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
2025-10-02 09:46:31 C 02 14 11.890 +06 47 34.40 V G96
2025-10-02 09:53:59 C 02 14 11.332 +06 47 28.54 V G96
2025-10-02 10:01:26 C 02 14 10.856 +06 47 23.46 V G96
2025-10-02 11:57:32 C 02 14 02.738 +06 46 03.54 X F51
2025-10-02 12:17:14 C 02 14 01.306 +06 45 49.84 X F51
2025-10-02 12:36:43 C 02 13 59.900 +06 45 36.04 X F51
2025-10-11 17:11:53 C 01 58 05.509 +04 11 46.18 W O18
2025-10-11 18:11:16 C 01 58 01.121 +04 11 06.02 W O18
2025-10-12 17:09:27 C 01 56 21.173 +03 55 30.64 W O18
2025-10-12 18:08:46 C 01 56 16.783 +03 54 50.39 W O18
2025-10-13 09:10:17 C 01 55 11.681 +03 44 45.00 X F51
2025-10-13 09:26:32 C 01 55 10.455 +03 44 34.38 X F51
2025-10-13 09:42:45 C 01 55 09.264 +03 44 23.26 X F51
2025-10-13 09:59:18 C 01 55 08.053 +03 44 12.16 X F51
2025-10-14 18:32:30 C 01 52 46.974 +03 22 27.48 W O18
2025-10-14 19:16:25 C 01 52 43.741 +03 21 58.58 W O18
2025-10-15 17:13:23 C 01 51 09.391 +03 07 31.21 W O18
2025-10-15 18:13:17 C 01 51 05.037 +03 06 52.08 W O18
2025-10-16 17:01:02 C 01 49 27.495 +02 52 01.97 W O18
2025-10-16 17:06:20 C 01 49 27.113 +02 51 58.39 W O18
2025-10-16 18:00:33 C 01 49 23.187 +02 51 23.49 W O18
2025-10-19 16:09:46 C 01 44 27.208 +02 06 56.64 W O18
2025-10-19 17:09:16 C 01 44 22.997 +02 06 19.64 W O18
2025-10-20 16:01:32 C 01 42 48.264 +01 52 16.55 W O18
2025-10-20 18:19:55 C 01 42 38.561 +01 50 52.16 W O18
2025-10-21 16:06:28 C 01 41 09.407 +01 37 43.13 W O18
2025-10-21 17:05:54 C 01 41 05.341 +01 37 07.75 W O18
2025-10-24 16:40:56 C 01 36 19.054 +00 55 30.12 W O18
2025-10-24 17:57:27 C 01 36 13.975 +00 54 47.00 W O18
2025-10-25 18:39:32 C 01 34 37.991 +00 41 01.37 W O18
2025-10-25 19:33:18 C 01 34 34.473 +00 40 31.72 W O18
2025-10-26 16:42:59 C 01 33 13.784 +00 29 00.08 W O18
2025-10-26 17:35:03 C 01 33 10.441 +00 28 32.10 W O18
2025-10-27 17:40:15 C 01 31 39.888 +00 15 42.72 W O18
2025-10-27 18:32:16 C 01 31 36.603 +00 15 15.51 W O18
2025-10-29 07:59:44 C 01 29 19.397 -00 04 00.57 X F51
2025-10-29 08:17:12 C 01 29 18.333 -00 04 09.51 X F51
2025-10-29 08:34:44 C 01 29 17.241 -00 04 18.46 X F51
2025-10-29 08:52:17 C 01 29 16.152 -00 04 27.05 X F51
2025-10-29 17:30:31 C 01 28 44.945 -00 08 48.86 W O18
2025-10-29 17:39:25 C 01 28 44.414 -00 08 53.25 W O18
2025-10-31 17:07:38 C 01 25 57.623 -00 31 57.95 W O18
2025-10-31 18:03:40 C 01 25 54.353 -00 32 24.39 W O18
2025-11-01 17:23:56 C 01 24 35.049 -00 43 16.09 W O18
2025-11-01 18:33:12 C 01 24 31.084 -00 43 47.71 W O18
2025-11-10 07:53:15 C 01 14 12.861 -02 05 40.10 X F52
2025-11-10 08:10:12 C 01 14 12.096 -02 05 45.86 X F52
2025-11-10 08:27:09 C 01 14 11.305 -02 05 51.62 X F52