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
2020-09-06 02:55:38 C 01 48 31.77 +45 56 04.9 V C95
2020-09-06 21:17:52 C 01 42 10.20 +44 53 36.8 V L04
2020-09-06 21:24:29 C 01 42 07.92 +44 53 14.4 V L04
2020-09-06 21:31:07 C 01 42 05.63 +44 52 52.1 V L04
2020-09-08 11:37:24 C 01 29 33.82 +42 39 43.8 V T05
2020-09-08 11:46:05 C 01 29 31.00 +42 39 13.2 V T05
2020-09-08 12:17:08 C 01 29 20.91 +42 37 23.0 V T05
2020-09-10 09:18:15 C 01 15 48.02 +39 54 30.3 V T08
2020-09-10 09:45:35 C 01 15 39.98 +39 52 51.3 V T08
2020-09-10 10:19:21 C 01 15 30.06 +39 50 48.7 V T08
2020-09-11 20:54:54 C 01 05 56.75 +37 43 09.6 V C27
2020-09-11 21:23:04 C 01 05 49.21 +37 41 26.3 V C27
2020-09-11 22:10:31 C 01 05 36.43 +37 38 32.5 V C27
2020-09-12 01:54:14 C 01 04 35.79 +37 24 48.3 V L63
2020-09-12 02:25:53 C 01 04 27.24 +37 22 50.9 V L63
2020-09-12 02:57:20 C 01 04 18.83 +37 20 53.4 V L63
2020-09-12 11:55:13 C 01 01 59.55 +36 47 52.0 V T05
2020-09-12 12:40:09 C 01 01 47.61 +36 45 05.5 V T05
2020-09-12 12:44:47 C 01 01 46.39 +36 44 48.1 V T05
2020-09-12 12:52:43 C 01 01 44.31 +36 44 18.4 V T05
2020-09-13 00:03:52 C 00 58 54.42 +36 02 42.8 V 160
2020-09-13 00:06:40 C 00 58 53.71 +36 02 32.3 V 160
2020-09-13 00:09:28 C 00 58 53.02 +36 02 21.8 V 160
2020-09-13 23:34:39 C 00 53 09.44 +34 35 40.2 V 160
2020-09-13 23:37:10 C 00 53 08.83 +34 35 31.1 V 160
2020-09-13 23:39:40 C 00 53 08.24 +34 35 21.7 V 160
2020-09-14 19:27:07 C 00 48 32.09 +33 22 16.6 V L18
2020-09-14 19:31:23 C 00 48 31.15 +33 22 00.8 V L18
2020-09-14 19:35:39 C 00 48 30.14 +33 21 45.0 V L18
2020-09-15 11:52:56 C 00 44 50.24 +32 22 15.5 V T05
2020-09-15 12:00:47 C 00 44 48.47 +32 21 46.9 V T05
2020-09-15 12:39:25 C 00 44 39.72 +32 19 25.1 V T05
2020-09-15 18:41:05 C 00 43 20.80 +31 57 19.7 q D29
2020-09-15 19:01:27 C 00 43 16.24 +31 56 04.5 q D29
2020-09-15 19:21:50 C 00 43 11.79 +31 54 50.5 q D29
2020-09-15 23:24:19 C 00 42 20.68 +31 40 03.9 V 160
2020-09-15 23:27:11 C 00 42 20.07 +31 39 53.7 V 160
2020-09-15 23:30:03 C 00 42 19.49 +31 39 43.5 V 160
2020-09-15 23:36:54 C 00 42 17.97 +31 39 16.4 V A17
2020-09-15 23:53:51 C 00 42 14.25 +31 38 14.9 V A17
2020-09-16 00:10:47 C 00 42 10.56 +31 37 13.5 V A17
2020-09-16 07:24:01 C 00 40 39.01 +31 11 06.7 V 703
2020-09-16 07:25:16 C 00 40 38.62 +31 11 02.4 V 703
2020-09-16 07:31:39 C 00 40 37.33 +31 10 39.0 V 703
2020-09-16 07:32:54 C 00 40 37.02 +31 10 34.6 V 703
2020-09-16 07:39:21 C 00 40 35.63 +31 10 11.4 V 703
2020-09-16 07:40:36 C 00 40 35.34 +31 10 06.3 V 703
2020-09-16 07:47:12 C 00 40 33.97 +31 09 43.1 V 703
2020-09-17 03:07:25 C 00 36 34.37 +29 59 54.9 V L63
2020-09-17 03:32:38 C 00 36 29.22 +29 58 24.1 V L63