01 45 08.32 +15 17 54.3 d 291