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
2009-07-14 04:02:20 C 21 28 32.79 -18 24 59.0 18.8 r I36
2009-07-14 04:14:02 C 21 28 32.00 -18 25 05.8 18.4 r I36
2009-07-14 06:52:55 C 21 28 22.19 -18 26 52.9 o H55
2009-07-14 07:01:25 C 21 28 21.60 -18 26 57.3 o H55
2009-07-14 07:10:25 C 21 28 21.04 -18 27 02.6 o H55
2010-11-15 12:20:17 C 02 50 12.94 +07 22 29.4 o F65
2010-11-15 12:30:26 C 02 50 12.36 +07 22 27.4 o F65
2010-11-15 12:40:35 C 02 50 11.78 +07 22 25.5 o F65
2010-12-06 03:00:48 C 02 25 48.02 +06 17 36.6 o H21
2010-12-06 03:25:53 C 02 25 47.01 +06 17 35.6 o H21
2010-12-06 03:50:10 C 02 25 46.01 +06 17 34.8 o H21
2012-09-24 05:33:55 C 00 40 34.38 -05 33 52.0 u H21
2012-09-24 05:54:51 C 00 40 33.34 -05 33 59.5 u H21
2012-09-24 06:14:48 C 00 40 32.33 -05 34 06.6 u H21
2013-10-31 11:18:40 C 08 28 23.49 +16 37 47.6 q G96
2013-10-31 11:27:41 C 08 28 24.32 +16 37 45.0 q G96
2013-10-31 11:36:42 C 08 28 25.14 +16 37 43.6 q G96
2013-10-31 11:45:42 C 08 28 25.89 +16 37 41.7 q G96
2013-12-07 10:12:21 C 09 52 27.89 +12 35 58.2 u H21
2013-12-07 10:22:31 C 09 52 28.92 +12 35 54.7 u H21
2013-12-07 10:32:54 C 09 52 29.98 +12 35 51.9 u H21
2013-12-11 11:42:18 C 10 02 52.09 +12 06 37.2 q 703
2013-12-11 11:49:37 C 10 02 52.80 +12 06 36.1 q 703
2013-12-11 11:56:58 C 10 02 53.57 +12 06 34.2 q 703
2013-12-11 12:04:17 C 10 02 54.65 +12 06 31.2 q 703
2013-12-11 12:06:33 C 10 02 54.72 +12 06 30.1 q G96
2013-12-11 12:14:34 C 10 02 55.54 +12 06 27.9 q G96
2013-12-11 12:22:34 C 10 02 56.39 +12 06 25.5 q G96
2013-12-11 12:30:35 C 10 02 57.25 +12 06 23.0 q G96
2013-12-26 11:50:08 C 10 45 27.86 +10 14 59.4 q 703
2013-12-26 12:01:01 C 10 45 29.22 +10 14 57.1 q 703
2013-12-26 12:11:52 C 10 45 30.50 +10 14 53.6 q 703
2013-12-26 12:22:45 C 10 45 31.83 +10 14 49.6 q 703
2013-12-30 02:57:28 C 10 57 06.11 +09 47 12.3 19.4 u J43
2013-12-30 03:12:11 C 10 57 08.10 +09 47 07.3 19.7 u J43
2013-12-30 03:26:52 C 10 57 10.10 +09 47 02.7 19.8 u J43
2013-12-30 03:41:33 C 10 57 12.01 +09 46 58.2 18.6 u J43
2013-12-31 19:34:36 C 11 02 44.91 +09 34 05.6 q D29
2013-12-31 20:01:48 C 11 02 48.62 +09 33 57.2 q D29
2014-01-14 09:24:33 C 11 54 44.85 +07 43 07.0 u H21
2014-01-14 09:29:08 C 11 54 45.66 +07 43 05.2 u H21
2014-01-14 09:32:49 C 11 54 46.31 +07 43 03.9 u H21
2014-01-14 10:35:31 C 11 54 57.81 +07 42 43.7 q 703
2014-01-14 10:45:00 C 11 54 59.52 +07 42 39.7 q 703
2014-01-14 10:54:30 C 11 55 01.19 +07 42 36.0 q 703
2014-01-14 11:03:57 C 11 55 02.89 +07 42 32.3 q 703
2014-02-08 11:45:50 C 14 15 54.73 +03 08 36.2 q 448
2014-02-08 11:51:44 C 14 15 56.36 +03 08 32.8 q 448
2014-02-08 11:54:40 C 14 15 57.15 +03 08 32.2 o 711
2014-02-08 11:56:45 C 14 15 57.75 +03 08 30.3 q 448
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)