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
2023-03-01 10:56:00 C 15 05 30.988 +20 45 25.52 V 703
2023-03-01 11:11:24 C 15 05 29.368 +20 45 52.09 V 703
2023-03-12 03:06:54 C 14 38 15.17 +27 08 17.5 X C95
2023-03-12 03:39:45 C 14 38 11.19 +27 08 57.5 X C95
2023-03-12 04:12:00 C 14 38 07.37 +27 09 39.8 X C95
2023-04-01 05:26:58 C 13 39 44.075 +33 19 03.83 V G96
2023-04-01 05:34:24 C 13 39 43.193 +33 19 06.24 V G96
2023-04-01 05:41:50 C 13 39 42.343 +33 19 08.29 V G96
2023-04-01 05:49:15 C 13 39 41.526 +33 19 10.88 V G96
2023-04-11 07:24:40 C 13 14 46.583 +33 36 54.72 V G96
2023-04-11 07:32:16 C 13 14 45.841 +33 36 53.82 V G96
2023-04-11 07:39:43 C 13 14 45.154 +33 36 53.46 V G96
2023-04-11 07:47:09 C 13 14 44.452 +33 36 52.42 V G96
2023-04-25 06:13:31 C 12 50 42.068 +32 02 42.86 V G96
2023-04-25 06:20:55 C 12 50 41.604 +32 02 39.77 V G96
2023-04-25 06:28:22 C 12 50 41.226 +32 02 35.95 V G96
2023-04-25 06:35:47 C 12 50 40.830 +32 02 33.29 V G96
2024-07-06 05:00:37 C 17 45 41.71 -00 32 07.6 V H21
2024-07-06 05:13:06 C 17 45 40.72 -00 32 10.8 V H21
2024-07-06 05:25:35 C 17 45 39.70 -00 32 14.5 V H21
2024-07-13 03:56:50 C 17 32 38.08 -01 27 47.3 V H21
2024-07-13 04:00:59 C 17 32 37.75 -01 27 49.0 V H21
2025-02-14 14:04:40 C 16 07 20.309 +13 39 58.86 V T08
2025-02-14 14:08:41 C 16 07 19.522 +13 40 14.41 V T08
2025-02-14 14:19:24 C 16 07 17.323 +13 40 53.22 V T08
2025-02-14 14:34:46 C 16 07 14.119 +13 41 49.60 V T08
2025-02-16 12:31:14 C 15 58 08.692 +16 23 53.05 V 703
2025-02-16 12:37:47 C 15 58 07.331 +16 24 17.03 V 703
2025-02-16 12:41:03 C 15 58 06.719 +16 24 27.68 V 703
2025-02-16 14:07:01 C 15 57 50.661 +16 29 26.79 X F52
2025-02-16 14:19:52 C 15 57 48.065 +16 30 10.43 X F52
2025-02-16 14:32:44 C 15 57 45.470 +16 30 54.23 X F52
2025-02-16 14:45:43 C 15 57 42.819 +16 31 38.97 X F52
2025-02-18 14:06:05 C 15 48 29.441 +19 08 06.47 V T08
2025-02-18 14:16:56 C 15 48 27.192 +19 08 41.64 V T08
2025-02-18 14:21:34 C 15 48 26.287 +19 08 57.30 V T08
2025-02-18 14:37:40 C 15 48 23.038 +19 09 48.60 V T08
2025-02-19 13:46:13 C 15 43 54.694 +20 22 26.18 V T05
2025-02-19 13:50:09 C 15 43 53.947 +20 22 38.17 V T05
2025-02-19 13:54:45 C 15 43 52.982 +20 22 52.36 V T05
2025-02-19 14:09:26 C 15 43 50.071 +20 23 37.93 V T05
2025-02-20 09:49:43 C 15 40 02.662 +21 23 18.10 V 703
2025-02-20 09:55:58 C 15 40 01.369 +21 23 36.24 V 703
2025-02-20 09:59:05 C 15 40 00.772 +21 23 45.78 V 703
2025-02-20 14:03:12 C 15 39 13.507 +21 36 00.40 V T05
2025-02-20 14:08:24 C 15 39 12.401 +21 36 16.20 V T05
2025-02-20 14:09:03 C 15 39 12.286 +21 36 17.71 V T05
2025-02-20 14:11:40 C 15 39 11.762 +21 36 25.56 V T05
2025-02-20 14:15:37 C 15 39 10.987 +21 36 37.37 V T05
2025-02-20 14:16:16 C 15 39 10.865 +21 36 39.31 V T05