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
2010-07-08 23:08:32 C 20 39 50.29 -00 48 01.5 u B67
2010-07-08 23:22:43 C 20 39 49.61 -00 48 05.8 u B67
2010-07-15 23:59:33 C 20 30 04.09 -02 01 21.9 r 157
2010-07-16 00:06:26 C 20 30 03.54 -02 01 26.1 r 157
2010-07-16 00:12:32 C 20 30 03.11 -02 01 29.7 r 157
2010-07-18 22:03:22 C 20 24 31.67 -02 47 56.1 v 204
2010-07-18 22:11:52 C 20 24 30.92 -02 48 02.1 v 204
2010-07-18 22:20:23 C 20 24 30.14 -02 48 08.7 v 204
2010-07-19 20:53:01 C 20 22 30.00 -03 05 35.5 u B67
2010-07-19 21:02:57 C 20 22 29.06 -03 05 43.6 u B67
2010-07-19 21:14:03 C 20 22 28.02 -03 05 52.3 u B67
2010-07-23 05:34:47 C 20 14 19.25 -04 19 11.2 o H21
2010-07-23 05:40:03 C 20 14 18.64 -04 19 16.6 o H21
2010-07-23 05:55:52 C 20 14 16.79 -04 19 32.8 o H21
2010-07-23 06:00:58 C 20 14 16.20 -04 19 38.2 o H21
2010-07-31 22:14:58 C 19 44 01.90 -09 13 19.3 u 160
2010-07-31 22:18:48 C 19 44 01.17 -09 13 26.4 u 160
2010-07-31 22:22:51 C 19 44 00.40 -09 13 34.0 u 160
2010-08-05 05:20:04 C 19 22 23.97 -12 50 13.1 18.2 c 704
2010-08-05 05:37:28 C 19 22 19.74 -12 50 54.3 18.5 c 704
2010-08-05 05:55:04 C 19 22 15.32 -12 51 36.6 18.4 c 704
2010-08-05 06:12:50 C 19 22 10.89 -12 52 18.8 18.5 c 704
2010-08-05 06:30:11 C 19 22 06.74 -12 52 59.0 18.5 c 704
2010-08-07 23:04:54 C 19 05 29.01 -15 37 44.2 v 204
2010-08-07 23:15:50 C 19 05 25.91 -15 38 13.9 v 204
2010-08-07 23:23:21 C 19 05 23.74 -15 38 34.3 v 204
2010-08-25 00:13:25 S 16 05 36.667 -36 22 25.10 L C51
2010-08-25 00:13:36 S 16 05 36.554 -36 22 26.18 L C51
2010-08-25 04:59:06 S 16 02 49.298 -36 32 22.92 L C51
2012-07-17 00:09:38 C 19 35 46.02 -03 06 43.4 t 204
2012-07-17 00:37:53 C 19 35 42.79 -03 07 01.6 t 204
2012-09-01 23:20:33 C 16 19 48.45 -28 37 31.3 u 807
2012-09-01 23:24:05 C 16 19 47.72 -28 37 36.3 u 807
2012-09-01 23:27:55 C 16 19 46.93 -28 37 41.8 u 807
2012-09-01 23:31:35 C 16 19 46.18 -28 37 47.1 u 807
2012-09-01 23:35:14 C 16 19 45.42 -28 37 52.6 u 807
2014-08-03 21:06:27 C 18 07 10.50 -09 00 17.9 q 204
2014-08-03 21:27:29 C 18 07 07.75 -09 00 38.7 q 204
2015-02-18 14:03:53 C 15 32 47.998 +05 25 36.65 L F51
2015-02-18 14:21:36 C 15 32 48.174 +05 25 50.04 L F51
2015-02-18 14:39:24 C 15 32 48.353 +05 26 03.27 L F51
2015-02-18 14:57:14 C 15 32 48.516 +05 26 16.65 L F51
2015-03-15 09:25:59 C 15 24 37.15 +13 38 51.3 u H21
2015-03-15 09:41:59 C 15 24 36.44 +13 39 04.8 u H21
2015-03-15 09:58:15 C 15 24 35.74 +13 39 18.8 u H21
2015-03-28 10:48:09 C 15 07 47.02 +17 55 16.5 q G96
2015-03-28 10:59:28 C 15 07 46.23 +17 55 25.5 q G96
2015-03-28 11:10:46 C 15 07 45.49 +17 55 34.1 q G96
2015-03-28 11:22:05 C 15 07 44.70 +17 55 42.3 q G96
2015-04-12 07:19:42 C 14 41 07.76 +21 34 33.2 u H21