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
2018-11-09 10:58:31 C 08 10 39.04 +16 58 10.4 V G96
2018-11-09 11:05:53 C 08 10 39.56 +16 58 08.7 V G96
2018-11-09 11:13:14 C 08 10 40.04 +16 58 07.5 V G96
2018-11-09 11:20:36 C 08 10 40.48 +16 58 06.8 V G96
2018-12-04 10:23:31 C 08 49 30.49 +15 44 47.8 V G96
2018-12-04 10:30:54 C 08 49 30.93 +15 44 47.0 V G96
2018-12-04 10:38:19 C 08 49 31.34 +15 44 46.6 V G96
2018-12-04 10:45:43 C 08 49 31.82 +15 44 46.1 V G96
2018-12-13 09:27:33 C 09 02 21.30 +15 35 05.4 V 703
2018-12-13 09:35:10 C 09 02 21.75 +15 35 04.5 V 703
2018-12-13 09:42:46 C 09 02 22.19 +15 35 04.3 V 703
2018-12-13 09:50:24 C 09 02 22.59 +15 35 05.1 V 703
2018-12-13 20:33:44 C 09 02 59.66 +15 34 59.5 q D29
2018-12-13 20:54:06 C 09 03 00.78 +15 34 59.2 q D29
2018-12-13 21:14:29 C 09 03 01.88 +15 34 59.5 q D29
2018-12-20 07:50:48 C 09 11 52.79 +15 38 58.6 V G96
2018-12-20 08:05:40 C 09 11 53.61 +15 38 59.2 V G96
2018-12-20 08:13:05 C 09 11 54.00 +15 38 59.8 V G96
2018-12-30 18:41:29 C 09 25 37.94 +16 12 00.4 q D29
2018-12-30 18:57:26 C 09 25 38.74 +16 12 04.1 q D29
2018-12-30 19:13:23 C 09 25 39.54 +16 12 07.8 q D29
2018-12-31 12:38:22 C 09 26 35.68 +16 16 01.0 V T05
2018-12-31 13:00:06 C 09 26 36.69 +16 16 05.8 V T05
2018-12-31 13:09:12 C 09 26 37.16 +16 16 08.3 V T05
2018-12-31 13:26:26 C 09 26 37.99 +16 16 11.7 V T05
2019-01-03 02:58:42 C 09 29 54.08 +16 31 36.7 q 160
2019-01-03 03:02:34 C 09 29 54.24 +16 31 37.7 q 160
2019-01-03 03:06:27 C 09 29 54.45 +16 31 38.5 q 160
2019-01-04 13:01:02 C 09 31 42.18 +16 41 39.8 V T05
2019-01-04 13:05:51 C 09 31 42.44 +16 41 40.9 V T05
2019-01-04 13:09:04 C 09 31 42.58 +16 41 42.6 V T05
2019-01-04 13:09:43 C 09 31 42.64 +16 41 42.5 V T05
2019-01-04 13:23:10 C 09 31 43.25 +16 41 46.5 V T05
2019-01-04 13:36:49 C 09 31 43.91 +16 41 51.0 V T05
2019-01-06 14:54:21 C 09 34 19.077 +16 58 06.49 U F51
2019-01-06 15:25:59 C 09 34 20.589 +16 58 17.26 U F51
2019-01-06 15:41:49 C 09 34 21.356 +16 58 22.63 U F51
2019-01-08 11:30:17 C 09 36 39.68 +17 14 46.5 V G96
2019-01-08 11:37:46 C 09 36 40.04 +17 14 49.5 V G96
2019-01-08 11:45:16 C 09 36 40.39 +17 14 52.4 V G96
2019-01-08 11:52:44 C 09 36 40.75 +17 14 55.3 V G96
2019-01-08 12:53:59 C 09 36 44.80 +17 15 22.8 V T05
2019-01-08 13:04:11 C 09 36 45.05 +17 15 28.7 V T05
2019-01-08 13:19:51 C 09 36 45.76 +17 15 34.6 V T05
2019-01-08 13:35:07 C 09 36 46.48 +17 15 40.9 V T05
2019-01-12 07:33:42 C 09 41 31.53 +17 55 53.5 V 703
2019-01-12 07:41:19 C 09 41 31.91 +17 55 58.2 V 703
2019-01-12 07:48:56 C 09 41 32.24 +17 56 02.1 V 703
2019-01-12 07:56:32 C 09 41 32.63 +17 56 06.0 V 703
2019-01-12 12:34:00 C 09 41 46.80 +17 58 30.1 V T05
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)