428694 (2008 OS9)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6480023155 ± 2.14e-08
Semi-major axis (a)1.6012134794 AU ± 2.68e-09
Inclination (i)19.14094460° ± 4.92e-06
Long. of Asc. Node (Ω)133.37122319° ± 1.89e-06
Arg. of Perihelion (ω)288.35811709° ± 3.37e-06
Mean Anomaly (M)161.11502242° ± 4.95e-06
Mean Motion (n)0.4864502378°/day ± 1.22e-09
Perihelion dist (q)0.56362344 AU ± 3.43e-08
Aphelion dist (Q)2.63880352 AU ± 3.45e-08
Orbital Period2.02616055 yr ± 5.08e-09
Physical Parameters
H (abs. magnitude)19.30
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.365″
Uncertainty0
Orbit TypeApollo
MOID0.057708 AU
Observations Used726
Oppositions9
Arc Total2008-2025
First Observation Used2008-07-25
Last Observation Used2025-04-25
Observations (785)
Date Type RA Dec Mag Band Observatory
2008-08-03 08:27:09 C 21 43 46.21 -12 07 25.8 r H45
2008-08-03 08:29:50 C 21 43 46.20 -12 07 36.5 r H45
2008-08-03 08:43:55 C 21 43 46.18 -12 08 33.0 r H45
2008-08-03 08:45:34 C 21 43 46.16 -12 08 39.6 r H45
2008-08-03 08:48:53 C 21 43 46.15 -12 08 53.3 r H45
2008-08-03 17:06:33 C 21 43 51.05 -12 43 14.9 r 379
2008-08-03 17:09:14 C 21 43 51.03 -12 43 26.6 r 379
2008-08-03 17:17:57 C 21 43 50.98 -12 44 02.8 r 379
2008-08-04 03:26:54 C 21 44 00.37 -13 28 39.9 r H53
2008-08-04 03:28:11 C 21 44 00.43 -13 28 45.9 r H53
2008-08-04 03:29:26 C 21 44 00.41 -13 28 51.8 r H53
2008-08-04 03:30:38 C 21 44 00.38 -13 28 57.0 r H53
2008-08-04 03:32:03 C 21 44 00.45 -13 29 03.5 r H53
2008-08-04 03:33:22 C 21 44 00.44 -13 29 10.1 r H53
2008-08-04 06:27:29 C 21 44 01.01 -13 42 27.9 15.8 c 704
2008-08-04 06:43:54 C 21 44 00.95 -13 43 44.4 16.0 c 704
2008-08-04 07:00:09 C 21 44 00.83 -13 44 59.6 16.7 c 704
2008-08-05 01:05:04 C 21 44 11.59 -15 14 10.0 r J51
2008-08-05 01:10:45 C 21 44 11.55 -15 14 39.8 r J51
2008-08-05 01:16:27 C 21 44 11.49 -15 15 09.7 r J51
2008-08-05 04:41:57 C 21 44 15.00 -15 33 22.4 r H45
2008-08-05 04:43:05 C 21 44 15.00 -15 33 28.5 r H45
2008-08-05 04:44:43 C 21 44 15.00 -15 33 37.3 r H45
2008-08-05 04:46:43 C 21 44 14.99 -15 33 48.4 r H45
2008-08-05 04:49:05 C 21 44 14.98 -15 34 01.1 r H45
2008-08-05 04:51:43 C 21 44 14.98 -15 34 15.2 r H45
2008-08-05 04:53:31 C 21 44 14.97 -15 34 24.9 r H45
2008-08-06 01:10:17 C 21 44 26.77 -17 31 21.1 r J51
2008-08-06 01:17:04 C 21 44 26.74 -17 32 03.3 r J51
2008-08-06 01:23:52 C 21 44 26.70 -17 32 45.5 r J51
2008-08-06 14:29:54 C 21 44 36.30 -18 57 59.5 r 379
2008-08-06 14:31:43 C 21 44 36.26 -18 58 12.5 r 379
2008-08-06 14:33:33 C 21 44 36.28 -18 58 24.6 r 379
2008-08-06 14:46:58 C 21 44 36.16 -18 59 56.3 r 379
2008-08-06 14:48:48 C 21 44 36.15 -19 00 08.9 r 379
2008-08-06 14:55:54 C 21 44 36.13 -19 00 57.7 r 379
2008-08-06 14:59:34 C 21 44 36.11 -19 01 22.7 r 379
2008-08-06 15:05:38 C 21 44 36.05 -19 02 04.6 r 379
2008-08-06 15:07:29 C 21 44 36.06 -19 02 17.1 r 379
2008-08-06 15:09:19 C 21 44 36.04 -19 02 29.5 r 379
2008-08-06 15:21:48 C 21 44 36.00 -19 03 54.9 r 379
2008-08-06 15:23:37 C 21 44 35.98 -19 04 07.6 r 379
2008-08-06 15:25:28 C 21 44 35.95 -19 04 20.3 r 379
2008-08-06 22:26:41 C 21 44 41.47 -19 53 58.6 o 069
2008-08-06 22:27:00 C 21 44 41.35 -19 54 00.3 o 152
2008-08-06 22:27:23 C 21 44 41.41 -19 54 03.8 o 069
2008-08-06 22:27:33 C 21 44 41.38 -19 54 04.6 o 152
2008-08-06 22:28:05 C 21 44 41.41 -19 54 09.4 o 152
2008-08-06 22:28:05 C 21 44 41.44 -19 54 08.6 o 069
2008-08-06 22:28:48 C 21 44 41.41 -19 54 13.6 o 069