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
2015-04-12 07:36:03 C 14 41 06.46 +21 34 40.9 u H21
2017-03-29 03:28:30 C 14 52 01.32 +20 50 48.1 20.7 q J43
2017-03-29 03:40:37 C 14 52 00.35 +20 50 56.8 21.4 q J43
2017-03-29 03:52:45 C 14 51 59.37 +20 51 05.9 20.3 q J43
2017-03-29 04:04:52 C 14 51 58.47 +20 51 14.3 20.8 q J43
2017-04-03 10:30:13 C 14 41 44.47 +22 17 18.4 q G96
2017-04-03 10:36:21 C 14 41 43.90 +22 17 21.7 q G96
2017-04-03 10:48:38 C 14 41 42.85 +22 17 29.7 q G96
2017-04-07 08:49:04 C 14 33 45.70 +23 10 40.3 q G96
2017-04-07 09:04:03 C 14 33 44.37 +23 10 48.0 q G96
2017-04-07 09:10:06 C 14 33 43.78 +23 10 51.4 q G96
2017-04-07 09:16:17 C 14 33 43.34 +23 10 54.5 q G96
2019-01-09 15:11:01 C 14 56 40.337 -08 18 00.51 U F51
2019-01-09 15:25:50 C 14 56 41.061 -08 17 44.65 U F51
2019-01-09 15:33:17 C 14 56 41.425 -08 17 36.82 U F51
2019-02-12 12:31:14 C 15 24 41.96 +05 18 19.0 V G96
2019-02-12 12:38:37 C 15 24 42.02 +05 18 27.5 V G96
2019-02-12 12:46:00 C 15 24 42.08 +05 18 34.7 V G96
2019-02-12 12:53:22 C 15 24 42.07 +05 18 42.9 V G96
2019-03-09 11:25:01 C 15 11 34.87 +16 22 52.5 V G96
2019-03-09 11:32:33 C 15 11 34.40 +16 23 01.5 V G96
2019-03-09 11:40:05 C 15 11 33.99 +16 23 09.6 V G96
2019-03-09 11:47:38 C 15 11 33.57 +16 23 17.9 V G96
2019-04-01 17:52:15 C 14 28 57.62 +24 51 38.8 q D29
2019-04-01 18:12:36 C 14 28 55.66 +24 51 51.8 q D29
2019-04-01 18:32:58 C 14 28 53.70 +24 52 03.9 q D29
2021-02-07 12:49:37 C 15 26 41.73 +03 52 11.6 V G96
2021-02-07 12:55:47 C 15 26 41.68 +03 52 20.3 V G96
2021-02-07 13:04:36 C 15 26 41.62 +03 52 33.0 V G96
2021-02-07 13:10:47 C 15 26 41.56 +03 52 41.7 V G96
2021-04-01 08:21:34 C 14 06 15.53 +28 47 38.6 V G96
2021-04-01 08:29:17 C 14 06 14.71 +28 47 42.6 V G96
2021-04-01 08:36:56 C 14 06 13.93 +28 47 46.1 V G96
2021-04-01 08:44:38 C 14 06 13.10 +28 47 50.3 V G96
2021-04-17 06:53:24 C 13 29 50.99 +30 06 29.4 V G96
2021-04-17 07:01:47 C 13 29 50.28 +30 06 29.0 V G96
2021-04-17 07:10:10 C 13 29 49.54 +30 06 28.8 V G96
2021-04-17 07:18:35 C 13 29 48.83 +30 06 27.8 V G96
2021-05-05 06:57:20 C 13 03 04.17 +28 16 15.4 V G96
2021-05-05 07:05:26 C 13 03 03.83 +28 16 12.5 V G96
2021-05-05 07:13:31 C 13 03 03.45 +28 16 09.3 V G96
2021-05-05 07:21:38 C 13 03 03.10 +28 16 06.2 V G96
2022-08-19 06:27:28 C 16 56 19.490 -09 48 40.02 U F51
2022-08-19 06:46:24 C 16 56 19.015 -09 48 51.79 U F51
2022-08-19 07:05:29 C 16 56 18.557 -09 49 03.69 U F51
2022-08-19 07:24:29 C 16 56 18.106 -09 49 15.53 U F51
2023-02-01 12:40:46 C 15 50 36.431 -02 02 16.58 V 703
2023-02-01 12:56:07 C 15 50 35.480 -02 01 40.91 V 703
2023-02-01 13:03:47 C 15 50 35.070 -02 01 21.61 V 703
2023-03-01 10:48:20 C 15 05 31.744 +20 45 12.89 V 703