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
2008-08-01 02:58:12 C 21 43 16.73 -09 03 06.7 r J75
2008-08-01 05:23:34 C 21 43 20.10 -09 10 17.5 o H55
2008-08-01 05:27:13 C 21 43 20.10 -09 10 28.4 o H55
2008-08-01 05:30:19 C 21 43 20.10 -09 10 37.6 o H55
2008-08-01 08:54:55 C 21 43 19.97 -09 20 51.5 r H45
2008-08-01 08:56:11 C 21 43 19.97 -09 20 55.6 r H45
2008-08-01 08:59:53 C 21 43 19.97 -09 21 06.5 r H45
2008-08-01 09:01:47 C 21 43 19.97 -09 21 12.4 r H45
2008-08-01 09:07:32 C 21 43 19.95 -09 21 29.9 r H45
2008-08-01 09:10:53 C 21 43 19.95 -09 21 39.8 r H45
2008-08-01 09:14:25 C 21 43 19.95 -09 21 50.2 r H45
2008-08-01 15:40:52 C 21 43 25.00 -09 41 50.8 r 900
2008-08-01 15:47:59 C 21 43 24.99 -09 42 13.4 r 900
2008-08-01 21:23:34 C 21 43 28.84 -10 00 20.7 o 069
2008-08-01 21:24:15 C 21 43 28.83 -10 00 23.5 o 069
2008-08-01 21:24:59 C 21 43 28.84 -10 00 26.0 o 069
2008-08-01 21:25:41 C 21 43 28.85 -10 00 28.1 o 069
2008-08-01 21:26:22 C 21 43 28.84 -10 00 30.1 o 069
2008-08-01 21:27:06 C 21 43 28.85 -10 00 32.9 o 069
2008-08-01 21:27:48 C 21 43 28.79 -10 00 35.0 o 069
2008-08-01 21:28:30 C 21 43 28.89 -10 00 37.4 o 069
2008-08-01 21:29:13 C 21 43 28.84 -10 00 40.2 o 069
2008-08-01 21:29:55 C 21 43 28.85 -10 00 41.7 o 069
2008-08-01 21:30:37 C 21 43 28.85 -10 00 45.2 o 069
2008-08-01 21:31:20 C 21 43 28.84 -10 00 46.2 o 069
2008-08-01 21:32:03 C 21 43 28.87 -10 00 48.4 o 069
2008-08-01 21:32:44 C 21 43 28.88 -10 00 51.1 o 069
2008-08-01 21:33:27 C 21 43 28.89 -10 00 53.9 o 069
2008-08-01 21:34:10 C 21 43 28.82 -10 00 56.0 o 069
2008-08-01 21:34:51 C 21 43 28.87 -10 00 57.5 o 069
2008-08-01 21:35:34 C 21 43 28.86 -10 01 01.3 o 069
2008-08-01 21:36:17 C 21 43 28.85 -10 01 02.6 o 069
2008-08-01 21:36:59 C 21 43 28.89 -10 01 05.3 o 069
2008-08-01 21:38:26 C 21 43 28.87 -10 01 10.2 o 069
2008-08-01 21:39:10 C 21 43 28.86 -10 01 12.0 o 069
2008-08-01 21:39:52 C 21 43 28.89 -10 01 15.0 o 069
2008-08-01 21:40:34 C 21 43 28.88 -10 01 17.3 o 069
2008-08-01 21:41:17 C 21 43 28.89 -10 01 19.5 o 069
2008-08-01 21:41:59 C 21 43 28.88 -10 01 21.7 o 069
2008-08-01 21:42:41 C 21 43 28.88 -10 01 23.5 o 069
2008-08-01 21:43:24 C 21 43 28.87 -10 01 26.0 o 069
2008-08-01 21:44:07 C 21 43 28.90 -10 01 28.7 o 069
2008-08-01 21:45:31 C 21 43 28.86 -10 01 32.9 o 069
2008-08-01 21:46:14 C 21 43 28.86 -10 01 35.4 o 069
2008-08-01 21:46:55 C 21 43 28.87 -10 01 37.8 o 069
2008-08-01 21:47:38 C 21 43 28.85 -10 01 40.5 o 069
2008-08-01 21:48:21 C 21 43 28.89 -10 01 42.8 o 069
2008-08-01 21:49:03 C 21 43 28.89 -10 01 44.9 o 069
2008-08-01 21:49:45 C 21 43 28.89 -10 01 47.5 o 069
2008-08-01 21:50:29 C 21 43 28.89 -10 01 49.7 o 069