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
2024-01-08 12:29:49 C 07 46 20.006 +21 35 05.46 V T05
2024-01-10 07:56:27 C 07 44 03.563 +22 00 56.05 V G96
2024-01-10 08:03:50 C 07 44 03.120 +22 01 00.55 V G96
2024-01-10 08:11:12 C 07 44 02.681 +22 01 05.05 V G96
2024-01-10 08:18:36 C 07 44 02.238 +22 01 09.48 V G96
2024-01-10 12:55:37 C 07 43 46.500 +22 04 03.07 V T08
2024-01-10 13:00:18 C 07 43 46.248 +22 04 05.66 V T08
2024-01-10 13:08:26 C 07 43 45.737 +22 04 10.60 V T08
2024-01-10 13:22:44 C 07 43 44.890 +22 04 19.20 V T08
2024-01-10 23:17:04 B 07 43 12.790 +22 10 18.05 V L65
2024-01-10 23:21:42 B 07 43 12.511 +22 10 20.82 V L65
2024-01-10 23:26:23 B 07 43 12.194 +22 10 23.56 V L65
2024-01-11 05:30:39 C 07 42 52.290 +22 14 16.76 V 703
2024-01-11 05:33:37 C 07 42 52.074 +22 14 19.03 V 703
2024-01-11 05:36:34 C 07 42 51.926 +22 14 20.90 V 703
2024-01-11 05:39:33 C 07 42 51.728 +22 14 23.10 V 703
2024-01-11 11:39:22 C 07 42 30.331 +22 18 14.15 V T08
2024-01-11 12:17:04 C 07 42 27.974 +22 18 37.94 V T08
2024-01-11 12:22:14 C 07 42 27.646 +22 18 40.68 V T08
2024-01-11 13:04:26 C 07 42 25.020 +22 19 06.92 V T08
2024-01-11 21:05:39 B 07 41 58.68 +22 24 04.6 X K19
2024-01-11 21:11:00 B 07 41 58.36 +22 24 08.2 X K19
2024-01-11 21:16:22 B 07 41 58.03 +22 24 11.8 X K19
2024-01-12 21:31:06 B 07 40 31.84 +22 39 52.8 V 130
2024-01-12 21:37:33 B 07 40 31.46 +22 39 56.6 V 130
2024-01-12 21:45:07 B 07 40 30.95 +22 40 02.0 V 130
2024-01-12 21:54:35 B 07 40 30.35 +22 40 08.2 V 130
2024-01-13 22:44:24 C 07 38 58.27 +22 56 43.0 V 088
2024-01-13 22:48:57 C 07 38 57.88 +22 56 46.2 V 088
2024-01-13 22:52:52 C 07 38 57.64 +22 56 48.4 V 088
2024-01-13 22:56:13 C 07 38 57.48 +22 56 50.1 V 088
2024-01-13 23:00:17 C 07 38 57.21 +22 56 53.1 V 088
2024-01-13 23:04:50 C 07 38 56.92 +22 56 56.0 V 088
2024-01-13 23:08:46 C 07 38 56.62 +22 56 58.7 V 088
2024-01-13 23:12:08 C 07 38 56.40 +22 57 01.0 V 088
2024-01-13 23:16:12 C 07 38 56.14 +22 57 03.6 V 088
2024-01-13 23:20:43 C 07 38 55.81 +22 57 06.6 V 088
2024-01-13 23:24:39 C 07 38 55.53 +22 57 09.3 V 088
2024-01-13 23:28:01 C 07 38 55.33 +22 57 11.4 V 088
2024-01-14 05:50:13 C 07 38 32.294 +23 01 28.27 V 703
2024-01-14 05:53:11 C 07 38 32.078 +23 01 30.29 V 703
2024-01-14 05:56:10 C 07 38 31.870 +23 01 32.30 V 703
2024-01-14 05:59:08 C 07 38 31.679 +23 01 34.32 V 703
2024-01-14 10:27:33 C 07 38 14.246 +23 04 41.52 V T08
2024-01-14 10:32:38 C 07 38 13.886 +23 04 44.69 V T08
2024-01-14 11:15:58 C 07 38 10.884 +23 05 14.10 V T08
2024-01-14 11:26:31 C 07 38 10.159 +23 05 21.16 V T08
2024-01-15 06:11:23 C 07 36 58.579 +23 18 08.71 V 703
2024-01-15 06:14:44 C 07 36 58.345 +23 18 10.66 V 703
2024-01-15 06:18:04 C 07 36 58.093 +23 18 13.03 V 703
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)