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
2008-07-25 08:46:39 C 21 41 38.11 -03 41 12.7 r 703
2008-07-25 08:52:37 C 21 41 38.11 -03 41 21.7 r 703
2008-07-25 09:04:35 C 21 41 38.14 -03 41 36.6 r 703
2008-07-29 23:20:22 C 21 42 48.78 -06 50 56.9 o 069
2008-07-30 00:04:03 C 21 42 48.93 -06 52 25.7 o 069
2008-07-30 22:10:43 C 21 43 02.14 -07 45 00.2 o 069
2008-07-30 22:14:43 C 21 43 02.27 -07 45 07.3 o 069
2008-07-30 22:18:42 C 21 43 02.39 -07 45 14.1 o 069
2008-07-30 22:41:07 C 21 43 02.33 -07 46 15.0 o 069
2008-07-30 22:45:07 C 21 43 02.39 -07 46 23.6 o 069
2008-07-30 22:49:06 C 21 43 02.51 -07 46 31.4 o 069
2008-07-30 23:42:23 C 21 43 02.44 -07 48 52.3 o 069
2008-07-30 23:46:22 C 21 43 02.55 -07 48 59.2 o 069
2008-07-30 23:50:22 C 21 43 02.68 -07 49 06.3 o 069
2008-07-31 06:37:25 C 21 43 07.54 -08 06 28.6 16.7 c 704
2008-07-31 06:53:50 C 21 43 07.53 -08 07 11.8 17.0 c 704
2008-07-31 07:09:58 C 21 43 07.51 -08 07 54.6 17.0 c 704
2008-07-31 07:26:05 C 21 43 07.49 -08 08 37.3 17.1 c 704
2008-07-31 07:42:16 C 21 43 07.46 -08 09 20.2 17.0 c 704
2008-07-31 15:51:28 C 21 43 11.78 -08 31 23.9 r 900
2008-07-31 16:02:53 C 21 43 11.76 -08 31 55.7 r 900
2008-07-31 22:30:40 C 21 43 15.76 -08 50 17.7 o 069
2008-07-31 22:31:54 C 21 43 15.78 -08 50 21.2 o 069
2008-07-31 22:33:05 C 21 43 15.75 -08 50 24.5 o 069
2008-07-31 22:36:08 C 21 43 15.74 -08 50 33.7 o 069
2008-07-31 22:36:52 C 21 43 15.77 -08 50 35.7 o 069
2008-07-31 22:37:33 C 21 43 15.80 -08 50 37.0 o 069
2008-07-31 23:02:04 C 21 43 16.44 -08 51 43.8 v 204
2008-07-31 23:03:39 C 21 43 15.82 -08 51 53.0 r 069
2008-07-31 23:04:50 C 21 43 15.82 -08 51 56.1 r 069
2008-07-31 23:05:01 C 21 43 16.45 -08 51 52.3 v 204
2008-07-31 23:06:04 C 21 43 15.87 -08 51 59.4 r 069
2008-07-31 23:08:19 C 21 43 16.45 -08 52 01.7 v 204
2008-07-31 23:08:46 C 21 43 15.83 -08 52 07.8 o 069
2008-07-31 23:09:33 C 21 43 15.85 -08 52 10.1 o 069
2008-07-31 23:09:55 C 21 43 15.85 -08 52 11.5 o 069
2008-07-31 23:10:18 C 21 43 15.81 -08 52 11.7 o 069
2008-07-31 23:11:19 C 21 43 16.45 -08 52 10.3 v 204
2008-07-31 23:12:27 C 21 43 16.77 -08 52 11.5 r A06
2008-07-31 23:14:19 C 21 43 16.45 -08 52 19.0 16.3 v 204
2008-07-31 23:30:54 C 21 43 16.74 -08 53 04.9 r A06
2008-07-31 23:39:08 C 21 43 15.89 -08 53 34.9 o 069
2008-07-31 23:40:19 C 21 43 15.92 -08 53 38.3 o 069
2008-07-31 23:41:33 C 21 43 15.88 -08 53 42.1 o 069
2008-07-31 23:42:44 C 21 43 15.89 -08 53 45.2 o 069
2008-07-31 23:43:26 C 21 43 15.89 -08 53 47.5 o 069
2008-07-31 23:44:07 C 21 43 15.94 -08 53 49.1 o 069
2008-07-31 23:54:47 C 21 43 16.74 -08 54 13.8 r A06
2008-08-01 02:18:35 C 21 43 16.77 -09 01 10.5 r J75
2008-08-01 02:38:22 C 21 43 16.76 -09 02 08.4 r J75