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
2024-03-19 08:23:54 C 06 36 09.862 +43 39 04.14 V T08
2024-03-20 21:23:49 C 06 38 24.898 +44 10 07.18 Z C23
2024-03-20 21:28:26 C 06 38 25.183 +44 10 10.67 Z C23
2024-03-20 21:31:39 C 06 38 25.382 +44 10 14.12 Z C23
2024-03-21 05:54:54 C 06 38 58.659 +44 17 44.82 X F52
2024-03-21 06:12:54 C 06 38 59.600 +44 17 59.80 X F52
2024-03-21 06:30:52 C 06 39 00.555 +44 18 14.62 X F52
2024-03-21 06:48:57 C 06 39 01.517 +44 18 29.38 X F52
2024-03-22 06:26:31 C 06 40 37.454 +44 38 48.95 V T05
2024-03-22 06:31:44 C 06 40 37.728 +44 38 52.94 V T05
2024-03-22 06:59:10 C 06 40 39.331 +44 39 15.66 V T05
2024-03-22 07:10:12 C 06 40 39.950 +44 39 24.59 V T05
2024-03-23 07:47:45 C 06 42 25.817 +45 00 46.22 V T08
2024-03-23 07:55:18 C 06 42 26.266 +45 00 52.02 V T08
2024-03-23 08:07:33 C 06 42 27.043 +45 01 01.67 V T08
2024-03-23 08:11:33 C 06 42 27.314 +45 01 04.66 V T08
2024-03-24 21:26:01 C 06 45 21.818 +45 33 35.57 Z C23
2024-03-24 21:51:07 C 06 45 23.657 +45 33 57.13 Z C23
2024-03-27 21:05:13 C 06 51 40.817 +46 38 09.60 Z C23
2024-03-27 21:09:32 C 06 51 41.201 +46 38 12.59 Z C23
2024-03-27 21:14:56 C 06 51 41.700 +46 38 17.77 Z C23
2024-03-28 04:48:21 C 06 52 24.744 +46 45 21.82 V 703
2024-03-28 04:51:40 C 06 52 25.064 +46 45 26.14 V 703
2024-03-28 04:54:58 C 06 52 25.262 +46 45 29.05 V 703
2024-03-28 04:58:17 C 06 52 25.590 +46 45 30.74 V 703
2024-03-29 07:48:48 C 06 55 06.031 +47 10 25.72 V T08
2024-03-29 08:26:37 C 06 55 09.547 +47 10 57.43 V T08
2024-03-29 08:54:38 C 06 55 12.199 +47 11 20.58 V T08
2024-03-29 09:03:55 C 06 55 13.090 +47 11 28.07 V T08
2024-03-30 02:41:48 C 06 57 06.318 +47 28 00.44 V G96
2024-03-30 02:50:01 C 06 57 07.088 +47 28 08.00 V G96
2024-03-30 02:58:13 C 06 57 07.855 +47 28 15.42 V G96
2024-03-30 03:06:25 C 06 57 08.615 +47 28 22.76 V G96
2024-03-30 06:40:47 C 06 57 31.034 +47 31 49.22 V T05
2024-03-30 06:46:33 C 06 57 31.560 +47 31 54.05 V T05
2024-03-30 06:48:39 C 06 57 31.757 +47 31 55.99 V T05
2024-03-30 06:53:13 C 06 57 32.196 +47 32 00.10 V T05
2024-03-30 06:54:31 C 06 57 32.340 +47 32 01.07 V T05
2024-03-30 07:02:43 C 06 57 33.058 +47 32 07.84 V T05
2024-03-30 07:12:16 C 06 57 34.020 +47 32 16.73 V T05
2024-03-30 07:33:15 C 06 57 36.053 +47 32 34.84 V T05
2024-03-31 20:41:48 B 07 01 46.50 +48 07 20.9 q Y84
2024-03-31 20:50:11 B 07 01 47.38 +48 07 31.3 q Y84
2024-03-31 20:57:26 B 07 01 48.38 +48 07 40.9 q Y84
2024-04-01 06:53:23 C 07 02 57.941 +48 17 26.45 V T08
2024-04-01 06:58:15 C 07 02 58.481 +48 17 31.31 V T08
2024-04-01 07:05:36 C 07 02 59.254 +48 17 37.54 V T08
2024-04-01 07:22:02 C 07 03 00.977 +48 17 52.12 V T08
2024-04-01 21:36:30 C 07 04 44.438 +48 31 09.84 Z C23
2024-04-01 22:38:43 C 07 04 51.830 +48 32 05.39 Z C23
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)