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
2024-01-27 22:04:28 B 07 14 14.203 +27 11 24.79 V L65
2024-01-28 10:21:18 C 07 13 13.567 +27 21 44.60 V T05
2024-01-28 10:25:52 C 07 13 13.152 +27 21 48.17 V T05
2024-01-28 10:33:42 C 07 13 12.466 +27 21 54.61 V T05
2024-01-28 10:51:31 C 07 13 10.886 +27 22 09.12 V T05
2024-01-28 10:55:58 C 07 13 10.483 +27 22 12.50 X F52
2024-01-28 11:12:51 C 07 13 08.996 +27 22 26.05 X F52
2024-01-28 11:29:39 C 07 13 07.520 +27 22 39.50 X F52
2024-01-28 11:46:26 C 07 13 06.045 +27 22 52.92 X F52
2024-01-28 21:39:42 B 07 12 18.778 +27 30 52.85 V L65
2024-01-28 21:43:50 B 07 12 18.353 +27 30 55.51 V L65
2024-01-28 21:47:57 B 07 12 17.986 +27 30 58.72 V L65
2024-01-29 00:12:17 C 07 12 05.39 +27 33 00.7 X L63
2024-01-29 00:30:55 C 07 12 03.75 +27 33 15.6 X L63
2024-01-29 00:49:44 C 07 12 02.14 +27 33 31.0 X L63
2024-01-29 07:34:47 C 07 11 29.263 +27 39 13.07 V 703
2024-01-29 07:38:07 C 07 11 28.936 +27 39 15.01 V 703
2024-01-29 07:41:28 C 07 11 28.712 +27 39 17.71 V 703
2024-01-29 07:44:48 C 07 11 28.356 +27 39 20.38 V 703
2024-01-29 10:11:38 C 07 11 16.502 +27 41 27.78 V T05
2024-01-29 10:16:56 C 07 11 16.037 +27 41 32.21 V T05
2024-01-29 10:24:24 C 07 11 15.379 +27 41 38.08 V T05
2024-01-29 10:41:16 C 07 11 13.853 +27 41 51.79 V T05
2024-01-29 19:23:03 C 07 10 32.36 +27 48 52.8 X G02
2024-01-29 19:29:32 C 07 10 31.82 +27 48 58.1 X G02
2024-01-29 19:35:37 C 07 10 31.29 +27 49 04.0 X G02
2024-01-30 06:52:55 C 07 09 34.747 +27 58 33.60 V 703
2024-01-30 06:56:15 C 07 09 34.463 +27 58 36.62 V 703
2024-01-30 06:59:34 C 07 09 34.182 +27 58 39.50 V 703
2024-01-30 07:02:53 C 07 09 33.883 +27 58 42.20 V 703
2024-01-30 09:06:47 C 07 09 24.074 +28 00 31.14 V T08
2024-01-30 09:10:47 C 07 09 23.700 +28 00 34.42 V T08
2024-01-30 10:00:55 C 07 09 19.219 +28 01 15.74 V T08
2024-01-30 10:42:27 C 07 09 15.487 +28 01 49.55 V T08
2024-01-30 18:33:21 C 07 08 38.02 +28 08 12.6 o C41
2024-01-30 18:40:08 C 07 08 37.40 +28 08 18.9 o C41
2024-01-31 09:27:24 C 07 07 23.878 +28 20 48.55 V T08
2024-01-31 09:33:23 C 07 07 23.354 +28 20 53.38 V T08
2024-01-31 09:50:54 C 07 07 21.775 +28 21 07.81 V T08
2024-01-31 09:58:59 C 07 07 21.041 +28 21 14.54 V T08
2024-02-01 02:01:13 C 07 06 03.55 +28 34 29.9 u V92
2024-02-01 02:04:05 C 07 06 03.32 +28 34 32.8 u V92
2024-02-01 02:07:02 C 07 06 02.99 +28 34 35.1 u V92
2024-02-01 06:52:26 C 07 05 39.564 +28 38 40.67 X F52
2024-02-01 07:10:05 C 07 05 37.995 +28 38 55.61 X F52
2024-02-01 07:27:45 C 07 05 36.418 +28 39 10.76 X F52
2024-02-01 07:45:23 C 07 05 34.843 +28 39 25.74 X F52
2024-02-01 09:12:35 C 07 05 27.019 +28 40 39.14 V T05
2024-02-01 09:21:55 C 07 05 26.196 +28 40 46.78 V T05
2024-02-01 09:26:28 C 07 05 25.776 +28 40 50.38 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)