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
2024-02-01 19:55:18 B 07 04 35.107 +28 49 21.97 V L65
2024-02-01 19:59:57 B 07 04 34.709 +28 49 25.86 V L65
2024-02-01 20:04:37 B 07 04 34.315 +28 49 30.11 V L65
2024-02-02 00:58:40 C 07 04 11.05 +28 53 41.0 u V92
2024-02-02 01:03:17 C 07 04 10.63 +28 53 44.5 u V92
2024-02-02 01:05:38 C 07 04 10.42 +28 53 46.5 u V92
2024-02-03 04:51:24 B 07 01 52.94 +29 17 07.3 X W42
2024-02-03 04:59:27 B 07 01 52.23 +29 17 14.2 X W42
2024-02-03 05:07:31 B 07 01 51.51 +29 17 20.9 X W42
2024-02-03 09:27:52 C 07 01 30.665 +29 21 02.92 V T08
2024-02-03 09:31:52 C 07 01 30.317 +29 21 06.55 V T08
2024-02-03 09:39:19 C 07 01 29.647 +29 21 12.35 V T08
2024-02-03 10:01:07 C 07 01 27.710 +29 21 30.42 V T08
2024-02-04 07:13:52 C 06 59 44.945 +29 39 10.12 V 703
2024-02-04 07:17:13 C 06 59 44.624 +29 39 12.78 V 703
2024-02-04 07:20:33 C 06 59 44.336 +29 39 15.37 V 703
2024-02-04 07:23:54 C 06 59 44.027 +29 39 17.78 V 703
2024-02-04 09:04:13 C 06 59 36.482 +29 40 48.83 V T08
2024-02-04 09:09:33 C 06 59 36.017 +29 40 53.40 V T08
2024-02-04 09:21:48 C 06 59 34.927 +29 41 03.59 V T08
2024-02-05 04:47:10 C 06 58 02.438 +29 57 12.96 V 703
2024-02-05 04:50:36 C 06 58 02.132 +29 57 15.91 V 703
2024-02-05 04:54:05 C 06 58 01.819 +29 57 18.32 V 703
2024-02-05 04:57:26 C 06 58 01.535 +29 57 21.24 V 703
2024-02-05 08:52:27 C 06 57 42.434 +30 00 42.84 V T05
2024-02-05 09:02:40 C 06 57 41.539 +30 00 51.26 V T05
2024-02-05 09:07:13 C 06 57 41.155 +30 00 55.04 V T05
2024-02-05 09:23:40 C 06 57 39.722 +30 01 08.29 V T05
2024-02-06 08:19:43 C 06 55 51.598 +30 20 17.48 V T05
2024-02-06 08:39:36 C 06 55 49.870 +30 20 34.04 V T05
2024-02-06 08:53:31 C 06 55 48.658 +30 20 45.60 V T05
2024-02-06 08:58:04 C 06 55 48.259 +30 20 49.06 V T05
2024-02-07 20:26:55 B 06 53 04.025 +30 50 05.71 V L65
2024-02-07 20:31:33 B 06 53 03.641 +30 50 10.03 V L65
2024-02-07 20:36:12 B 06 53 03.286 +30 50 13.81 V L65
2024-02-09 08:41:12 C 06 50 19.886 +31 20 20.26 V T05
2024-02-09 08:46:26 C 06 50 19.430 +31 20 24.32 V T05
2024-02-09 09:10:28 C 06 50 17.484 +31 20 44.20 V T05
2024-02-10 09:02:28 C 06 48 32.858 +31 40 23.12 V T05
2024-02-10 09:07:01 C 06 48 32.491 +31 40 26.58 V T05
2024-02-10 09:15:07 C 06 48 31.848 +31 40 33.56 V T05
2024-02-10 09:30:56 C 06 48 30.581 +31 40 45.91 V T05
2024-02-13 07:45:14 C 06 43 40.200 +32 38 05.14 V T05
2024-02-13 08:01:31 C 06 43 38.976 +32 38 18.49 V T05
2024-02-13 08:06:05 C 06 43 38.650 +32 38 22.06 V T05
2024-02-13 08:13:54 C 06 43 38.062 +32 38 28.03 V T05
2024-02-13 17:47:28 C 06 43 01.954 +32 45 58.90 X M26
2024-02-13 17:51:57 C 06 43 01.649 +32 46 02.57 X M26
2024-02-13 17:56:25 C 06 43 01.279 +32 46 06.53 X M26
2024-02-14 00:47:30 C 06 42 34.61 +32 51 43.4 V W46
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)