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
2019-01-30 10:34:37 C 10 07 05.72 +23 50 11.9 U I41
2019-02-03 11:30:57 C 10 14 23.83 +25 57 10.3 V T08
2019-02-03 11:53:34 C 10 14 25.40 +25 57 42.3 V T08
2019-02-03 12:02:12 C 10 14 25.99 +25 57 54.6 V T08
2019-02-03 12:23:15 C 10 14 27.46 +25 58 24.4 V T08
2019-02-05 12:09:56 C 10 18 29.00 +27 09 03.5 V T05
2019-02-05 12:24:14 C 10 18 30.08 +27 09 25.3 V T05
2019-02-05 12:25:33 C 10 18 30.18 +27 09 27.4 V T05
2019-02-05 12:30:15 C 10 18 30.54 +27 09 34.5 V T05
2019-02-06 02:36:49 C 10 19 45.32 +27 31 14.6 q 160
2019-02-06 02:39:37 C 10 19 45.56 +27 31 19.0 q 160
2019-02-06 02:42:35 C 10 19 45.76 +27 31 23.6 q 160
2019-02-07 00:12:53 C 10 21 46.25 +28 05 52.3 d Z35
2019-02-07 00:28:17 C 10 21 47.59 +28 06 16.8 d Z35
2019-02-07 00:43:41 C 10 21 48.91 +28 06 41.3 d Z35
2019-02-07 23:10:26 C 10 23 59.13 +28 43 53.7 d Z35
2019-02-07 23:34:02 C 10 24 01.24 +28 44 34.8 d Z35
2019-02-07 23:53:01 C 10 24 02.99 +28 45 07.4 d Z35
2019-02-08 07:46:56 C 10 24 49.61 +28 58 37.8 V 703
2019-02-08 07:54:31 C 10 24 50.31 +28 58 50.7 V 703
2019-02-08 08:02:07 C 10 24 50.95 +28 59 04.1 V 703
2019-02-08 08:09:42 C 10 24 51.63 +28 59 17.1 V 703
2019-02-09 20:17:12 C 10 28 38.97 +30 02 28.9 q 006
2019-02-09 20:19:12 C 10 28 39.17 +30 02 33.2 q 006
2019-02-09 20:23:12 C 10 28 39.58 +30 02 40.6 q 006
2019-02-09 20:25:12 C 10 28 39.78 +30 02 44.5 q 006
2019-02-09 20:27:12 C 10 28 40.02 +30 02 48.3 q 006
2019-02-09 20:29:12 C 10 28 40.20 +30 02 51.9 q 006
2019-02-09 20:31:12 C 10 28 40.40 +30 02 55.7 q 006
2019-02-12 21:33:12 n 10 37 15.06 +32 21 57.2 V Z43
2019-02-12 21:42:25 n 10 37 16.18 +32 22 15.9 V Z43
2019-02-12 21:52:22 n 10 37 17.39 +32 22 36.7 V Z43
2019-02-12 22:00:18 C 10 37 18.04 +32 22 58.9 15.4 U K83
2019-02-12 22:02:54 n 10 37 18.65 +32 22 57.9 V Z43
2019-02-12 22:03:52 C 10 37 18.45 +32 23 06.3 15.3 U K83
2019-02-12 22:06:04 C 10 37 18.71 +32 23 10.8 15.5 U K83
2019-02-12 22:12:22 n 10 37 19.79 +32 23 17.4 V Z43
2019-02-12 22:22:24 n 10 37 21.01 +32 23 38.2 V Z43
2019-02-13 20:59:31 n 10 40 20.43 +33 09 35.9 V Z43
2019-02-13 21:17:12 n 10 40 22.73 +33 10 13.5 V Z43
2019-02-13 21:24:30 n 10 40 23.68 +33 10 29.1 V Z43
2019-02-13 21:32:02 n 10 40 24.65 +33 10 45.2 V Z43
2019-02-13 21:39:32 n 10 40 25.62 +33 11 01.3 V Z43
2019-02-14 00:19:50 C 10 40 45.37 +33 16 45.0 q 160
2019-02-14 00:22:42 C 10 40 45.76 +33 16 50.9 q 160
2019-02-14 00:25:37 C 10 40 46.09 +33 16 57.3 q 160
2019-02-14 23:43:34 C 10 44 03.48 +34 06 02.6 q 160
2019-02-14 23:46:32 C 10 44 03.79 +34 06 08.9 q 160
2019-02-14 23:49:31 C 10 44 04.26 +34 06 15.4 q 160
2019-02-15 23:44:13 C 10 47 39.11 +34 58 10.2 q 160
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)