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
2024-05-09 23:09:33 C 12 11 35.04 +52 51 56.9 M32
2024-05-09 23:10:33 C 12 11 37.202 +52 52 01.06 V Z80
2024-05-09 23:10:52 C 12 11 35.73 +52 51 53.6 M32
2024-05-09 23:17:13 C 12 11 40.591 +52 51 43.20 V Z80
2024-05-10 23:14:38 C 12 24 11.00 +51 46 40.2 V D48
2024-05-10 23:43:28 C 12 24 25.42 +51 45 14.6 V D48
2024-05-11 00:00:47 C 12 24 34.10 +51 44 23.1 V D48
2024-05-11 07:24:26 C 12 28 21.547 +51 23 11.33 V 703
2024-05-11 07:27:49 C 12 28 23.192 +51 23 00.85 V 703
2024-05-11 07:31:13 C 12 28 24.866 +51 22 50.41 V 703
2024-05-11 07:34:37 C 12 28 26.540 +51 22 39.86 V 703
2024-05-11 22:29:27 C 12 36 02.77 +50 37 03.0 V D48
2024-05-11 22:46:45 C 12 36 11.14 +50 36 07.5 V D48
2024-05-11 23:04:05 C 12 36 19.53 +50 35 11.7 V D48
2024-05-12 00:03:10 C 12 36 47.92 +50 31 55.5 Y 557
2024-05-12 00:17:49 C 12 36 55.11 +50 31 07.4 Y 557
2024-05-12 00:32:30 C 12 37 02.32 +50 30 19.2 Y 557
2024-05-12 21:37:29 C 12 47 29.79 +49 21 29.6 M32
2024-05-12 21:39:22 C 12 47 30.68 +49 21 22.9 M32
2024-05-12 21:41:15 C 12 47 31.55 +49 21 16.6 M32
2024-05-12 21:43:09 C 12 47 32.44 +49 21 10.0 M32
2024-05-12 21:45:02 C 12 47 33.33 +49 21 03.5 M32
2024-05-13 01:07:09 C 12 49 09.40 +49 09 12.3 Y 557
2024-05-13 01:14:30 C 12 49 12.92 +49 08 46.0 Y 557
2024-05-13 01:21:50 C 12 49 16.42 +49 08 19.7 Y 557
2024-05-13 06:57:17 C 12 51 59.555 +48 49 35.58 V 703
2024-05-13 07:00:38 C 12 52 01.121 +48 49 22.98 V 703
2024-05-13 07:04:00 C 12 52 02.644 +48 49 11.24 V 703
2024-05-13 07:07:20 C 12 52 04.184 +48 48 59.22 V 703
2024-05-13 08:19:55 C 12 52 41.652 +48 45 05.62 V T05
2024-05-13 08:24:29 C 12 52 43.716 +48 44 49.56 V T05
2024-05-13 08:34:17 C 12 52 48.118 +48 44 14.64 V T05
2024-05-13 08:38:13 C 12 52 49.898 +48 44 00.56 V T05
2024-05-13 08:42:48 C 12 52 51.965 +48 43 44.29 V T05
2024-05-13 08:50:39 C 12 52 55.500 +48 43 16.36 V T05
2024-05-13 08:51:18 C 12 52 55.798 +48 43 13.98 V T05
2024-05-13 09:41:21 C 12 53 18.391 +48 40 13.73 V T05
2024-05-13 21:41:16 C 12 59 01.43 +47 56 36.1 Y 557
2024-05-13 21:45:27 C 12 59 03.34 +47 56 20.4 Y 557
2024-05-13 21:51:19 C 12 59 05.96 +47 55 58.9 Y 557
2024-05-13 22:03:44 C 12 59 10.91 +47 55 12.1 M32
2024-05-13 22:05:13 C 12 59 11.60 +47 55 06.4 M32
2024-05-13 22:06:42 C 12 59 12.26 +47 55 01.2 M32
2024-05-13 22:08:12 C 12 59 12.94 +47 54 55.5 M32
2024-05-13 22:09:41 C 12 59 13.60 +47 54 49.8 M32
2024-05-13 22:11:10 C 12 59 14.27 +47 54 44.3 M32
2024-05-13 22:12:21 C 12 59 14.80 +47 54 39.8 M32
2024-05-13 23:04:32 C 12 59 39.715 +47 51 26.75 Z C23
2024-05-13 23:06:16 C 12 59 40.30 +47 51 21.8 V D48
2024-05-13 23:08:17 C 12 59 41.441 +47 51 12.85 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)