381677 (2009 BJ81)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4559023253 ± 1.80e-09
Semi-major axis (a)1.8508835724 AU ± 3.40e-10
Inclination (i)5.84137620° ± 2.95e-07
Long. of Asc. Node (Ω)108.46981986° ± 3.28e-06
Arg. of Perihelion (ω)90.65455555° ± 3.58e-06
Mean Anomaly (M)227.94640423° ± 3.89e-07
Mean Motion (n)0.3914205519°/day ± 1.08e-10
Perihelion dist (q)1.00706145 AU ± 3.33e-09
Aphelion dist (Q)2.69470570 AU ± 3.36e-09
Orbital Period2.51807494 yr ± 6.94e-10
Physical Parameters
H (abs. magnitude)18.36
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.163″
Uncertainty0
Orbit TypeApollo
MOID0.098181 AU
Observations Used1684
Radar Obs Used3
Oppositions10
Arc Total2008-2024
First Observation Used2008-10-30
Last Observation Used2025-11-24
Observations (1949)
Date Type RA Dec Mag Band Observatory
2023-12-13 10:22:33 C 07 59 29.018 +17 53 01.56 X F52
2023-12-13 10:41:13 C 07 59 29.070 +17 53 04.64 X F52
2023-12-13 10:59:52 C 07 59 29.114 +17 53 07.82 X F52
2023-12-13 11:18:31 C 07 59 29.159 +17 53 10.79 X F52
2023-12-15 10:23:58 C 07 59 39.737 +18 01 07.90 X F52
2023-12-15 10:40:54 C 07 59 39.720 +18 01 11.20 X F52
2023-12-15 10:57:49 C 07 59 39.701 +18 01 14.27 X F52
2023-12-22 17:43:54 C 07 58 47.04 +18 41 51.7 V O18
2023-12-22 17:44:41 C 07 58 47.03 +18 41 52.0 V O18
2023-12-22 17:50:06 C 07 58 46.95 +18 41 53.3 V O18
2023-12-22 17:59:21 C 07 58 46.81 +18 41 56.0 V O18
2023-12-22 18:09:07 C 07 58 46.66 +18 41 58.9 V O18
2023-12-22 18:18:55 C 07 58 46.51 +18 42 01.8 V O18
2023-12-25 21:42:57 C 07 57 36.361 +19 05 35.43 W M01
2023-12-26 00:08:31 C 07 57 32.984 +19 06 25.28 W M01
2023-12-26 02:48:33 C 07 57 29.331 +19 07 18.72 W M01
2023-12-31 10:11:37 C 07 54 17.340 +19 56 39.01 V T08
2023-12-31 10:17:10 C 07 54 17.141 +19 56 41.53 V T08
2023-12-31 10:21:10 C 07 54 17.016 +19 56 42.83 V T08
2023-12-31 10:29:48 C 07 54 16.723 +19 56 46.28 V T08
2024-01-01 11:43:02 C 07 53 27.058 +20 07 56.57 V T05
2024-01-01 11:47:12 C 07 53 26.902 +20 07 59.27 V T05
2024-01-01 12:33:52 C 07 53 25.075 +20 08 19.57 V T05
2024-01-01 12:42:21 C 07 53 24.782 +20 08 23.32 V T05
2024-01-02 11:39:24 C 07 52 36.715 +20 18 59.83 V T08
2024-01-02 12:29:08 C 07 52 34.752 +20 19 23.41 V T08
2024-01-02 12:37:42 C 07 52 34.411 +20 19 27.16 V T08
2024-01-02 12:42:21 C 07 52 34.219 +20 19 29.28 V T08
2024-01-04 10:09:44 C 07 50 49.925 +20 41 41.57 V T05
2024-01-04 10:14:17 C 07 50 49.733 +20 41 43.98 V T05
2024-01-04 10:18:35 C 07 50 49.531 +20 41 46.90 V T05
2024-01-04 10:26:24 C 07 50 49.162 +20 41 50.06 V T05
2024-01-05 12:25:52 C 07 49 42.967 +20 55 14.48 V T05
2024-01-05 12:31:18 C 07 49 42.691 +20 55 17.22 V T05
2024-01-05 12:39:46 C 07 49 42.283 +20 55 21.54 V T05
2024-01-05 12:56:02 C 07 49 41.496 +20 55 30.25 V T05
2024-01-06 12:01:53 C 07 48 39.984 +21 07 52.28 V T08
2024-01-06 12:06:32 C 07 48 39.746 +21 07 54.73 V T08
2024-01-06 12:14:10 C 07 48 39.379 +21 07 59.09 V T08
2024-01-06 13:03:36 C 07 48 36.864 +21 08 25.33 V T08
2024-01-07 10:16:23 C 07 47 38.100 +21 20 09.02 V T08
2024-01-07 10:19:03 C 07 47 37.958 +21 20 10.57 V T08
2024-01-07 10:23:15 C 07 47 37.728 +21 20 12.66 V T08
2024-01-07 10:57:42 C 07 47 35.899 +21 20 32.35 V T08
2024-01-07 16:19:32 C 07 47 20.87 +21 23 26.8 V O18
2024-01-07 16:28:44 C 07 47 20.38 +21 23 32.2 V O18
2024-01-07 16:37:58 C 07 47 19.91 +21 23 37.3 V O18
2024-01-08 10:57:22 C 07 46 25.159 +21 34 12.61 V T05
2024-01-08 11:02:07 C 07 46 24.898 +21 34 15.28 V T05
2024-01-08 11:12:10 C 07 46 24.346 +21 34 20.96 V T05
Radar Observations (3)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2024-05-14 01:20:00 90229.5 0.1 Hz 8560 -14 -14
2024-05-14 02:30:00 122376775.9 11 us 8560 -14 -14
2024-05-18 00:40:00 120904971 1 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)