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
2024-06-08 20:00:55 C 15 42 25.84 +03 07 16.8 V 088
2024-06-08 20:01:26 C 15 42 25.60 +03 07 02.9 V C40
2024-06-08 20:02:17 C 15 42 26.01 +03 07 11.9 V 088
2024-06-08 20:03:39 C 15 42 26.16 +03 07 07.1 V 088
2024-06-08 20:05:10 C 15 42 26.04 +03 06 51.1 V C40
2024-06-08 20:05:15 C 15 42 26.37 +03 07 02.4 V 088
2024-06-08 20:06:52 C 15 42 26.52 +03 06 57.9 V 088
2024-06-08 20:08:29 C 15 42 26.69 +03 06 52.6 V 088
2024-06-08 20:08:53 C 15 42 26.47 +03 06 39.1 V C40
2024-06-08 20:12:38 C 15 42 26.90 +03 06 27.2 V C40
2024-06-08 20:16:21 C 15 42 27.34 +03 06 15.4 V C40
2024-06-08 22:03:23 C 15 42 41.606 +03 00 33.59 X Z43
2024-06-08 22:18:20 C 15 42 43.358 +02 59 46.28 X Z43
2024-06-08 22:32:53 C 15 42 45.077 +02 59 00.10 X Z43
2024-06-08 23:05:16 C 15 42 48.888 +02 57 17.89 X Z43
2024-06-08 23:26:54 C 15 42 51.434 +02 56 09.24 X Z43
2024-06-09 00:15:21 C 15 42 56.928 +02 53 34.26 Z C23
2024-06-09 00:18:14 C 15 42 57.271 +02 53 25.37 Z C23
2024-06-09 00:21:08 C 15 42 57.634 +02 53 16.04 Z C23
2024-06-09 09:08:43 C 15 44 03.181 +02 25 55.74 V 703
2024-06-09 09:11:59 C 15 44 03.563 +02 25 45.37 V 703
2024-06-09 09:15:14 C 15 44 03.926 +02 25 35.65 V 703
2024-06-09 09:15:31 C 15 44 05.842 +02 25 45.05 V T08
2024-06-09 09:18:30 C 15 44 04.283 +02 25 23.59 V 703
2024-06-09 09:30:15 C 15 44 07.478 +02 24 59.26 V T08
2024-06-09 09:34:54 C 15 44 08.004 +02 24 44.82 V T08
2024-06-09 09:51:26 C 15 44 09.850 +02 23 53.59 V T08
2024-06-09 21:15:02 C 15 45 35.750 +01 48 29.88 Z C23
2024-06-09 22:19:31 C 15 45 43.111 +01 45 13.61 Z C23
2024-06-09 23:06:47 C 15 45 47.26 +01 42 53.6 V C40
2024-06-09 23:10:31 C 15 45 47.69 +01 42 42.3 V C40
2024-06-09 23:14:14 C 15 45 48.12 +01 42 31.1 V C40
2024-06-09 23:17:57 C 15 45 48.55 +01 42 19.8 V C40
2024-06-09 23:21:41 C 15 45 48.99 +01 42 08.4 V C40
2024-06-09 23:25:24 C 15 45 49.42 +01 41 57.3 V C40
2024-06-09 23:29:09 C 15 45 49.85 +01 41 45.9 V C40
2024-06-09 23:32:53 C 15 45 50.27 +01 41 34.5 V C40
2024-06-09 23:36:36 C 15 45 50.72 +01 41 23.5 V C40
2024-06-10 09:04:17 C 15 47 01.332 +01 13 14.53 X F51
2024-06-10 09:23:56 C 15 47 03.430 +01 12 16.10 X F51
2024-06-10 09:43:36 C 15 47 05.547 +01 11 17.49 X F51
2024-06-10 10:03:13 C 15 47 07.661 +01 10 18.89 X F51
2024-06-10 20:44:25 C 15 48 25.32 +00 38 29.4 Y 557
2024-06-10 20:49:04 C 15 48 25.83 +00 38 15.8 Y 557
2024-06-10 20:53:43 C 15 48 26.33 +00 38 02.3 Y 557
2024-06-10 21:59:31 C 15 48 32.59 +00 34 53.1 V C40
2024-06-10 22:02:33 C 15 48 34.464 +00 34 42.71 X Z43
2024-06-10 22:03:15 C 15 48 33.00 +00 34 42.3 V C40
2024-06-10 22:06:59 C 15 48 33.41 +00 34 31.4 V C40
2024-06-10 22:10:43 C 15 48 33.82 +00 34 20.6 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)