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
2024-06-06 21:35:57 C 15 36 14.01 +05 40 40.5 M32
2024-06-06 21:36:24 C 15 36 14.07 +05 40 38.8 M32
2024-06-06 21:39:59 C 15 36 14.52 +05 40 26.5 M32
2024-06-06 22:07:00 C 15 36 19.039 +05 38 53.59 X Z43
2024-06-06 22:23:48 C 15 36 21.192 +05 37 56.10 X Z43
2024-06-06 22:37:41 C 15 36 22.973 +05 37 08.22 X Z43
2024-06-07 07:41:26 C 15 37 36.368 +05 06 25.63 V 703
2024-06-07 07:44:46 C 15 37 36.786 +05 06 14.47 V 703
2024-06-07 07:48:06 C 15 37 37.207 +05 06 03.10 V 703
2024-06-07 07:51:27 C 15 37 37.621 +05 05 51.61 V 703
2024-06-07 09:18:40 C 15 37 50.638 +05 01 07.39 V T05
2024-06-07 09:23:53 C 15 37 51.274 +05 00 49.79 V T05
2024-06-07 09:33:29 C 15 37 52.445 +05 00 17.42 V T05
2024-06-07 09:49:26 C 15 37 54.386 +04 59 23.46 V T05
2024-06-07 20:09:55 C 15 39 19.27 +04 24 27.2 X G02
2024-06-07 20:15:31 C 15 39 19.98 +04 24 09.0 X G02
2024-06-07 20:21:05 C 15 39 20.66 +04 23 50.7 X G02
2024-06-07 21:30:48 C 15 39 29.45 +04 19 59.4 Y 557
2024-06-07 21:34:57 C 15 39 29.95 +04 19 45.7 Y 557
2024-06-07 21:40:29 C 15 39 30.63 +04 19 27.5 Y 557
2024-06-07 21:44:04 C 15 39 30.07 +04 19 18.5 V C40
2024-06-07 21:46:17 B 15 39 31.500 +04 19 11.89 V 160
2024-06-07 21:47:48 C 15 39 30.53 +04 19 06.2 V C40
2024-06-07 21:51:12 B 15 39 32.069 +04 18 56.12 V 160
2024-06-07 21:51:33 C 15 39 30.99 +04 18 53.8 V C40
2024-06-07 21:55:16 C 15 39 31.45 +04 18 41.5 V C40
2024-06-07 21:56:11 B 15 39 32.688 +04 18 39.20 V 160
2024-06-07 21:58:59 C 15 39 31.92 +04 18 29.2 V C40
2024-06-07 22:02:43 C 15 39 32.38 +04 18 16.8 V C40
2024-06-07 22:06:27 C 15 39 32.84 +04 18 04.5 V C40
2024-06-07 22:07:48 C 15 39 34.435 +04 17 56.00 Z C23
2024-06-07 22:10:11 C 15 39 33.30 +04 17 52.3 V C40
2024-06-07 22:13:54 C 15 39 33.76 +04 17 39.9 V C40
2024-06-07 22:39:43 C 15 39 38.314 +04 16 11.03 Z C23
2024-06-07 22:44:11 C 15 39 38.851 +04 15 56.41 Z C23
2024-06-08 00:46:54 C 15 39 53.77 +04 09 12.5 Y 557
2024-06-08 00:49:39 C 15 39 54.12 +04 09 03.2 Y 557
2024-06-08 00:52:24 C 15 39 54.47 +04 08 54.3 Y 557
2024-06-08 09:08:54 C 15 41 01.166 +03 42 17.35 V T08
2024-06-08 09:13:46 C 15 41 01.730 +03 42 01.58 V T08
2024-06-08 09:21:36 C 15 41 02.647 +03 41 36.20 V T08
2024-06-08 09:36:09 C 15 41 04.339 +03 40 49.08 V T08
2024-06-08 19:46:32 C 15 42 23.83 +03 07 50.3 V C40
2024-06-08 19:50:16 C 15 42 24.28 +03 07 38.5 V C40
2024-06-08 19:54:00 C 15 42 24.72 +03 07 26.6 V C40
2024-06-08 19:56:11 C 15 42 25.32 +03 07 31.2 V 088
2024-06-08 19:57:18 C 15 42 25.45 +03 07 27.5 V 088
2024-06-08 19:57:44 C 15 42 25.16 +03 07 14.7 V C40
2024-06-08 19:58:25 C 15 42 25.59 +03 07 23.9 V 088
2024-06-08 19:59:32 C 15 42 25.70 +03 07 20.5 V 088
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)