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
2020-09-26 06:39:51 C 00 02 00.22 +18 09 40.2 V 703
2020-09-26 06:47:22 C 00 01 59.34 +18 09 19.0 V 703
2020-09-26 07:17:16 C 00 01 56.43 +18 07 56.9 V T05
2020-09-26 07:20:34 C 00 01 56.05 +18 07 47.9 V T05
2020-09-26 07:49:53 C 00 01 52.40 +18 06 25.7 V T05
2020-09-26 08:15:36 C 00 01 49.20 +18 05 13.7 V T05
2020-09-27 09:20:37 C 23 58 54.26 +16 55 59.0 V T05
2020-09-27 09:49:54 C 23 58 50.81 +16 54 39.8 V T05
2020-09-27 10:20:08 C 23 58 47.26 +16 53 18.1 V T05
2020-09-27 10:34:56 C 23 58 45.53 +16 52 37.8 V T05
2020-10-04 11:06:40 C 23 43 20.167 +10 14 11.71 U F52
2020-10-04 11:24:08 C 23 43 18.825 +10 13 36.11 U F52
2020-10-04 11:41:40 C 23 43 17.490 +10 13 00.15 U F52
2020-10-04 11:59:09 C 23 43 16.151 +10 12 24.63 U F52
2020-10-05 07:49:44 C 23 41 51.85 +09 32 41.0 V 703
2020-10-05 07:57:50 C 23 41 51.28 +09 32 25.4 V 703
2020-10-05 08:05:56 C 23 41 50.70 +09 32 09.3 V 703
2020-10-05 08:14:02 C 23 41 50.18 +09 31 53.4 V 703
2020-10-06 05:22:50 C 23 40 25.64 +08 51 08.5 V U55
2020-10-06 05:30:36 C 23 40 25.11 +08 50 53.9 V U55
2020-10-06 05:38:49 C 23 40 24.56 +08 50 38.3 V U55
2020-10-06 06:21:43 C 23 40 21.51 +08 49 21.3 V 703
2020-10-06 06:29:30 C 23 40 21.02 +08 49 06.3 V 703
2020-10-06 06:37:17 C 23 40 20.45 +08 48 51.5 V 703
2020-10-06 06:45:04 C 23 40 19.85 +08 48 37.0 V 703
2020-10-06 11:30:33 C 23 40 01.02 +08 39 43.6 V T08
2020-10-06 11:35:52 C 23 40 00.74 +08 39 34.0 V T08
2020-10-06 11:43:50 C 23 40 00.17 +08 39 19.4 V T08
2020-10-06 11:59:53 C 23 39 59.11 +08 38 49.5 V T08
2020-10-07 05:52:00 C 23 38 52.81 +08 05 59.9 V G96
2020-10-07 06:00:06 C 23 38 52.29 +08 05 45.5 V G96
2020-10-07 06:08:11 C 23 38 51.77 +08 05 30.8 V G96
2020-10-07 06:16:15 C 23 38 51.24 +08 05 16.2 V G96
2020-10-07 10:15:48 C 23 38 36.522 +07 58 08.39 U F51
2020-10-07 10:31:49 C 23 38 35.496 +07 57 39.66 U F51
2020-10-07 10:34:15 C 23 38 35.33 +07 57 35.7 V T08
2020-10-07 10:47:54 C 23 38 34.475 +07 57 10.97 U F51
2020-10-07 11:08:28 C 23 38 33.18 +07 56 34.3 V T08
2020-10-07 11:18:44 C 23 38 32.52 +07 56 15.8 V T08
2020-10-07 21:42:18 C 23 37 56.21 +07 37 47.6 V 130
2020-10-07 21:49:11 C 23 37 55.80 +07 37 35.1 V 130
2020-10-07 22:42:32 C 23 37 52.47 +07 36 01.4 V 160
2020-10-07 22:45:40 C 23 37 52.24 +07 35 56.0 V 160
2020-10-08 00:26:11 C 23 37 47.17 +07 33 03.1 q W46
2020-10-08 00:53:38 C 23 37 45.59 +07 32 15.0 q W46
2020-10-08 01:32:01 C 23 37 43.29 +07 31 08.3 q W46
2020-10-08 05:14:29 C 23 37 30.28 +07 24 43.3 V 703
2020-10-08 05:22:44 C 23 37 29.74 +07 24 29.9 V 703
2020-10-08 05:30:59 C 23 37 29.30 +07 24 14.3 V 703
2020-10-08 05:39:14 C 23 37 28.81 +07 24 00.7 V 703