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
2024-04-27 07:21:37 C 09 35 16.073 +57 34 21.68 V T05
2024-04-27 07:29:59 C 09 35 19.488 +57 34 23.59 V T05
2024-04-28 22:59:04 C 09 53 05.174 +57 42 15.59 Z C23
2024-04-28 23:01:13 C 09 53 06.163 +57 42 15.26 Z C23
2024-04-28 23:04:26 C 09 53 07.622 +57 42 15.34 Z C23
2024-04-29 05:50:20 C 09 56 16.796 +57 43 06.28 V 703
2024-04-29 05:53:48 C 09 56 18.348 +57 43 06.24 V 703
2024-04-29 05:57:16 C 09 56 19.925 +57 43 05.99 V 703
2024-04-29 06:00:44 C 09 56 21.512 +57 43 05.59 V 703
2024-04-29 20:43:24 C 10 03 22.67 +57 42 57.1 M32
2024-04-29 20:45:38 C 10 03 23.75 +57 42 55.8 M32
2024-04-29 20:47:53 C 10 03 24.76 +57 42 56.1 M32
2024-04-29 20:50:07 C 10 03 25.83 +57 42 55.1 M32
2024-04-29 20:52:21 C 10 03 26.88 +57 42 55.8 M32
2024-04-29 20:54:35 C 10 03 27.90 +57 42 54.7 M32
2024-04-29 22:23:35 C 10 04 11.047 +57 42 47.59 V Z80
2024-04-29 22:30:12 C 10 04 14.100 +57 42 46.66 V Z80
2024-04-29 22:36:47 C 10 04 17.186 +57 42 45.72 V Z80
2024-04-30 20:26:01 C 10 14 58.70 +57 39 44.4 M32
2024-04-30 20:29:09 C 10 15 00.34 +57 39 42.7 M32
2024-04-30 20:32:17 C 10 15 01.77 +57 39 41.8 M32
2024-04-30 20:35:25 C 10 15 03.29 +57 39 40.6 M32
2024-04-30 20:35:52 C 10 15 03.51 +57 39 40.5 M32
2024-04-30 20:39:00 C 10 15 05.05 +57 39 39.2 M32
2024-04-30 20:45:09 B 10 15 07.67 +57 39 32.8 X L99
2024-04-30 20:48:06 B 10 15 09.10 +57 39 32.5 X L99
2024-04-30 20:51:03 B 10 15 10.47 +57 39 31.0 X L99
2024-04-30 20:54:00 B 10 15 11.92 +57 39 28.9 X L99
2024-04-30 20:56:57 B 10 15 13.32 +57 39 28.0 X L99
2024-05-01 05:49:19 C 10 19 39.018 +57 37 26.11 V 703
2024-05-01 05:52:41 C 10 19 40.660 +57 37 24.85 V 703
2024-05-01 05:56:03 C 10 19 42.287 +57 37 23.23 V 703
2024-05-01 05:59:25 C 10 19 43.907 +57 37 21.83 V 703
2024-05-01 07:00:48 C 10 20 17.582 +57 37 24.31 V T05
2024-05-01 07:06:02 C 10 20 20.059 +57 37 22.26 V T05
2024-05-01 07:15:13 C 10 20 24.418 +57 37 18.88 V T05
2024-05-01 07:36:49 C 10 20 34.663 +57 37 10.56 V T05
2024-05-01 22:33:22 B 10 28 08.60 +57 30 43.1 X L99
2024-05-01 22:36:13 B 10 28 09.99 +57 30 39.9 X L99
2024-05-01 22:39:04 B 10 28 11.47 +57 30 38.5 X L99
2024-05-01 22:41:55 B 10 28 12.93 +57 30 36.8 X L99
2024-05-01 22:44:46 B 10 28 14.37 +57 30 35.1 X L99
2024-05-02 21:28:54 B 10 40 04.45 +57 18 25.1 q M07
2024-05-02 22:35:43 B 10 40 38.32 +57 17 35.9 q M07
2024-05-03 22:42:02 C 10 53 25.546 +56 58 53.36 Z C23
2024-05-03 22:45:15 C 10 53 27.250 +56 58 50.16 Z C23
2024-05-03 22:48:30 C 10 53 28.927 +56 58 46.60 Z C23
2024-05-04 22:33:26 B 11 06 15.07 +56 34 21.4 X L99
2024-05-04 22:37:41 B 11 06 17.39 +56 34 15.0 X L99
2024-05-04 22:41:56 B 11 06 19.63 +56 34 10.0 X L99
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)