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
2024-06-14 20:24:38 C 15 58 55.61 -03 38 01.3 V C40
2024-06-14 20:28:10 C 15 58 55.91 -03 38 10.3 V C40
2024-06-14 20:31:42 C 15 58 56.27 -03 38 18.9 V C40
2024-06-14 20:35:09 C 15 58 56.58 -03 38 27.3 V C40
2024-06-14 20:38:31 C 15 58 56.90 -03 38 35.6 V C40
2024-06-14 20:41:53 C 15 58 57.21 -03 38 43.5 V C40
2024-06-14 20:45:14 C 15 58 57.54 -03 38 52.0 V C40
2024-06-15 09:24:21 C 16 00 14.758 -04 09 19.73 V T05
2024-06-15 10:01:28 C 16 00 18.082 -04 10 48.50 V T05
2024-06-15 10:06:40 C 16 00 18.545 -04 11 01.00 V T05
2024-06-15 10:42:15 C 16 00 21.758 -04 12 25.92 V T05
2024-06-15 22:09:02 C 16 01 31.21 -04 39 48.5 Y 557
2024-06-15 22:11:06 C 16 01 31.40 -04 39 53.3 Y 557
2024-06-15 22:13:09 C 16 01 31.59 -04 39 58.0 Y 557
2024-06-15 22:15:11 C 16 01 31.77 -04 40 02.8 Y 557
2024-06-16 07:03:45 C 16 02 23.453 -05 00 22.39 V 703
2024-06-16 07:07:04 C 16 02 23.719 -05 00 30.10 V 703
2024-06-16 07:10:22 C 16 02 24.029 -05 00 37.33 V 703
2024-06-16 07:13:40 C 16 02 24.313 -05 00 44.75 V 703
2024-06-16 20:26:46 C 16 03 41.86 -05 30 57.6 V C40
2024-06-16 20:30:30 C 16 03 42.18 -05 31 06.0 V C40
2024-06-16 20:34:14 C 16 03 42.51 -05 31 14.2 V C40
2024-06-16 20:37:57 C 16 03 42.84 -05 31 22.7 V C40
2024-06-16 20:41:40 C 16 03 43.17 -05 31 30.9 V C40
2024-06-16 20:44:37 C 16 03 44.08 -05 31 39.6 X G02
2024-06-16 20:45:23 C 16 03 43.49 -05 31 39.2 V C40
2024-06-16 20:49:07 C 16 03 43.82 -05 31 47.6 V C40
2024-06-16 20:50:11 C 16 03 44.58 -05 31 52.2 X G02
2024-06-16 20:52:51 C 16 03 44.15 -05 31 56.2 V C40
2024-06-16 20:55:46 C 16 03 45.07 -05 32 04.8 X G02
2024-06-16 20:56:34 C 16 03 44.48 -05 32 04.4 V C40
2024-06-16 21:01:35 C 16 03 45.71 -05 32 18.1 Y 557
2024-06-16 21:15:55 C 16 03 46.98 -05 32 50.3 Y 557
2024-06-16 22:22:23 B 16 03 52.954 -05 35 16.30 V 160
2024-06-16 22:28:06 B 16 03 53.431 -05 35 29.47 V 160
2024-06-16 22:33:43 B 16 03 53.945 -05 35 42.14 V 160
2024-06-16 23:48:10 C 16 04 00.51 -05 38 30.8 Y 557
2024-06-17 00:02:32 C 16 04 01.79 -05 39 02.8 Y 557
2024-06-18 20:30:17 C 16 08 12.08 -07 14 28.6 X G02
2024-06-18 20:35:52 C 16 08 12.56 -07 14 40.3 X G02
2024-06-18 20:41:28 C 16 08 13.03 -07 14 51.9 X G02
2024-06-21 22:14:27 C 16 14 37.961 -09 36 39.92 Z C23
2024-06-21 22:20:55 C 16 14 38.472 -09 36 50.62 Z C23
2024-06-21 22:28:17 C 16 14 39.098 -09 37 03.58 Z C23
2024-06-22 22:03:38 C 16 16 36.761 -10 18 39.20 Z C23
2024-06-22 22:18:46 C 16 16 37.862 -10 19 06.53 Z C23
2024-06-23 20:28:16 C 16 18 26.22 -10 56 35.9 X G02
2024-06-23 20:33:18 C 16 18 26.57 -10 56 44.2 X G02
2024-06-23 20:38:19 C 16 18 26.95 -10 56 52.4 X G02
2024-06-23 21:46:52 C 16 18 32.347 -10 58 46.52 Z C23
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)