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
2024-04-05 03:25:15 C 07 15 03.978 +49 47 16.73 V 703
2024-04-05 03:28:39 C 07 15 04.414 +49 47 19.68 V 703
2024-04-05 03:32:03 C 07 15 04.921 +49 47 23.03 V 703
2024-04-05 03:35:26 C 07 15 05.292 +49 47 25.76 V 703
2024-04-06 07:19:17 C 07 19 09.883 +50 15 00.14 V T08
2024-04-06 07:25:16 C 07 19 10.718 +50 15 05.44 V T08
2024-04-06 07:43:35 C 07 19 13.250 +50 15 22.07 V T08
2024-04-06 07:45:42 C 07 19 13.546 +50 15 24.05 V T08
2024-04-06 08:04:03 C 07 19 16.118 +50 15 40.57 V T08
2024-04-06 08:06:09 C 07 19 16.416 +50 15 42.19 V T08
2024-04-06 19:02:15 B 07 20 59.126 +50 26 29.26 q L47
2024-04-06 19:13:37 B 07 21 00.768 +50 26 40.78 q L47
2024-04-06 19:25:01 B 07 21 02.417 +50 26 51.11 q L47
2024-04-08 04:00:29 C 07 26 16.307 +50 59 36.78 V 703
2024-04-08 04:03:47 C 07 26 16.818 +50 59 39.77 V 703
2024-04-08 04:07:05 C 07 26 17.192 +50 59 42.54 V 703
2024-04-08 04:10:22 C 07 26 17.797 +50 59 45.46 V 703
2024-04-09 07:00:58 C 07 30 53.054 +51 26 56.87 V T08
2024-04-09 07:19:10 C 07 30 55.961 +51 27 13.61 V T08
2024-04-09 07:37:23 C 07 30 58.968 +51 27 30.24 V T08
2024-04-10 20:14:29 C 07 37 42.221 +52 04 15.96 Z C23
2024-04-10 20:24:23 C 07 37 44.002 +52 04 25.46 Z C23
2024-04-10 20:49:55 B 07 37 48.17 +52 04 50.8 X M59
2024-04-10 20:55:58 B 07 37 49.46 +52 04 57.3 X M59
2024-04-10 21:02:01 B 07 37 50.70 +52 05 03.2 X M59
2024-04-11 04:05:19 C 07 39 11.549 +52 12 23.87 V 703
2024-04-11 04:08:38 C 07 39 12.186 +52 12 28.55 V 703
2024-04-11 04:11:55 C 07 39 12.856 +52 12 31.93 V 703
2024-04-11 04:15:13 C 07 39 13.421 +52 12 34.42 V 703
2024-04-11 14:17:38 B 07 41 10.52 +52 22 52.0 Z O41
2024-04-11 14:28:19 B 07 41 12.56 +52 23 01.9 Z O41
2024-04-11 14:39:02 B 07 41 14.47 +52 23 11.7 Z O41
2024-04-13 03:48:51 C 07 48 53.338 +53 00 41.51 V 703
2024-04-13 03:52:16 C 07 48 53.968 +53 00 44.78 V 703
2024-04-13 03:55:41 C 07 48 54.716 +53 00 48.78 V 703
2024-04-13 03:59:06 C 07 48 55.310 +53 00 51.62 V 703
2024-04-13 19:50:42 C 07 52 22.997 +53 16 38.53 Z C23
2024-04-13 19:55:00 C 07 52 23.873 +53 16 42.38 Z C23
2024-04-13 19:59:19 C 07 52 24.770 +53 16 46.67 Z C23
2024-04-13 23:40:31 B 07 53 11.587 +53 20 15.72 X L43
2024-04-14 00:19:04 B 07 53 20.134 +53 20 50.14 X L43
2024-04-14 01:00:04 B 07 53 29.311 +53 21 26.17 X L43
2024-04-14 22:11:42 C 07 58 20.741 +53 42 51.05 V Z80
2024-04-14 22:18:19 C 07 58 22.241 +53 42 56.99 V Z80
2024-04-14 22:24:59 C 07 58 23.806 +53 43 03.76 V Z80
2024-04-15 03:48:46 C 07 59 40.452 +53 48 47.45 V 703
2024-04-15 03:51:56 C 07 59 41.140 +53 48 50.29 V 703
2024-04-15 03:55:07 C 07 59 41.867 +53 48 53.50 V 703
2024-04-15 03:58:17 C 07 59 42.536 +53 48 56.23 V 703
2024-04-16 22:16:14 C 08 10 10.330 +54 30 04.07 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)