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
2008-08-06 22:29:30 C 21 44 41.44 -19 54 19.0 o 069
2008-08-06 22:30:12 C 21 44 41.46 -19 54 24.2 o 069
2008-08-06 22:30:49 C 21 44 41.39 -19 54 29.0 o 152
2008-08-06 22:30:56 C 21 44 41.45 -19 54 29.0 o 069
2008-08-06 22:31:22 C 21 44 41.41 -19 54 32.6 o 152
2008-08-06 22:31:37 C 21 44 41.47 -19 54 34.8 o 069
2008-08-06 22:31:54 C 21 44 41.39 -19 54 36.3 o 152
2008-08-06 22:32:19 C 21 44 41.44 -19 54 40.3 o 069
2008-08-06 22:33:03 C 21 44 41.42 -19 54 44.3 o 069
2008-08-06 22:34:03 C 21 44 41.37 -19 54 59.0 o 152
2008-08-06 22:34:32 C 21 44 41.43 -19 54 55.0 o 069
2008-08-06 22:34:37 C 21 44 41.36 -19 55 03.4 o 152
2008-08-06 22:35:09 C 21 44 41.37 -19 55 07.3 o 152
2008-08-06 22:35:13 C 21 44 41.44 -19 54 59.8 o 069
2008-08-06 22:37:57 C 21 44 41.42 -19 55 20.3 o 152
2008-08-06 22:38:29 C 21 44 41.37 -19 55 22.4 o 152
2008-08-06 22:39:02 C 21 44 41.40 -19 55 28.0 o 152
2008-08-06 22:39:36 C 21 44 41.41 -19 55 31.3 o 152
2008-08-06 22:40:08 C 21 44 41.38 -19 55 35.5 o 152
2008-08-06 22:40:41 C 21 44 41.40 -19 55 38.9 o 152
2008-08-06 22:41:13 C 21 44 41.40 -19 55 43.6 o 152
2008-08-06 22:41:46 C 21 44 41.39 -19 55 47.7 o 152
2008-08-06 22:42:18 C 21 44 41.40 -19 55 51.0 o 152
2008-08-06 22:55:22 C 21 44 41.42 -19 57 26.9 o 069
2008-08-06 22:56:03 C 21 44 41.47 -19 57 30.6 o 069
2008-08-07 00:06:25 C 21 44 42.25 -20 06 02.0 o 510
2008-08-07 00:08:16 C 21 44 42.25 -20 06 15.6 o 510
2008-08-07 00:10:09 C 21 44 42.26 -20 06 29.6 o 510
2008-08-07 00:55:16 C 21 44 43.88 -20 11 46.1 r J51
2008-08-07 01:00:55 C 21 44 43.83 -20 12 27.8 r J51
2008-08-07 01:06:35 C 21 44 43.79 -20 13 09.6 r J51
2008-08-07 22:08:15 C 21 45 00.71 -23 01 38.8 o 152
2008-08-07 22:09:14 C 21 45 00.72 -23 01 47.2 o 152
2008-08-07 22:10:14 C 21 45 00.71 -23 01 55.7 o 152
2008-08-07 22:11:15 C 21 45 00.71 -23 02 04.2 o 152
2008-08-07 22:12:14 C 21 45 00.70 -23 02 12.7 o 152
2008-08-07 22:14:14 C 21 45 00.66 -23 02 30.5 o 152
2008-08-07 22:15:15 C 21 45 00.68 -23 02 39.3 o 152
2008-08-07 22:16:14 C 21 45 00.71 -23 02 48.2 o 152
2008-08-07 22:17:15 C 21 45 00.70 -23 02 55.9 o 152
2008-08-07 22:18:14 C 21 45 00.67 -23 03 05.2 o 152
2008-08-07 22:19:14 C 21 45 00.68 -23 03 14.5 o 152
2008-08-07 22:20:15 C 21 45 00.67 -23 03 21.6 o 152
2008-08-07 22:21:14 C 21 45 00.68 -23 03 30.4 o 152
2008-08-07 22:22:15 C 21 45 00.69 -23 03 39.1 o 152
2008-08-07 22:23:14 C 21 45 00.68 -23 03 48.1 o 152
2008-08-07 22:24:15 C 21 45 00.70 -23 03 56.7 o 152
2008-08-07 22:25:14 C 21 45 00.69 -23 04 05.5 o 152
2008-08-07 22:26:15 C 21 45 00.68 -23 04 14.3 o 152
2008-08-07 22:27:14 C 21 45 00.71 -23 04 22.7 o 152