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
2019-12-24 08:35:47 C 04 00 28.671 -12 08 45.48 U F51
2020-08-25 03:33:13 C 03 56 21.79 +57 31 02.6 V C95
2020-08-25 03:37:02 C 03 56 19.77 +57 30 57.9 V C95
2020-08-25 03:40:52 C 03 56 17.73 +57 30 53.1 V C95
2020-08-25 03:44:40 C 03 56 15.79 +57 30 48.1 V C95
2020-08-27 10:43:23 S 03 28 23.76 +56 07 40.3 L C51
2020-08-27 12:17:28 S 03 27 37.04 +56 04 55.1 L C51
2020-08-27 12:17:39 S 03 27 36.88 +56 04 53.9 L C51
2020-08-27 13:51:42 S 03 26 50.35 +56 02 08.2 L C51
2020-08-27 14:10:46 C 03 26 43.13 +56 01 53.2 V T05
2020-08-27 14:18:44 C 03 26 39.05 +56 01 39.5 V T05
2020-08-27 14:24:00 C 03 26 36.42 +56 01 30.8 V T05
2020-08-27 14:50:59 C 03 26 22.80 +56 00 42.2 V T05
2020-08-27 15:25:57 S 03 26 03.70 +55 59 20.5 L C51
2020-08-27 18:34:17 S 03 24 30.68 +55 53 41.1 L C51
2020-08-28 22:06:40 C 03 11 09.28 +55 00 29.0 V L18
2020-08-28 22:08:19 C 03 11 08.57 +55 00 24.9 V L18
2020-08-28 22:10:09 C 03 11 07.62 +55 00 21.6 V L18
2020-08-28 22:11:59 C 03 11 06.74 +55 00 17.8 V L18
2020-08-28 22:13:49 C 03 11 05.86 +55 00 15.2 V L18
2020-08-29 13:36:08 C 03 03 45.84 +54 28 05.9 V T08
2020-08-29 13:38:47 C 03 03 44.53 +54 28 00.1 V T08
2020-08-29 13:42:46 C 03 03 42.64 +54 27 51.3 V T08
2020-08-29 13:50:04 C 03 03 39.10 +54 27 35.7 V T08
2020-09-03 17:23:51 C 02 10 02.09 +49 01 04.2 q D29
2020-09-03 17:46:52 C 02 09 52.84 +48 59 53.9 q D29
2020-09-04 01:13:46 C 02 06 58.24 +48 36 51.6 V C95
2020-09-04 01:14:48 C 02 06 57.84 +48 36 48.5 V C95
2020-09-04 01:16:52 C 02 06 57.03 +48 36 42.3 V C95
2020-09-04 08:09:23 C 02 04 18.52 +48 15 16.5 V G96
2020-09-04 08:16:59 C 02 04 15.56 +48 14 52.9 V G96
2020-09-04 08:24:36 C 02 04 12.60 +48 14 29.0 V G96
2020-09-04 08:32:12 C 02 04 09.62 +48 14 05.7 V G96
2020-09-04 11:04:15 C 02 03 11.92 +48 06 09.4 V T05
2020-09-04 11:10:53 C 02 03 09.29 +48 05 48.6 V T05
2020-09-04 11:29:02 C 02 03 02.26 +48 04 52.1 V T05
2020-09-05 08:18:43 C 01 55 15.24 +46 57 48.6 V 703
2020-09-05 08:27:34 C 01 55 11.86 +46 57 20.1 V 703
2020-09-05 08:36:24 C 01 55 08.58 +46 56 51.6 V 703
2020-09-05 21:05:48 C 01 50 37.88 +46 15 21.0 V Z80
2020-09-05 21:10:48 C 01 50 36.11 +46 15 04.5 V Z80
2020-09-05 21:15:47 C 01 50 34.30 +46 14 47.0 V Z80
2020-09-05 21:20:47 C 01 50 32.49 +46 14 31.5 V Z80
2020-09-05 21:34:53 C 01 50 27.22 +46 13 51.1 V L18
2020-09-05 21:38:02 C 01 50 26.17 +46 13 40.7 V L18
2020-09-05 21:41:53 C 01 50 24.69 +46 13 28.2 V L18
2020-09-05 21:45:23 C 01 50 23.41 +46 13 16.4 V L18
2020-09-05 21:52:23 C 01 50 20.94 +46 12 53.4 V L18
2020-09-06 02:47:29 C 01 48 34.71 +45 56 32.2 V C95
2020-09-06 02:51:33 C 01 48 33.18 +45 56 18.8 V C95