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
2008-08-07 22:29:15 C 21 45 00.65 -23 04 39.2 o 152
2008-08-07 22:30:14 C 21 45 00.67 -23 04 48.5 o 152
2008-08-07 22:31:15 C 21 45 00.67 -23 04 56.7 o 152
2008-08-07 22:32:14 C 21 45 00.68 -23 05 05.7 o 152
2008-08-07 22:33:15 C 21 45 00.71 -23 05 14.7 o 152
2008-08-07 22:35:15 C 21 45 00.67 -23 05 31.9 o 152
2008-08-07 22:36:14 C 21 45 00.66 -23 05 40.2 o 152
2008-08-07 22:37:14 C 21 45 00.67 -23 05 49.2 o 152
2008-08-07 22:38:15 C 21 45 00.68 -23 05 57.3 o 152
2008-08-07 22:39:14 C 21 45 00.68 -23 06 06.5 o 152
2008-08-07 22:40:15 C 21 45 00.70 -23 06 15.6 o 152
2008-08-07 22:41:14 C 21 45 00.69 -23 06 23.7 o 152
2008-08-07 22:42:15 C 21 45 00.70 -23 06 32.4 o 152
2008-08-07 22:43:14 C 21 45 00.68 -23 06 40.6 o 152
2008-08-07 22:44:15 C 21 45 00.67 -23 06 50.0 o 152
2008-08-07 22:45:14 C 21 45 00.68 -23 06 58.6 o 152
2008-08-07 22:46:14 C 21 45 00.70 -23 07 06.6 o 152
2008-08-07 22:47:15 C 21 45 00.69 -23 07 16.9 o 152
2008-08-07 22:48:14 C 21 45 00.69 -23 07 24.9 o 152
2008-08-07 22:50:14 C 21 45 00.69 -23 07 42.2 o 152
2008-08-07 22:51:15 C 21 45 00.71 -23 07 50.8 o 152
2008-08-07 22:52:14 C 21 45 00.71 -23 07 59.3 o 152
2008-08-07 22:53:15 C 21 45 00.66 -23 08 07.3 o 152
2008-08-07 22:54:14 C 21 45 00.67 -23 08 16.9 o 152
2008-08-07 22:55:14 C 21 45 00.66 -23 08 24.2 o 152
2008-08-07 22:56:15 C 21 45 00.68 -23 08 33.5 o 152
2008-08-07 22:57:14 C 21 45 00.70 -23 08 43.3 o 152
2008-08-07 22:58:15 C 21 45 00.65 -23 08 51.3 o 152
2008-08-07 22:59:14 C 21 45 00.66 -23 08 59.7 o 152
2008-08-07 23:00:15 C 21 45 00.59 -23 09 10.3 o 152
2008-08-07 23:01:14 C 21 45 00.62 -23 09 18.7 o 152
2008-08-07 23:02:15 C 21 45 00.63 -23 09 27.1 o 152
2008-08-07 23:03:14 C 21 45 00.61 -23 09 35.6 o 152
2008-08-07 23:04:14 C 21 45 00.62 -23 09 44.0 o 152
2008-08-07 23:05:15 C 21 45 00.63 -23 09 53.2 o 152
2008-08-07 23:06:14 C 21 45 00.60 -23 10 01.4 o 152
2008-08-07 23:07:15 C 21 45 00.60 -23 10 10.4 o 152
2008-08-07 23:08:14 C 21 45 00.62 -23 10 19.5 o 152
2008-08-07 23:09:15 C 21 45 00.62 -23 10 27.8 o 152
2008-08-07 23:11:15 C 21 45 00.61 -23 10 45.6 o 152
2008-08-07 23:12:14 C 21 45 00.61 -23 10 54.2 o 152
2008-08-07 23:13:14 C 21 45 00.60 -23 11 02.8 o 152
2008-08-07 23:14:15 C 21 45 00.58 -23 11 10.7 o 152
2008-08-07 23:15:14 C 21 45 00.60 -23 11 18.6 o 152
2008-08-07 23:16:15 C 21 45 00.63 -23 11 28.8 o 152
2008-08-07 23:17:14 C 21 45 00.60 -23 11 36.7 o 152
2008-08-07 23:18:15 C 21 45 00.61 -23 11 46.1 o 152
2008-08-07 23:19:14 C 21 45 00.56 -23 11 53.6 o 152
2008-08-07 23:20:15 C 21 45 00.57 -23 12 03.0 o 152
2008-08-07 23:21:14 C 21 45 00.57 -23 12 11.3 o 152