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
2024-05-19 22:04:36 C 13 58 30.40 +37 39 05.4 Y 557
2024-05-19 22:14:02 C 13 58 33.58 +37 38 20.3 Y 557
2024-05-19 22:59:24 C 13 58 49.858 +37 34 43.39 V Z80
2024-05-19 23:03:28 C 13 58 51.250 +37 34 23.74 V Z80
2024-05-19 23:07:27 C 13 58 52.622 +37 34 04.98 V Z80
2024-05-20 06:46:53 C 14 01 32.668 +36 57 58.75 V 703
2024-05-20 06:50:13 C 14 01 33.766 +36 57 42.59 V 703
2024-05-20 06:53:34 C 14 01 34.842 +36 57 26.60 V 703
2024-05-20 06:56:54 C 14 01 35.936 +36 57 10.22 V 703
2024-05-20 09:45:17 C 14 02 34.296 +36 43 59.66 V T05
2024-05-20 09:57:37 C 14 02 38.268 +36 42 59.76 V T05
2024-05-20 10:02:39 C 14 02 39.888 +36 42 35.17 V T05
2024-05-21 08:09:08 C 14 10 04.696 +34 55 33.85 V 703
2024-05-21 08:12:30 C 14 10 05.754 +34 55 17.08 V 703
2024-05-21 08:15:53 C 14 10 06.798 +34 55 00.37 V 703
2024-05-21 08:19:15 C 14 10 07.849 +34 54 43.88 V 703
2024-05-21 09:26:45 C 14 10 31.946 +34 49 38.50 V T08
2024-05-21 09:32:05 C 14 10 33.557 +34 49 12.58 V T08
2024-05-21 09:42:59 C 14 10 36.862 +34 48 19.08 V T08
2024-05-21 09:57:42 C 14 10 41.321 +34 47 06.65 V T08
2024-05-21 20:55:25 C 14 14 14.87 +33 53 05.8 X L18
2024-05-21 20:56:17 C 14 14 15.06 +33 53 01.8 X L18
2024-05-21 20:57:08 C 14 14 15.37 +33 52 57.4 X L18
2024-05-21 20:58:00 C 14 14 15.62 +33 52 53.7 X L18
2024-05-21 20:58:52 C 14 14 15.92 +33 52 48.8 X L18
2024-05-22 02:22:32 C 14 16 00.01 +33 26 36.5 V W53
2024-05-22 02:33:16 C 14 16 03.24 +33 25 44.4 V W53
2024-05-22 02:44:45 C 14 16 06.57 +33 24 48.1 V W53
2024-05-22 04:17:38 C 14 16 33.92 +33 17 13.0 V W53
2024-05-22 04:28:22 C 14 16 37.10 +33 16 20.2 V W53
2024-05-22 04:39:52 C 14 16 40.45 +33 15 23.7 V W53
2024-05-22 08:21:15 C 14 17 47.695 +32 57 20.92 V 703
2024-05-22 08:24:33 C 14 17 48.671 +32 57 04.25 V 703
2024-05-22 08:27:51 C 14 17 49.639 +32 56 47.76 V 703
2024-05-22 08:31:09 C 14 17 50.604 +32 56 31.49 V 703
2024-05-22 09:05:57 C 14 18 04.034 +32 54 04.82 V T08
2024-05-22 09:13:24 C 14 18 06.170 +32 53 28.21 V T08
2024-05-22 09:18:43 C 14 18 07.692 +32 53 01.93 V T08
2024-05-22 09:33:29 C 14 18 11.926 +32 51 49.03 V T08
2024-05-22 11:52:37 C 14 18 52.197 +32 40 14.11 X F51
2024-05-22 12:11:15 C 14 18 57.649 +32 38 40.45 X F51
2024-05-22 12:29:52 C 14 19 03.126 +32 37 06.61 X F51
2024-05-22 12:48:32 C 14 19 08.640 +32 35 32.52 X F51
2024-05-23 21:57:29 B 14 29 00.869 +29 52 15.71 V 160
2024-05-23 22:02:28 B 14 29 02.225 +29 51 51.30 V 160
2024-05-23 22:07:09 B 14 29 03.490 +29 51 28.12 V 160
2024-05-24 21:49:31 C 14 35 36.70 +27 54 52.5 M32
2024-05-24 21:51:00 C 14 35 37.09 +27 54 45.0 M32
2024-05-24 21:52:30 C 14 35 37.46 +27 54 37.6 M32
2024-05-24 21:53:59 C 14 35 37.84 +27 54 30.5 M32
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)