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
2024-04-16 22:20:01 C 08 10 11.270 +54 30 07.20 Z C23
2024-04-16 22:23:47 C 08 10 12.218 +54 30 10.66 Z C23
2024-04-17 03:52:19 C 08 11 38.483 +54 35 51.40 V 703
2024-04-17 03:55:44 C 08 11 39.289 +54 35 54.74 V 703
2024-04-17 03:59:08 C 08 11 40.106 +54 35 57.66 V 703
2024-04-17 04:02:33 C 08 11 41.017 +54 36 00.61 V 703
2024-04-17 22:03:35 C 08 16 29.714 +54 52 50.88 Z C23
2024-04-17 22:05:45 C 08 16 30.271 +54 52 52.32 Z C23
2024-04-17 22:08:59 C 08 16 31.188 +54 52 55.70 Z C23
2024-04-18 04:19:13 C 08 18 12.845 +54 59 04.92 V 703
2024-04-18 04:22:36 C 08 18 13.774 +54 59 08.05 V 703
2024-04-18 04:25:59 C 08 18 14.663 +54 59 10.57 V 703
2024-04-18 04:29:22 C 08 18 15.491 +54 59 13.88 V 703
2024-04-19 06:11:31 C 08 25 35.289 +55 23 13.11 X F52
2024-04-19 06:27:49 C 08 25 39.696 +55 23 27.03 X F52
2024-04-19 06:44:02 C 08 25 44.088 +55 23 40.63 X F52
2024-04-19 07:00:13 C 08 25 48.491 +55 23 54.07 X F52
2024-04-19 07:12:13 C 08 25 51.763 +55 24 04.25 V T05
2024-04-19 07:16:29 C 08 25 52.932 +55 24 07.20 V T05
2024-04-19 07:44:24 C 08 26 00.583 +55 24 29.92 V T05
2024-04-20 05:31:08 C 08 32 32.503 +55 43 39.40 V 703
2024-04-20 05:34:30 C 08 32 33.637 +55 43 42.46 V 703
2024-04-20 05:37:51 C 08 32 34.552 +55 43 43.93 V 703
2024-04-20 05:41:12 C 08 32 35.502 +55 43 47.39 V 703
2024-04-21 06:28:20 C 08 40 24.258 +56 04 42.24 V 703
2024-04-21 06:31:50 C 08 40 25.489 +56 04 46.81 V 703
2024-04-21 06:35:21 C 08 40 26.980 +56 04 52.21 V 703
2024-04-21 06:38:51 C 08 40 28.319 +56 04 55.56 V 703
2024-04-21 20:30:45 C 08 45 05.256 +56 16 12.83 V J95
2024-04-21 20:33:14 C 08 45 06.036 +56 16 14.63 V J95
2024-04-21 20:35:47 C 08 45 06.869 +56 16 16.54 V J95
2024-04-21 20:38:20 C 08 45 07.687 +56 16 18.37 V J95
2024-04-21 21:17:40 C 08 45 20.081 +56 16 46.13 Z C23
2024-04-21 21:21:57 C 08 45 21.478 +56 16 49.26 Z C23
2024-04-21 21:25:11 C 08 45 22.433 +56 16 51.49 Z C23
2024-04-22 06:25:56 C 08 48 23.245 +56 23 58.81 V 703
2024-04-22 06:29:11 C 08 48 24.242 +56 23 59.68 V 703
2024-04-22 06:35:40 C 08 48 26.528 +56 24 05.15 V 703
2024-04-22 21:44:53 C 08 53 43.985 +56 35 27.53 Z C23
2024-04-22 21:49:12 C 08 53 45.485 +56 35 30.34 Z C23
2024-04-22 21:53:30 C 08 53 46.999 +56 35 32.93 Z C23
2024-04-24 21:53:03 C 09 11 35.141 +57 07 20.64 V Z80
2024-04-24 21:57:27 C 09 11 36.840 +57 07 23.12 V Z80
2024-04-24 23:20:24 C 09 12 08.309 +57 08 03.12 V Z80
2024-04-26 05:45:19 C 09 24 22.223 +57 24 03.46 V 703
2024-04-26 05:48:48 C 09 24 23.576 +57 24 04.86 V 703
2024-04-26 05:52:16 C 09 24 24.962 +57 24 05.58 V 703
2024-04-26 05:55:45 C 09 24 26.377 +57 24 06.62 V 703
2024-04-27 07:02:39 C 09 35 08.302 +57 34 16.75 V T05
2024-04-27 07:17:36 C 09 35 14.424 +57 34 20.71 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)