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
2019-04-04 02:35:32 C 18 36 16.14 +32 12 58.2 U 089
2019-04-04 05:21:56 S 18 36 45.151 +32 05 02.65 L C51
2019-04-04 08:30:26 S 18 37 22.169 +31 55 53.08 L C51
2019-04-04 11:38:56 S 18 37 58.874 +31 46 45.52 L C51
2019-04-04 14:47:26 S 18 38 35.335 +31 37 39.40 L C51
2019-04-04 17:55:45 S 18 39 11.462 +31 28 34.57 L C51
2019-04-06 01:28:10 C 18 45 03.90 +29 58 27.4 o 069
2019-04-06 01:43:48 C 18 45 06.51 +29 57 44.3 o 069
2019-04-06 01:59:26 C 18 45 09.08 +29 57 01.2 o 069
2019-04-06 02:21:20 C 18 45 12.59 +29 56 12.8 U 089
2019-04-06 02:24:43 C 18 45 13.14 +29 56 02.9 U 089
2019-04-06 02:28:06 C 18 45 13.70 +29 55 54.0 U 089
2019-04-07 02:41:39 C 18 49 25.54 +28 49 03.1 q G40
2019-04-07 02:45:42 C 18 49 26.19 +28 48 52.3 q G40
2019-04-07 02:50:22 C 18 49 26.91 +28 48 40.2 q G40
2019-04-07 02:54:28 C 18 49 27.55 +28 48 29.5 q G40
2019-04-07 03:07:24 C 18 49 29.57 +28 47 55.5 q G40
2019-04-07 03:11:45 C 18 49 30.23 +28 47 44.1 q G40
2019-04-07 03:15:52 C 18 49 30.90 +28 47 33.4 q G40
2019-04-07 03:20:21 C 18 49 31.57 +28 47 21.6 q G40
2019-04-07 03:24:27 C 18 49 32.20 +28 47 10.8 q G40
2019-04-11 16:23:33 S 19 05 27.18 +24 06 35.9 L C51
2019-04-11 19:32:04 S 19 05 51.59 +23 59 00.3 L C51
2019-04-11 22:40:34 S 19 06 15.83 +23 51 25.6 L C51
2019-04-12 01:48:53 S 19 06 39.92 +23 43 52.7 L C51
2019-04-12 04:57:23 S 19 07 03.87 +23 36 21.3 L C51
2019-04-12 11:14:12 S 19 07 51.235 +23 21 23.08 L C51
2019-04-12 17:31:12 S 19 08 37.992 +23 06 31.43 L C51
2019-04-12 20:39:31 S 19 09 01.133 +22 59 07.76 L C51
2019-04-12 23:48:02 S 19 09 24.15 +22 51 46.2 L C51
2019-04-13 01:22:16 S 19 09 35.58 +22 48 06.1 L C51
2019-04-13 06:04:51 S 19 10 09.69 +22 37 06.4 L C51
2019-04-13 07:39:06 S 19 10 20.99 +22 33 27.4 L C51
2019-04-13 09:13:20 S 19 10 32.26 +22 29 49.3 L C51
2019-04-13 10:47:35 S 19 10 43.46 +22 26 11.3 L C51
2019-04-13 13:56:06 S 19 11 05.81 +22 18 56.1 L C51
2019-04-13 15:30:10 S 19 11 16.90 +22 15 18.9 L C51
2019-04-13 17:04:24 S 19 11 27.95 +22 11 42.4 L C51
2019-04-13 18:38:39 S 19 11 39.04 +22 08 06.2 L C51
2019-04-13 20:12:54 S 19 11 50.03 +22 04 30.5 L C51
2019-04-13 21:47:10 S 19 12 00.93 +22 00 57.1 L C51
2019-04-13 23:21:25 S 19 12 11.95 +21 57 19.8 L C51
2019-04-14 00:55:28 S 19 12 22.85 +21 53 45.0 L C51
2019-04-14 02:29:43 S 19 12 33.70 +21 50 10.9 L C51
2019-04-14 05:38:14 S 19 12 55.32 +21 43 03.4 L C51
2019-04-14 07:11:45 S 19 13 06.05 +21 39 28.9 L C51
2019-04-14 08:46:00 S 19 13 16.78 +21 35 56.0 L C51
2019-04-14 11:54:19 S 19 13 38.148 +21 28 50.99 L C51
2019-04-14 15:02:49 S 19 13 59.335 +21 21 48.56 L C51
2019-04-14 21:19:38 S 19 14 41.350 +21 07 46.67 L C51
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)