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
2014-07-08 04:01:25 C 20 35 15.80 -19 49 49.0 q K93
2014-07-08 04:03:27 C 20 35 15.65 -19 49 50.2 q K93
2014-07-08 04:05:31 C 20 35 15.50 -19 49 51.6 q K93
2014-07-08 04:07:32 C 20 35 15.35 -19 49 52.9 q K93
2014-07-08 04:09:40 C 20 35 15.20 -19 49 54.2 q K93
2014-07-08 04:11:40 C 20 35 15.06 -19 49 55.4 q K93
2014-07-08 10:31:05 C 20 34 49.720 -19 54 17.37 L F51
2014-07-08 10:48:20 C 20 34 48.428 -19 54 28.62 L F51
2014-07-08 11:22:50 C 20 34 45.836 -19 54 51.12 L F51
2014-07-26 03:13:11 C 20 05 45.04 -23 44 01.7 u G32
2014-07-26 03:18:56 C 20 05 44.65 -23 44 04.1 u G32
2014-07-26 03:24:40 C 20 05 44.29 -23 44 06.7 u G32
2014-07-26 03:30:24 C 20 05 43.91 -23 44 09.2 u G32
2014-07-27 03:19:47 C 20 04 18.22 -23 53 51.6 u G32
2014-07-27 03:25:31 C 20 04 17.85 -23 53 54.3 u G32
2014-07-27 03:31:15 C 20 04 17.47 -23 53 56.6 u G32
2014-07-27 03:36:58 C 20 04 17.17 -23 53 58.5 u G32
2014-07-27 08:56:30 C 20 03 58.415 -23 56 15.27 L F51
2014-07-27 09:14:02 C 20 03 57.313 -23 56 22.30 L F51
2014-07-27 09:31:35 C 20 03 56.209 -23 56 29.34 L F51
2014-07-27 09:49:07 C 20 03 55.103 -23 56 36.33 L F51
2014-07-29 08:37:12 C 20 01 14.793 -24 14 24.31 L F51
2014-07-29 08:54:41 C 20 01 13.753 -24 14 30.77 L F51
2014-07-29 09:12:11 C 20 01 12.713 -24 14 37.31 L F51
2014-07-29 09:29:41 C 20 01 11.670 -24 14 43.76 L F51
2014-08-15 08:43:30 C 19 45 15.797 -25 54 59.11 L F51
2014-08-15 08:59:50 C 19 45 15.385 -25 55 01.46 L F51
2014-08-15 09:16:07 C 19 45 14.962 -25 55 03.70 L F51
2014-08-15 09:32:23 C 19 45 14.558 -25 55 05.97 L F51
2014-09-12 05:49:22 C 19 47 08.019 -26 13 01.95 L F51
2014-09-12 06:04:48 C 19 47 08.374 -26 13 00.97 L F51
2014-09-12 06:20:12 C 19 47 08.698 -26 13 00.18 L F51
2014-09-12 06:35:35 C 19 47 09.028 -26 12 59.19 L F51
2014-09-19 05:46:45 C 19 51 49.522 -26 00 03.05 L F51
2014-09-19 06:03:16 C 19 51 50.014 -26 00 01.49 L F51
2014-09-19 06:36:12 C 19 51 50.983 -25 59 58.70 L F51
2015-12-08 07:22:18 C 02 10 04.331 +05 01 53.23 L F51
2015-12-08 07:54:34 C 02 10 03.269 +05 01 52.45 L F51
2015-12-08 08:10:47 C 02 10 02.721 +05 01 52.31 L F51
2016-01-04 05:46:50 C 02 01 03.279 +05 53 52.61 L F51
2016-01-04 06:05:17 C 02 01 03.304 +05 53 55.97 L F51
2016-01-04 06:23:46 C 02 01 03.380 +05 53 59.13 L F51
2016-01-04 06:42:15 C 02 01 03.427 +05 54 02.49 L F51
2017-09-25 10:35:21 C 00 25 03.805 -07 12 17.20 L F51
2017-09-25 10:53:37 C 00 25 02.850 -07 12 23.19 L F51
2017-09-25 11:11:52 C 00 25 01.921 -07 12 29.23 L F51
2017-09-26 09:33:50 C 00 23 54.994 -07 19 53.77 L F51
2017-09-26 09:50:51 C 00 23 54.114 -07 19 59.62 L F51
2017-09-26 10:07:51 C 00 23 53.242 -07 20 05.17 L F51
2017-09-26 10:24:51 C 00 23 52.352 -07 20 10.63 L F51
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)