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
2024-05-24 21:55:28 C 14 35 38.23 +27 54 23.0 M32
2024-05-24 21:56:57 C 14 35 38.61 +27 54 15.6 M32
2024-05-24 21:58:08 C 14 35 38.92 +27 54 09.8 M32
2024-05-25 09:17:29 C 14 38 39.713 +26 59 20.33 V T08
2024-05-25 09:23:18 C 14 38 41.124 +26 58 51.74 V T08
2024-05-25 09:31:16 C 14 38 43.042 +26 58 12.50 V T08
2024-05-25 09:47:23 C 14 38 46.932 +26 56 53.48 V T08
2024-05-25 21:39:28 B 14 41 51.11 +25 58 27.3 X L99
2024-05-25 21:41:28 B 14 41 51.52 +25 58 17.1 X L99
2024-05-25 21:43:08 B 14 41 51.96 +25 58 09.4 X L99
2024-05-25 21:44:28 B 14 41 52.32 +25 58 02.5 X L99
2024-05-25 21:45:48 B 14 41 52.66 +25 57 57.0 X L99
2024-05-25 22:45:12 C 14 42 07.33 +25 53 09.5 M32
2024-05-25 22:46:28 C 14 42 07.61 +25 53 03.3 M32
2024-05-25 22:47:43 C 14 42 07.93 +25 52 57.1 M32
2024-05-25 22:48:59 C 14 42 08.24 +25 52 51.2 M32
2024-05-25 22:50:14 C 14 42 08.53 +25 52 45.2 M32
2024-05-25 22:51:29 C 14 42 08.80 +25 52 38.7 M32
2024-05-25 22:52:45 C 14 42 09.13 +25 52 32.9 M32
2024-05-25 22:54:00 C 14 42 09.43 +25 52 26.5 M32
2024-05-25 23:36:34 C 14 42 19.266 +25 48 57.02 V 089
2024-05-25 23:46:35 C 14 42 21.671 +25 48 07.38 V 089
2024-05-26 00:04:36 C 14 42 26.108 +25 46 39.11 V 089
2024-05-26 00:24:37 C 14 42 31.005 +25 45 00.68 V 089
2024-05-26 07:45:48 C 14 44 22.816 +25 09 46.98 V 703
2024-05-26 07:49:03 C 14 44 23.575 +25 09 31.10 V 703
2024-05-26 07:52:18 C 14 44 24.338 +25 09 15.05 V 703
2024-05-26 07:55:34 C 14 44 25.105 +25 08 59.39 V 703
2024-05-26 19:32:12 C 14 47 19.75 +24 12 44.7 X G02
2024-05-26 19:37:41 C 14 47 21.03 +24 12 18.5 X G02
2024-05-26 19:42:58 C 14 47 22.24 +24 11 53.2 X G02
2024-05-26 21:26:56 C 14 47 45.71 +24 03 36.2 M32
2024-05-26 21:29:29 C 14 47 46.29 +24 03 23.9 M32
2024-05-26 21:31:04 C 14 47 46.66 +24 03 16.2 M32
2024-05-26 21:32:39 C 14 47 47.02 +24 03 08.7 M32
2024-05-26 21:34:14 C 14 47 47.37 +24 03 01.2 M32
2024-05-26 21:35:50 C 14 47 47.74 +24 02 53.5 M32
2024-05-26 22:08:43 C 14 47 55.68 +24 00 14.1 Y 557
2024-05-26 22:23:23 C 14 47 59.00 +23 59 03.5 Y 557
2024-05-26 22:41:12 C 14 48 03.06 +23 57 37.8 Y 557
2024-05-27 09:13:37 C 14 50 34.006 +23 07 50.48 V T05
2024-05-27 09:23:32 C 14 50 36.142 +23 07 03.14 V T05
2024-05-27 09:28:06 C 14 50 37.123 +23 06 41.36 V T05
2024-05-27 09:43:02 C 14 50 40.342 +23 05 29.90 V T05
2024-05-27 19:52:55 C 14 53 03.84 +22 16 46.2 X G02
2024-05-27 19:58:29 C 14 53 05.06 +22 16 19.8 X G02
2024-05-27 20:04:04 C 14 53 06.26 +22 15 53.6 X G02
2024-05-28 09:29:04 C 14 56 06.396 +21 13 24.92 V T05
2024-05-28 09:33:37 C 14 56 07.318 +21 13 03.50 V T05
2024-05-28 09:41:13 C 14 56 08.868 +21 12 27.94 V T05
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)