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
2024-05-28 09:45:52 C 14 56 07.400 +21 11 44.34 V 703
2024-05-28 09:49:12 C 14 56 08.092 +21 11 28.36 V 703
2024-05-28 09:52:33 C 14 56 08.812 +21 11 12.52 V 703
2024-05-28 09:55:54 C 14 56 09.532 +21 10 56.82 V 703
2024-05-28 09:58:25 C 14 56 12.372 +21 11 07.19 V T05
2024-05-29 06:45:28 C 15 00 46.450 +19 34 56.02 X F52
2024-05-29 07:04:20 C 15 00 50.132 +19 33 30.82 X F52
2024-05-29 07:42:29 C 15 00 57.570 +19 30 37.13 X F52
2024-05-29 11:20:26 C 15 01 39.581 +19 13 59.95 V T08
2024-05-29 11:24:26 C 15 01 40.363 +19 13 41.56 V T08
2024-05-29 11:32:24 C 15 01 41.921 +19 13 04.76 V T08
2024-05-29 20:23:41 C 15 03 35.66 +18 32 25.8 X G02
2024-05-29 20:31:31 C 15 03 37.18 +18 31 50.4 X G02
2024-05-29 20:39:19 C 15 03 38.68 +18 31 15.3 X G02
2024-05-29 22:40:17 C 15 04 02.657 +18 22 07.75 Z C23
2024-05-29 22:43:15 C 15 04 03.310 +18 21 54.29 Z C23
2024-05-29 22:46:14 C 15 04 03.785 +18 21 40.93 Z C23
2024-05-30 08:49:07 C 15 06 03.625 +17 36 53.42 V 703
2024-05-30 08:52:23 C 15 06 04.244 +17 36 38.70 V 703
2024-05-30 08:55:39 C 15 06 04.860 +17 36 23.76 V 703
2024-05-30 08:58:56 C 15 06 05.497 +17 36 08.86 V 703
2024-05-30 09:23:24 C 15 06 12.562 +17 34 38.68 V T08
2024-05-30 09:40:55 C 15 06 15.749 +17 33 20.41 V T08
2024-05-30 09:45:34 C 15 06 16.591 +17 32 59.60 V T08
2024-05-30 09:53:44 C 15 06 18.082 +17 32 23.10 V T08
2024-05-30 22:00:20 C 15 08 41.98 +16 38 18.7 Y 557
2024-05-30 22:06:23 C 15 08 43.07 +16 37 52.2 Y 557
2024-05-30 22:12:29 C 15 08 44.19 +16 37 25.5 Y 557
2024-05-31 00:14:38 C 15 09 06.53 +16 28 27.2 Y 557
2024-05-31 00:18:17 C 15 09 07.20 +16 28 11.2 Y 557
2024-05-31 00:21:55 C 15 09 07.86 +16 27 55.5 Y 557
2024-05-31 22:47:41 B 15 13 22.852 +14 51 11.07 V L92
2024-05-31 22:49:42 B 15 13 23.316 +14 51 02.39 V L92
2024-05-31 22:51:43 B 15 13 23.622 +14 50 55.82 V L92
2024-05-31 22:53:44 B 15 13 23.835 +14 50 47.85 V L92
2024-05-31 23:03:56 B 15 13 25.559 +14 50 05.28 V L92
2024-05-31 23:14:02 B 15 13 27.337 +14 49 20.79 V L92
2024-06-01 07:10:57 C 15 14 54.704 +14 15 46.94 V 703
2024-06-01 07:14:16 C 15 14 55.259 +14 15 32.83 V 703
2024-06-01 07:17:36 C 15 14 55.813 +14 15 18.72 V 703
2024-06-01 07:20:56 C 15 14 56.360 +14 15 04.64 V 703
2024-06-01 09:26:45 C 15 15 19.841 +14 06 29.02 V T08
2024-06-01 09:34:20 C 15 15 21.077 +14 05 57.08 V T08
2024-06-01 09:39:33 C 15 15 21.986 +14 05 34.08 V T05
2024-06-01 09:43:10 C 15 15 22.526 +14 05 19.90 V T08
2024-06-01 09:44:06 C 15 15 22.730 +14 05 14.89 V T05
2024-06-01 09:50:52 C 15 15 23.830 +14 04 46.31 V T05
2024-06-01 09:52:10 C 15 15 24.041 +14 04 40.84 V T05
2024-06-01 09:55:25 C 15 15 24.578 +14 04 27.12 V T05
2024-06-01 09:59:32 C 15 15 25.198 +14 04 10.88 V T08
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)