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 23:22:14 C 21 45 00.59 -23 12 19.8 o 152
2008-08-07 23:23:15 C 21 45 00.56 -23 12 28.7 o 152
2008-08-07 23:24:14 C 21 45 00.58 -23 12 37.7 o 152
2008-08-07 23:25:15 C 21 45 00.60 -23 12 45.8 o 152
2008-08-07 23:33:51 C 21 45 00.77 -23 14 04.1 o 152
2008-08-07 23:35:08 C 21 45 00.72 -23 14 14.8 o 152
2008-08-07 23:41:46 C 21 45 00.72 -23 15 14.1 o 152
2008-08-07 23:43:03 C 21 45 00.69 -23 15 24.0 o 152
2008-08-08 00:04:38 C 21 45 01.45 -23 18 30.7 r B38
2008-08-08 00:06:20 C 21 45 01.46 -23 18 45.8 r B38
2008-08-08 00:08:25 C 21 45 01.44 -23 19 03.5 r B38
2008-08-08 04:03:05 C 21 45 08.15 -23 53 53.5 r H53
2008-08-08 04:04:14 C 21 45 08.12 -23 54 03.7 r H53
2008-08-08 04:05:26 C 21 45 08.14 -23 54 14.9 r H53
2008-08-08 04:06:35 C 21 45 08.13 -23 54 25.9 r H53
2008-08-08 04:08:05 C 21 45 08.12 -23 54 38.7 r H53
2008-08-08 04:09:23 C 21 45 08.12 -23 54 51.0 r H53
2008-08-09 04:26:11 C 21 45 32.82 -27 58 45.8 r H53
2008-08-09 04:27:28 C 21 45 32.88 -27 59 00.5 r H53
2008-08-09 04:29:23 C 21 45 32.81 -27 59 21.5 r H53
2008-08-09 04:30:57 C 21 45 32.80 -27 59 39.0 r H53
2008-08-09 04:32:38 C 21 45 32.79 -27 59 58.1 r H53
2008-08-09 04:33:53 C 21 45 32.81 -28 00 12.2 r H53
2008-08-09 05:43:49 C 21 45 30.82 -28 11 45.5 r 808
2008-08-09 05:53:59 C 21 45 30.77 -28 13 41.0 r 808
2008-08-09 06:02:30 C 21 45 30.64 -28 15 17.6 r 808
2008-08-10 04:55:38 C 21 46 04.55 -33 00 01.0 r H53
2008-08-10 04:56:52 C 21 46 04.55 -33 00 19.1 r H53
2008-08-10 04:58:03 C 21 46 04.58 -33 00 34.6 r H53
2008-08-10 04:59:14 C 21 46 04.56 -33 00 50.3 r H53
2008-08-10 05:00:22 C 21 46 04.52 -33 01 06.2 r H53
2008-08-10 05:01:39 C 21 46 04.54 -33 01 23.7 r H53
2008-08-10 05:30:00 C 21 46 02.38 -33 06 21.3 r 808
2008-08-10 05:35:59 C 21 46 02.34 -33 07 42.7 r 808
2008-08-10 05:38:15 C 21 46 02.34 -33 08 14.9 r 808
2008-08-10 05:45:44 C 21 46 02.35 -33 09 58.9 r 808
2008-08-10 05:57:45 C 21 46 02.27 -33 12 41.6 r 808
2008-08-12 16:34:32 C 21 48 22.44 -50 31 31.8 o 474
2008-08-12 16:36:58 C 21 48 22.54 -50 32 25.1 o 474
2008-08-12 16:40:36 C 21 48 22.69 -50 33 47.5 o 474
2008-08-12 16:52:27 C 21 48 23.22 -50 38 06.2 o 474
2008-08-12 16:59:47 C 21 48 23.60 -50 40 47.7 o 474
2008-08-12 17:16:12 C 21 48 24.40 -50 46 48.8 o 474
2009-03-19 08:58:05 C 15 46 11.97 +10 08 33.0 o 291
2009-03-19 09:08:22 C 15 46 11.63 +10 08 41.1 o 291
2009-03-19 09:18:38 C 15 46 11.31 +10 08 48.5 o 291
2009-05-20 03:18:11 C 14 18 37.44 +18 40 11.2 o H55
2009-05-20 03:55:51 C 14 18 35.44 +18 40 04.9 o H55
2009-05-20 04:33:30 C 14 18 33.59 +18 39 58.4 o H55
2010-07-08 22:54:17 C 20 39 50.98 -00 47 57.4 u B67