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
2020-09-17 08:27:12 C 00 35 32.29 +29 40 59.3 V T08
2020-09-17 08:31:50 C 00 35 31.35 +29 40 42.9 V T08
2020-09-17 08:39:49 C 00 35 29.72 +29 40 14.6 V T08
2020-09-17 09:31:03 C 00 35 19.25 +29 37 13.0 V T08
2020-09-17 20:54:44 C 00 33 05.78 +28 56 28.7 V Z43
2020-09-17 21:11:30 C 00 33 02.50 +28 55 29.5 V Z43
2020-09-18 00:06:38 C 00 32 27.56 +28 45 13.0 V L18
2020-09-18 00:11:15 C 00 32 26.68 +28 44 56.2 V L18
2020-09-18 00:15:14 C 00 32 26.20 +28 44 44.7 V 160
2020-09-18 00:15:51 C 00 32 25.76 +28 44 40.3 V L18
2020-09-18 00:18:12 C 00 32 25.58 +28 44 34.1 V 160
2020-09-18 00:20:27 C 00 32 24.83 +28 44 23.6 V L18
2020-09-18 00:21:08 C 00 32 25.00 +28 44 23.2 V 160
2020-09-18 00:25:03 C 00 32 23.97 +28 44 07.1 V L18
2020-09-18 00:29:39 C 00 32 23.03 +28 43 51.4 V L18
2020-09-18 20:02:19 C 00 28 44.54 +27 35 18.1 V L18
2020-09-18 20:07:01 C 00 28 43.66 +27 35 02.1 V L18
2020-09-18 20:11:42 C 00 28 42.79 +27 34 46.3 V L18
2020-09-18 20:16:23 C 00 28 41.90 +27 34 30.0 V L18
2020-09-18 20:21:04 C 00 28 41.07 +27 34 13.5 V L18
2020-09-18 20:25:45 C 00 28 40.20 +27 33 58.3 V L18
2020-09-18 22:57:51 C 00 28 12.05 +27 25 12.0 V 160
2020-09-18 23:00:44 C 00 28 11.51 +27 25 01.4 V 160
2020-09-18 23:03:35 C 00 28 11.02 +27 24 51.9 V 160
2020-09-19 07:16:33 C 00 26 42.18 +26 56 31.3 V 703
2020-09-19 07:24:23 C 00 26 40.72 +26 56 04.4 V 703
2020-09-19 07:32:21 C 00 26 39.25 +26 55 37.2 V 703
2020-09-19 07:40:36 C 00 26 37.73 +26 55 08.9 V 703
2020-09-19 09:34:27 C 00 26 17.85 +26 48 40.2 V T05
2020-09-19 09:39:03 C 00 26 17.11 +26 48 24.8 V T05
2020-09-19 09:47:41 C 00 26 15.52 +26 47 56.1 V T05
2020-09-19 10:40:20 C 00 26 05.82 +26 44 54.6 V T05
2020-09-19 12:23:59 C 00 25 46.851 +26 38 58.32 U F52
2020-09-19 12:39:43 C 00 25 43.985 +26 38 04.02 U F52
2020-09-19 12:55:23 C 00 25 41.145 +26 37 10.09 U F52
2020-09-19 13:11:02 C 00 25 38.302 +26 36 16.14 U F52
2020-09-19 21:02:23 C 00 24 17.28 +26 09 16.7 V L18
2020-09-19 21:07:09 C 00 24 16.48 +26 09 00.6 V L18
2020-09-19 21:11:55 C 00 24 15.66 +26 08 44.8 V L18
2020-09-19 21:16:41 C 00 24 14.76 +26 08 29.0 V L18
2020-09-19 21:21:27 C 00 24 13.93 +26 08 12.4 V L18
2020-09-19 21:26:14 C 00 24 13.12 +26 07 56.0 V L18
2020-09-19 22:18:26 C 00 24 04.20 +26 04 59.9 V 160
2020-09-19 22:20:40 C 00 24 03.77 +26 04 52.9 V 160
2020-09-19 22:22:55 C 00 24 03.38 +26 04 45.2 V 160
2020-09-21 08:06:33 C 00 18 27.72 +24 12 00.1 V U63
2020-09-21 08:11:52 C 00 18 26.85 +24 11 42.6 V U63
2020-09-21 09:31:09 C 00 18 13.89 +24 07 22.6 V U63
2020-09-21 09:36:27 C 00 18 13.02 +24 07 05.2 V U63
2020-09-21 10:48:54 C 00 18 01.83 +24 03 17.7 V T08