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
2025-02-20 14:36:30 C 15 39 06.802 +21 37 40.33 V T05
2025-02-21 11:45:08 C 15 35 02.458 +22 39 20.84 V 703
2025-02-21 11:46:36 C 15 35 02.134 +22 39 26.35 V 703
2025-02-21 11:48:24 C 15 35 01.759 +22 39 29.56 V 703
2025-02-21 11:49:53 C 15 35 01.511 +22 39 34.85 V 703
2025-02-21 11:51:41 C 15 35 01.126 +22 39 39.82 V 703
2025-02-21 11:53:10 C 15 35 00.812 +22 39 43.49 V 703
2025-02-21 11:54:59 C 15 35 00.463 +22 39 49.25 V 703
2025-02-21 11:56:28 C 15 35 00.208 +22 39 53.10 V 703
2025-02-21 13:44:19 C 15 34 40.104 +22 45 08.75 V T08
2025-02-21 13:55:07 C 15 34 37.922 +22 45 39.31 V T08
2025-02-21 13:57:44 C 15 34 37.411 +22 45 46.51 V T08
2025-02-21 14:05:03 C 15 34 35.957 +22 46 08.08 V T08
2025-02-22 11:19:34 C 15 30 32.098 +23 45 47.74 V T08
2025-02-22 11:26:58 C 15 30 30.586 +23 46 08.83 V T08
2025-02-22 11:35:27 C 15 30 28.920 +23 46 32.09 V T05
2025-02-22 11:38:48 C 15 30 28.279 +23 46 41.66 V T08
2025-02-23 11:18:40 C 15 25 54.602 +24 50 46.97 V 703
2025-02-23 11:21:56 C 15 25 53.980 +24 50 54.53 V 703
2025-02-23 11:25:11 C 15 25 53.299 +24 51 03.20 V 703
2025-02-23 11:28:27 C 15 25 52.716 +24 51 12.20 V 703
2025-02-23 13:31:33 C 15 25 29.578 +24 56 42.83 V T05
2025-02-23 13:34:10 C 15 25 29.083 +24 56 49.81 V T05
2025-02-23 13:38:44 C 15 25 28.174 +24 57 01.91 V T05
2025-02-23 13:47:09 C 15 25 26.494 +24 57 24.41 V T05
2025-02-23 14:00:35 C 15 25 23.780 +24 58 00.35 X F52
2025-02-23 14:18:19 C 15 25 20.234 +24 58 47.56 X F52
2025-02-23 14:36:03 C 15 25 16.690 +24 59 34.57 X F52
2025-02-24 10:50:40 C 15 21 25.066 +25 51 56.48 V T05
2025-02-24 10:57:33 C 15 21 23.731 +25 52 14.59 V T05
2025-02-24 11:11:29 C 15 21 21.000 +25 52 50.92 V T05
2025-02-24 12:36:34 C 15 21 04.282 +25 56 30.16 V T05
2025-02-25 13:43:43 C 15 16 14.722 +26 58 52.82 V T08
2025-02-25 13:46:26 C 15 16 14.194 +26 58 59.59 V T08
2025-02-25 13:51:42 C 15 16 13.140 +26 59 13.67 V T08
2025-02-25 14:28:35 C 15 16 05.767 +27 00 42.73 V T08
2025-02-26 11:02:47 C 15 12 09.256 +27 49 26.94 V G96
2025-02-26 11:10:16 C 15 12 07.776 +27 49 44.51 V G96
2025-02-26 11:17:46 C 15 12 06.275 +27 50 02.26 V G96
2025-02-26 11:25:15 C 15 12 04.792 +27 50 19.64 V G96
2025-02-26 12:34:46 C 15 11 50.896 +27 53 01.39 V 703
2025-02-26 12:38:02 C 15 11 50.284 +27 53 08.77 V 703
2025-02-26 12:41:18 C 15 11 49.592 +27 53 16.55 V 703
2025-02-26 12:44:33 C 15 11 49.006 +27 53 24.07 V 703
2025-02-26 13:13:00 C 15 11 44.738 +27 54 34.92 V T08
2025-02-26 13:16:18 C 15 11 44.028 +27 54 42.59 V T08
2025-02-26 13:48:51 C 15 11 37.558 +27 55 58.48 V T08
2025-02-26 13:53:34 C 15 11 36.650 +27 56 09.13 V T08
2025-02-27 11:12:22 C 15 07 31.300 +28 44 23.82 V 703
2025-02-27 11:15:41 C 15 07 30.659 +28 44 31.60 V 703