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
2014-02-08 11:57:12 C 14 15 57.85 +03 08 31.0 o 711
2014-02-08 11:59:52 C 14 15 58.54 +03 08 29.3 o 711
2014-02-08 12:07:18 C 14 16 00.67 +03 08 24.1 q 448
2014-02-08 12:12:24 C 14 16 02.11 +03 08 21.3 q 448
2014-02-22 13:04:11 S 15 55 11.998 -00 10 21.90 L C51
2014-02-25 16:56:48 S 16 17 01.50 -00 53 39.5 L C51
2014-02-25 20:06:25 S 16 17 55.20 -00 55 26.7 L C51
2014-02-25 23:16:11 S 16 18 48.83 -00 57 12.8 L C51
2014-02-26 02:25:48 S 16 19 42.37 -00 58 57.5 L C51
2014-02-26 05:35:24 S 16 20 35.79 -01 00 42.9 L C51
2014-02-26 05:35:34 S 16 20 35.83 -01 00 42.7 L C51
2014-02-26 08:45:10 S 16 21 29.21 -01 02 27.4 L C51
2014-02-26 10:19:58 S 16 21 55.84 -01 03 19.9 L C51
2014-02-26 11:54:47 S 16 22 22.42 -01 04 12.7 L C51
2014-02-26 13:29:46 S 16 22 49.09 -01 05 04.1 L C51
2014-02-26 15:04:33 S 16 23 15.72 -01 05 56.5 L C51
2014-02-26 16:39:22 S 16 23 42.302 -01 06 48.46 L C51
2014-02-26 18:14:10 S 16 24 08.80 -01 07 40.8 L C51
2014-02-26 19:48:57 S 16 24 35.34 -01 08 32.8 L C51
2014-02-26 19:49:09 S 16 24 35.39 -01 08 32.5 L C51
2014-02-26 22:58:45 S 16 25 28.37 -01 10 16.1 L C51
2014-02-27 02:08:21 S 16 26 21.25 -01 11 59.6 L C51
2014-02-27 05:18:08 S 16 27 14.11 -01 13 43.1 L C51
2014-02-27 08:27:44 S 16 28 06.83 -01 15 26.2 L C51
2014-02-27 11:37:31 S 16 28 59.53 -01 17 09.0 L C51
2014-03-14 03:25:13 C 17 55 59.74 -03 57 58.9 q 160
2014-03-14 03:29:13 C 17 56 00.55 -03 58 00.8 q 160
2014-03-14 03:33:13 C 17 56 01.42 -03 58 02.9 q 160
2014-04-19 09:50:52 C 20 09 32.38 -07 04 03.4 u 807
2014-04-19 09:58:07 C 20 09 33.10 -07 04 04.4 u 807
2014-04-19 10:04:48 C 20 09 33.77 -07 04 05.3 u 807
2014-04-19 10:09:21 C 20 09 34.22 -07 04 05.9 u 807
2014-04-19 10:13:25 C 20 09 34.63 -07 04 06.5 u 807
2014-05-03 03:16:06 S 20 39 07.159 -07 49 41.48 L C51
2014-05-03 06:25:31 S 20 39 21.29 -07 50 10.8 L C51
2014-05-03 06:25:43 S 20 39 21.317 -07 50 12.05 L C51
2014-05-03 09:35:07 S 20 39 35.527 -07 50 42.04 L C51
2014-05-03 12:44:44 S 20 39 49.57 -07 51 10.6 L C51
2014-05-03 15:54:19 S 20 40 03.60 -07 51 43.0 L C51
2014-05-04 02:57:34 S 20 40 52.17 -07 53 28.3 L C51
2014-05-04 02:57:45 S 20 40 52.19 -07 53 27.8 L C51
2014-05-04 04:32:22 S 20 40 59.06 -07 53 43.3 L C51
2014-05-04 09:16:46 S 20 41 19.668 -07 54 30.53 L C51
2014-05-04 12:26:22 S 20 41 33.37 -07 55 01.3 L C51
2014-05-08 10:37:37 C 20 47 57.11 -08 11 34.7 q G96
2014-05-08 10:47:21 C 20 47 57.67 -08 11 36.5 q G96
2014-05-08 10:57:06 C 20 47 58.27 -08 11 38.5 q G96
2014-05-08 11:06:51 C 20 47 58.84 -08 11 40.4 q G96
2014-05-27 03:15:53 C 21 06 58.20 -10 09 10.5 c J04
2014-05-27 03:32:34 C 21 06 58.44 -10 09 15.9 c J04
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)