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
2024-06-10 22:14:26 C 15 48 34.23 +00 34 09.8 V C40
2024-06-10 22:16:44 C 15 48 36.002 +00 34 01.16 X Z43
2024-06-10 22:18:09 C 15 48 34.63 +00 33 58.9 V C40
2024-06-10 22:21:52 C 15 48 35.04 +00 33 48.1 V C40
2024-06-10 22:25:36 C 15 48 35.46 +00 33 37.2 V C40
2024-06-10 22:29:20 C 15 48 35.86 +00 33 26.4 V C40
2024-06-10 22:30:35 C 15 48 37.500 +00 33 21.06 X Z43
2024-06-10 22:31:27 B 15 48 37.57 +00 33 18.5 q Y84
2024-06-10 22:43:15 B 15 48 38.86 +00 32 44.0 q Y84
2024-06-10 22:45:14 C 15 48 39.101 +00 32 38.26 X Z43
2024-06-10 22:55:08 B 15 48 40.15 +00 32 09.6 q Y84
2024-06-11 10:11:14 C 15 49 58.219 +00 00 01.44 V T05
2024-06-11 10:16:27 C 15 49 58.747 -00 00 13.39 V T05
2024-06-11 10:24:16 C 15 49 59.563 -00 00 35.78 V T05
2024-06-11 10:38:58 C 15 50 01.090 -00 01 17.47 V T05
2024-06-11 20:13:07 C 15 51 08.72 -00 28 37.4 X G02
2024-06-11 20:17:52 C 15 51 09.26 -00 28 50.9 X G02
2024-06-11 20:22:20 C 15 51 09.71 -00 29 03.4 X G02
2024-06-11 21:13:58 C 15 51 15.595 -00 31 28.60 Z C23
2024-06-11 21:15:16 C 15 51 14.52 -00 31 28.9 V C40
2024-06-11 21:18:25 C 15 51 14.85 -00 31 37.6 V C40
2024-06-11 21:21:36 C 15 51 15.18 -00 31 46.7 V C40
2024-06-11 21:24:46 C 15 51 15.52 -00 31 55.5 V C40
2024-06-11 21:27:57 C 15 51 15.85 -00 32 04.4 V C40
2024-06-11 21:31:07 C 15 51 16.18 -00 32 13.2 V C40
2024-06-11 21:34:11 C 15 51 16.51 -00 32 21.9 V C40
2024-06-11 21:37:10 C 15 51 16.81 -00 32 30.1 V C40
2024-06-11 21:40:09 C 15 51 17.13 -00 32 38.5 V C40
2024-06-11 22:08:49 C 15 51 21.358 -00 34 01.45 Z C23
2024-06-12 00:11:32 C 15 51 34.291 -00 39 42.98 Z C23
2024-06-12 08:11:30 C 15 52 29.777 -01 01 28.57 X F51
2024-06-12 08:29:30 C 15 52 31.567 -01 02 17.96 X F51
2024-06-12 09:05:27 C 15 52 35.133 -01 03 56.26 X F51
2024-06-13 09:04:43 C 15 55 12.941 -02 08 08.30 V T08
2024-06-13 09:08:48 C 15 55 13.334 -02 08 18.96 V T08
2024-06-13 09:16:54 C 15 55 14.112 -02 08 40.20 V T08
2024-06-13 09:31:23 C 15 55 15.490 -02 09 18.11 V T08
2024-06-13 20:15:44 C 15 56 25.34 -02 37 25.7 X G02
2024-06-13 20:21:54 C 15 56 25.89 -02 37 41.7 X G02
2024-06-13 20:27:47 C 15 56 26.49 -02 37 56.9 X G02
2024-06-13 20:38:12 C 15 56 27.80 -02 38 20.6 V G17
2024-06-13 20:44:42 C 15 56 28.42 -02 38 37.5 V G17
2024-06-13 20:51:13 C 15 56 29.04 -02 38 54.3 V G17
2024-06-13 20:57:43 C 15 56 29.68 -02 39 10.8 V G17
2024-06-13 20:58:18 C 15 56 29.62 -02 39 15.7 Y 557
2024-06-13 21:06:52 C 15 56 30.45 -02 39 37.6 Y 557
2024-06-13 23:31:50 C 15 56 44.61 -02 45 47.8 Y 557
2024-06-13 23:42:07 C 15 56 45.62 -02 46 13.9 Y 557
2024-06-14 20:17:33 C 15 58 54.94 -03 37 44.1 V C40
2024-06-14 20:21:05 C 15 58 55.26 -03 37 52.7 V C40
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)