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
2024-06-04 07:59:42 C 15 27 08.618 +09 23 51.65 V G96
2024-06-04 08:07:15 C 15 27 09.702 +09 23 22.96 V G96
2024-06-04 21:00:44 C 15 29 10.97 +08 34 40.8 Y 557
2024-06-04 21:07:39 C 15 29 11.95 +08 34 15.1 Y 557
2024-06-04 21:47:09 C 15 29 17.36 +08 31 48.7 X G02
2024-06-04 21:52:43 C 15 29 18.15 +08 31 27.9 X G02
2024-06-04 21:58:01 C 15 29 18.90 +08 31 08.2 X G02
2024-06-04 23:48:35 C 15 29 33.84 +08 24 18.7 V C40
2024-06-04 23:53:05 C 15 29 34.51 +08 24 01.9 V C40
2024-06-04 23:57:27 C 15 29 35.14 +08 23 45.7 V C40
2024-06-05 00:01:44 C 15 29 35.76 +08 23 29.7 V C40
2024-06-05 00:06:01 C 15 29 36.38 +08 23 13.8 V C40
2024-06-05 00:10:18 C 15 29 37.00 +08 22 57.8 V C40
2024-06-05 00:52:24 C 15 29 43.90 +08 20 19.3 Y 557
2024-06-05 01:03:27 C 15 29 45.49 +08 19 38.3 Y 557
2024-06-05 09:26:44 C 15 31 02.316 +07 49 16.36 V T08
2024-06-05 09:34:19 C 15 31 03.329 +07 48 48.56 V T08
2024-06-05 09:38:58 C 15 31 03.950 +07 48 31.61 V T08
2024-06-05 09:58:25 C 15 31 06.550 +07 47 20.47 V T08
2024-06-05 21:02:08 B 15 32 45.545 +07 07 00.05 V 160
2024-06-05 21:04:58 B 15 32 45.895 +07 06 50.11 V 160
2024-06-05 21:25:51 C 15 32 48.66 +07 05 35.2 V G17
2024-06-05 21:31:34 C 15 32 49.43 +07 05 15.0 V G17
2024-06-05 21:37:16 C 15 32 50.19 +07 04 54.6 V G17
2024-06-05 22:01:51 C 15 32 52.185 +07 03 36.89 W M01
2024-06-05 22:04:21 C 15 32 52.519 +07 03 27.88 W M01
2024-06-05 22:06:51 C 15 32 52.852 +07 03 18.86 W M01
2024-06-05 22:36:14 C 15 32 56.97 +07 01 21.4 V C40
2024-06-05 22:39:57 C 15 32 57.48 +07 01 08.2 V C40
2024-06-05 22:43:40 C 15 32 57.98 +07 00 54.8 V C40
2024-06-05 22:47:24 C 15 32 58.50 +07 00 41.4 V C40
2024-06-05 22:51:08 C 15 32 59.00 +07 00 28.0 V C40
2024-06-05 22:54:52 C 15 32 59.52 +07 00 14.7 V C40
2024-06-05 22:58:36 C 15 33 00.02 +07 00 01.4 V C40
2024-06-05 23:01:59 C 15 33 01.14 +06 59 47.4 M32
2024-06-05 23:02:20 C 15 33 00.54 +06 59 47.9 V C40
2024-06-05 23:04:36 C 15 33 01.49 +06 59 38.1 M32
2024-06-05 23:06:04 C 15 33 01.05 +06 59 34.6 V C40
2024-06-05 23:07:11 C 15 33 01.85 +06 59 28.8 M32
2024-06-05 23:08:48 C 15 33 01.142 +06 59 36.75 W M01
2024-06-05 23:09:48 C 15 33 02.20 +06 59 19.5 M32
2024-06-05 23:11:18 C 15 33 01.482 +06 59 27.84 W M01
2024-06-05 23:12:23 C 15 33 02.56 +06 59 10.2 M32
2024-06-05 23:13:48 C 15 33 01.821 +06 59 18.92 W M01
2024-06-06 20:29:53 C 15 36 05.11 +05 44 42.7 V 088
2024-06-06 20:33:07 C 15 36 05.50 +05 44 31.6 V 088
2024-06-06 20:36:51 C 15 36 06.04 +05 44 17.8 V 088
2024-06-06 21:27:00 C 15 36 12.84 +05 41 11.4 M32
2024-06-06 21:29:41 C 15 36 13.21 +05 41 02.1 M32
2024-06-06 21:32:49 C 15 36 13.60 +05 40 51.3 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)