IAA RAS IAA Minor Planet Database

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
2020-09-21 10:54:54 C 00 18 00.84 +24 02 58.2 – V T08
2020-09-21 11:06:33 C 00 17 58.92 +24 02 20.1 – V T08
2020-09-21 11:23:19 C 00 17 56.18 +24 01 25.0 – V T08
2020-09-21 21:21:47 C 00 16 23.24 +23 28 47.0 – V L18
2020-09-21 21:22:47 C 00 16 23.11 +23 28 44.1 – V L18
2020-09-21 21:23:47 C 00 16 22.92 +23 28 40.9 – V L18
2020-09-21 21:24:47 C 00 16 22.75 +23 28 37.3 – V L18
2020-09-21 21:25:48 C 00 16 22.59 +23 28 34.6 – V L18
2020-09-21 21:27:48 C 00 16 22.27 +23 28 27.9 – V L18
2020-09-21 21:28:48 C 00 16 22.09 +23 28 24.0 – V L18
2020-09-21 21:29:49 C 00 16 21.93 +23 28 21.5 – V L18
2020-09-21 21:30:49 C 00 16 21.74 +23 28 18.6 – V L18
2020-09-21 21:31:49 C 00 16 21.65 +23 28 15.5 – V L18
2020-09-21 21:32:49 C 00 16 21.47 +23 28 11.8 – V L18
2020-09-21 21:33:50 C 00 16 21.32 +23 28 08.4 – V L18
2020-09-21 21:35:50 C 00 16 20.99 +23 28 00.9 – V L18
2020-09-22 20:14:13 C 00 12 57.32 +22 15 44.2 – V K88
2020-09-22 20:15:25 C 00 12 57.12 +22 15 40.4 – V K88
2020-09-22 20:16:41 C 00 12 56.93 +22 15 36.5 – V K88
2020-09-23 07:48:24 C 00 11 16.47 +21 39 39.0 – V 703
2020-09-23 07:56:33 C 00 11 15.26 +21 39 13.7 – V 703
2020-09-23 08:04:41 C 00 11 14.02 +21 38 48.7 – V 703
2020-09-23 08:12:49 C 00 11 12.84 +21 38 23.0 – V 703
2020-09-23 11:52:40 C 00 10 41.49 +21 27 05.8 – V T05
2020-09-23 11:55:18 C 00 10 41.10 +21 26 57.6 – V T05
2020-09-23 11:57:16 C 00 10 40.83 +21 26 51.6 – V T05
2020-09-23 11:59:56 C 00 10 40.45 +21 26 43.3 – V T05
2020-09-23 12:05:12 C 00 10 39.66 +21 26 27.1 – V T05
2020-09-23 12:09:51 C 00 10 38.97 +21 26 13.1 – V T05
2020-09-23 12:31:06 C 00 10 35.88 +21 25 06.8 – V T05
2020-09-23 22:21:52 C 00 09 14.82 +20 54 46.4 – V Z43
2020-09-23 22:40:50 C 00 09 12.15 +20 53 48.7 – V Z43
2020-09-23 22:52:52 C 00 09 10.48 +20 53 11.7 – V Z43
2020-09-24 13:31:16 C 00 07 12.34 +20 09 06.4 – q D29
2020-09-24 13:51:38 C 00 07 09.56 +20 08 05.8 – q D29
2020-09-24 14:12:00 C 00 07 06.77 +20 07 05.3 – q D29
2020-09-24 22:02:26 C 00 06 04.67 +19 43 44.7 – V K88
2020-09-24 22:03:38 C 00 06 04.53 +19 43 41.0 – V K88
2020-09-24 22:05:05 C 00 06 04.34 +19 43 36.7 – V K88
2020-09-24 22:15:56 C 00 06 02.89 +19 43 04.7 – V K88
2020-09-24 22:17:17 C 00 06 02.71 +19 43 00.6 – V K88
2020-09-24 22:18:44 C 00 06 02.51 +19 42 56.5 – V K88
2020-09-25 08:29:56 C 00 04 44.64 +19 13 13.4 – V T08
2020-09-25 08:32:41 C 00 04 44.27 +19 13 05.6 – V T08
2020-09-25 08:40:06 C 00 04 43.29 +19 12 43.6 – V T08
2020-09-25 08:49:25 C 00 04 42.07 +19 12 16.8 – V T08
2020-09-25 22:31:22 C 00 02 59.60 +18 32 39.7 – V Z80
2020-09-25 22:38:24 C 00 02 58.72 +18 32 20.0 – V Z80
2020-09-25 22:44:39 C 00 02 57.88 +18 32 01.9 – V Z80
2020-09-26 06:24:48 C 00 02 02.12 +18 10 22.0 – V 703