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
2020-10-08 06:35:08 C 23 37 26.019 +07 22 26.69 U F52
2020-10-08 07:06:40 C 23 37 24.121 +07 21 32.35 U F52
2020-10-08 07:22:26 C 23 37 23.176 +07 21 05.28 U F52
2020-10-08 09:45:50 C 23 37 14.55 +07 16 59.2 V T05
2020-10-08 09:50:27 C 23 37 14.27 +07 16 51.2 V T05
2020-10-08 09:58:22 C 23 37 13.78 +07 16 37.9 V T05
2020-10-08 10:19:19 C 23 37 12.54 +07 16 01.7 V T05
2020-10-11 07:36:21 C 23 33 41.868 +05 24 55.05 U F52
2020-10-11 07:52:16 C 23 33 41.089 +05 24 31.17 U F52
2020-10-11 08:24:12 C 23 33 39.521 +05 23 43.35 U F52
2020-10-14 09:27:46 C 23 30 41.52 +03 41 42.3 V T08
2020-10-14 09:32:24 C 23 30 41.35 +03 41 36.5 V T08
2020-10-14 09:43:17 C 23 30 40.88 +03 41 22.4 V T08
2020-10-14 09:59:53 C 23 30 40.29 +03 41 00.8 V T08
2020-10-17 04:38:48 C 23 28 34.09 +02 19 57.5 V G96
2020-10-17 04:46:14 C 23 28 33.86 +02 19 49.0 V G96
2020-10-17 04:53:40 C 23 28 33.62 +02 19 40.5 V G96
2020-10-18 08:15:36 C 23 27 50.49 +01 49 29.0 V T08
2020-10-18 08:20:15 C 23 27 50.40 +01 49 24.1 V T08
2020-10-18 08:28:15 C 23 27 50.15 +01 49 15.2 V T08
2020-10-18 09:15:53 C 23 27 48.85 +01 48 24.2 V T08
2020-10-31 06:29:14 C 23 24 33.494 -02 15 40.65 U F51
2020-10-31 06:46:47 C 23 24 33.470 -02 15 50.44 U F51
2020-10-31 07:04:23 C 23 24 33.448 -02 16 00.20 U F51
2020-10-31 07:22:02 C 23 24 33.441 -02 16 09.90 U F51
2024-11-29 10:57:55 C 06 04 52.075 -17 21 26.17 X F52
2024-11-29 11:13:22 C 06 04 51.104 -17 21 38.94 X F52
2024-11-29 11:44:16 C 06 04 49.149 -17 22 04.29 X F52
2024-12-04 11:06:01 C 05 56 49.061 -18 58 10.61 X F51
2024-12-04 11:22:47 C 05 56 47.807 -18 58 23.77 X F51
2024-12-04 11:56:20 C 05 56 45.302 -18 58 50.11 X F51
2024-12-23 08:49:07 C 05 15 33.615 -23 47 38.00 X F51
2024-12-23 09:04:49 C 05 15 31.923 -23 47 44.95 X F51
2024-12-23 09:20:29 C 05 15 30.231 -23 47 51.71 X F51
2025-01-06 05:00:43 C 04 39 42.210 -25 03 33.41 V G96
2025-01-06 05:07:46 C 04 39 41.490 -25 03 33.70 V G96
2025-01-06 05:14:46 C 04 39 40.676 -25 03 33.73 V G96
2025-01-06 05:21:44 C 04 39 39.946 -25 03 33.41 V G96
2025-08-27 12:48:40 C 02 56 15.849 +15 19 42.97 X F51
2025-08-27 13:04:19 C 02 56 15.515 +15 19 36.21 X F51
2025-08-27 13:20:02 C 02 56 15.159 +15 19 29.54 X F51
2025-08-27 13:35:45 C 02 56 14.822 +15 19 22.90 X F51
2025-09-22 13:58:09 C 02 29 54.346 +09 30 37.35 X F51
2025-09-22 14:16:28 C 02 29 53.191 +09 30 25.18 X F51
2025-09-22 14:34:48 C 02 29 52.032 +09 30 12.83 X F51
2025-09-22 14:53:09 C 02 29 50.877 +09 30 00.62 X F51
2025-09-28 11:03:14 C 02 20 45.458 +07 54 00.54 X F51
2025-09-28 11:21:24 C 02 20 44.215 +07 53 47.95 X F51
2025-09-28 11:39:38 C 02 20 42.932 +07 53 35.34 X F51
2025-10-02 09:39:03 C 02 14 12.448 +06 47 39.19 V G96