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
2024-05-05 05:58:11 C 11 10 17.047 +56 26 03.80 V 703
2024-05-05 06:01:36 C 11 10 18.854 +56 25 58.91 V 703
2024-05-05 06:05:02 C 11 10 20.708 +56 25 54.59 V 703
2024-05-05 06:08:27 C 11 10 22.498 +56 25 50.66 V 703
2024-05-06 03:48:10 C 11 22 14.585 +55 56 42.54 V G96
2024-05-06 03:56:27 C 11 22 18.880 +55 56 30.19 V G96
2024-05-06 04:04:43 C 11 22 23.160 +55 56 17.92 V G96
2024-05-06 04:13:01 C 11 22 27.451 +55 56 05.53 V G96
2024-05-07 07:10:58 C 11 37 06.776 +55 11 44.84 V 703
2024-05-07 07:14:23 C 11 37 08.548 +55 11 37.68 V 703
2024-05-07 07:17:48 C 11 37 10.362 +55 11 31.49 V 703
2024-05-07 07:21:13 C 11 37 12.191 +55 11 25.01 V 703
2024-05-07 22:03:02 C 11 45 15.643 +54 43 35.40 Z C23
2024-05-07 22:06:16 C 11 45 17.359 +54 43 28.81 Z C23
2024-05-07 22:09:31 C 11 45 19.166 +54 43 23.48 Z C23
2024-05-08 21:04:16 C 11 57 43.43 +53 54 59.0 q M07
2024-05-08 22:08:43 C 11 58 16.89 +53 52 29.8 q M07
2024-05-08 22:48:38 C 11 58 36.89 +53 50 58.1 V M34
2024-05-08 23:05:34 C 11 58 46.937 +53 50 19.07 Z C23
2024-05-08 23:07:35 C 11 58 46.79 +53 50 12.9 V M34
2024-05-08 23:09:53 C 11 58 49.042 +53 50 09.35 Z C23
2024-05-08 23:14:10 C 11 58 51.497 +53 49 58.01 Z C23
2024-05-08 23:31:42 C 11 58 59.46 +53 49 14.5 V M34
2024-05-08 23:40:36 C 11 59 04.88 +53 48 52.0 q M07
2024-05-09 05:49:24 C 12 02 23.615 +53 35 10.28 V 703
2024-05-09 05:52:54 C 12 02 25.447 +53 35 01.75 V 703
2024-05-09 05:56:24 C 12 02 27.215 +53 34 53.15 V 703
2024-05-09 05:59:54 C 12 02 28.997 +53 34 44.72 V 703
2024-05-09 08:09:02 C 12 03 39.295 +53 29 54.13 V T05
2024-05-09 08:16:32 C 12 03 43.078 +53 29 35.77 V T05
2024-05-09 08:21:06 C 12 03 45.377 +53 29 24.65 V T05
2024-05-09 08:36:20 C 12 03 53.054 +53 28 47.10 V T05
2024-05-09 19:27:14 B 12 09 40.11 +53 01 39.2 X L76
2024-05-09 19:29:17 B 12 09 41.15 +53 01 33.8 X L76
2024-05-09 19:31:20 B 12 09 42.19 +53 01 28.6 X L76
2024-05-09 19:33:23 B 12 09 43.22 +53 01 23.4 X L76
2024-05-09 19:35:26 B 12 09 44.28 +53 01 17.9 X L76
2024-05-09 19:37:29 B 12 09 45.30 +53 01 12.7 X L76
2024-05-09 19:39:32 B 12 09 46.35 +53 01 07.5 X L76
2024-05-09 19:41:34 B 12 09 47.38 +53 01 02.1 X L76
2024-05-09 19:43:37 B 12 09 48.43 +53 00 56.8 X L76
2024-05-09 22:30:43 C 12 11 16.668 +52 53 43.66 Z C23
2024-05-09 22:35:02 C 12 11 18.838 +52 53 32.14 Z C23
2024-05-09 22:38:15 C 12 11 20.518 +52 53 23.57 Z C23
2024-05-09 23:01:15 C 12 11 30.78 +52 52 19.4 M32
2024-05-09 23:02:55 C 12 11 31.60 +52 52 15.0 M32
2024-05-09 23:03:57 C 12 11 33.799 +52 52 18.44 V Z80
2024-05-09 23:04:35 C 12 11 32.47 +52 52 10.6 M32
2024-05-09 23:06:13 C 12 11 33.35 +52 52 06.0 M32
2024-05-09 23:07:54 C 12 11 34.16 +52 52 01.6 M32
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)