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
2014-05-27 04:05:54 C 21 06 58.97 -10 09 28.4 c J04
2014-05-28 10:30:50 C 21 07 32.29 -10 20 38.5 q 703
2014-05-28 10:39:44 C 21 07 32.42 -10 20 41.7 q 703
2014-05-28 10:48:38 C 21 07 32.56 -10 20 46.2 q 703
2014-05-28 10:57:32 C 21 07 32.69 -10 20 47.4 q 703
2014-06-05 12:58:58 C 21 08 44.812 -11 43 19.37 L F51
2014-06-05 13:16:10 C 21 08 44.650 -11 43 27.66 L F51
2014-06-05 13:33:21 C 21 08 44.495 -11 43 35.95 L F51
2014-06-05 13:50:36 C 21 08 44.327 -11 43 44.26 L F51
2014-06-05 14:08:22 C 21 08 44.156 -11 43 52.81 L F51
2014-06-05 14:25:41 C 21 08 43.986 -11 44 01.11 L F51
2014-06-10 08:43:14 C 21 07 31.02 -12 42 07.6 q 703
2014-06-10 08:49:43 C 21 07 30.89 -12 42 10.2 q 703
2014-06-10 08:56:13 C 21 07 30.64 -12 42 14.8 q 703
2014-06-10 09:02:42 C 21 07 30.62 -12 42 18.1 q 703
2014-06-19 09:37:29 C 21 01 20.54 -14 49 42.6 q 703
2014-06-19 09:47:15 C 21 01 20.14 -14 49 48.1 q 703
2014-06-19 09:56:57 C 21 01 19.67 -14 49 54.4 q 703
2014-06-19 10:06:37 C 21 01 19.28 -14 50 01.3 q 703
2014-06-21 08:28:09 C 20 59 22.80 -15 19 44.6 o 691
2014-06-21 08:53:46 C 20 59 21.55 -15 20 01.5 o 691
2014-06-21 09:24:25 C 20 59 20.00 -15 20 23.9 o 691
2014-06-21 09:41:44 C 20 59 19.13 -15 20 33.4 R G45
2014-06-21 09:58:08 C 20 59 18.30 -15 20 44.1 R G45
2014-06-21 10:14:32 C 20 59 17.53 -15 20 54.5 R G45
2014-06-21 10:30:57 C 20 59 16.71 -15 21 06.2 R G45
2014-06-21 10:47:21 C 20 59 15.93 -15 21 16.6 R G45
2014-06-21 13:22:38 C 20 59 09.192 -15 22 54.18 L F51
2014-06-21 13:38:58 C 20 59 08.375 -15 23 04.81 L F51
2014-06-21 13:55:13 C 20 59 07.559 -15 23 15.33 L F51
2014-06-21 14:11:29 C 20 59 06.745 -15 23 25.89 L F51
2014-06-22 11:47:55 C 20 58 08.016 -15 37 33.17 L F51
2014-06-22 12:06:30 C 20 58 07.056 -15 37 45.46 L F51
2014-06-22 12:25:02 C 20 58 06.091 -15 37 57.73 L F51
2014-06-23 09:29:26 C 20 57 05.39 -15 51 54.9 R G45
2014-06-23 09:43:48 C 20 57 04.67 -15 52 05.0 R G45
2014-06-23 09:45:50 C 20 57 04.47 -15 52 05.5 R G45
2014-06-23 10:21:47 C 20 57 02.59 -15 52 29.4 R G45
2014-06-23 10:36:14 C 20 57 01.84 -15 52 39.7 R G45
2014-06-23 10:38:17 C 20 57 01.69 -15 52 40.8 R G45
2014-06-25 08:30:08 C 20 54 41.99 -16 23 16.9 o 691
2014-06-25 08:55:45 C 20 54 40.46 -16 23 33.7 o 691
2014-06-25 09:21:24 C 20 54 39.04 -16 23 51.8 o 691
2014-06-27 10:28:05 C 20 51 56.45 -16 57 02.8 q G96
2014-06-27 10:31:07 C 20 51 56.26 -16 57 05.0 q G96
2014-06-27 10:34:07 C 20 51 56.14 -16 57 07.6 q G96
2014-06-27 10:37:10 C 20 51 56.02 -16 57 09.2 q G96
2014-06-28 10:26:55 C 20 50 33.999 -17 13 16.75 L F51
2014-06-28 10:44:06 C 20 50 32.913 -17 13 28.66 L F51
2014-06-28 11:01:14 C 20 50 31.831 -17 13 40.50 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)