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
2024-05-13 23:12:00 C 12 59 43.109 +47 50 58.74 Z C23
2024-05-13 23:23:35 C 12 59 48.11 +47 50 16.9 V D48
2024-05-13 23:40:54 C 12 59 55.94 +47 49 11.7 V D48
2024-05-14 01:06:48 C 13 00 34.78 +47 43 40.9 Y 557
2024-05-14 01:17:17 C 13 00 39.59 +47 43 00.7 Y 557
2024-05-14 01:29:52 C 13 00 45.38 +47 42 12.6 Y 557
2024-05-15 06:33:01 C 13 14 01.554 +45 51 20.20 V 703
2024-05-15 06:36:21 C 13 14 02.969 +45 51 06.66 V 703
2024-05-15 06:39:40 C 13 14 04.355 +45 50 53.20 V 703
2024-05-15 06:43:00 C 13 14 05.780 +45 50 39.70 V 703
2024-05-15 20:55:44 C 13 20 21.01 +44 52 51.7 M32
2024-05-15 20:57:32 C 13 20 21.76 +44 52 44.3 M32
2024-05-15 20:59:20 C 13 20 22.50 +44 52 36.8 M32
2024-05-15 21:01:09 C 13 20 23.25 +44 52 29.3 M32
2024-05-15 21:02:57 C 13 20 24.00 +44 52 21.8 M32
2024-05-16 01:15:56 C 13 22 09.86 +44 34 35.9 Y 557
2024-05-16 01:20:09 C 13 22 11.63 +44 34 18.0 Y 557
2024-05-16 01:26:25 C 13 22 14.29 +44 33 51.0 Y 557
2024-05-16 22:01:42 B 13 30 55.29 +43 06 55.5 X L99
2024-05-16 22:03:06 B 13 30 55.82 +43 06 49.3 X L99
2024-05-16 22:04:30 B 13 30 56.43 +43 06 43.9 X L99
2024-05-16 22:05:54 B 13 30 56.92 +43 06 37.8 X L99
2024-05-16 22:07:17 B 13 30 57.50 +43 06 30.8 X L99
2024-05-16 22:52:39 C 13 31 15.84 +43 03 16.1 M32
2024-05-16 22:54:08 C 13 31 16.45 +43 03 09.8 M32
2024-05-16 22:55:38 C 13 31 17.02 +43 03 03.3 M32
2024-05-16 22:57:07 C 13 31 17.61 +43 02 56.4 M32
2024-05-16 22:58:36 C 13 31 18.20 +43 02 50.2 M32
2024-05-16 23:00:06 C 13 31 18.81 +43 02 43.4 M32
2024-05-16 23:01:18 C 13 31 19.27 +43 02 38.1 M32
2024-05-18 05:54:34 C 13 43 39.695 +40 46 08.33 V 703
2024-05-18 05:57:53 C 13 43 40.908 +40 45 53.03 V 703
2024-05-18 06:01:15 C 13 43 42.118 +40 45 37.66 V 703
2024-05-18 06:04:35 C 13 43 43.309 +40 45 22.10 V 703
2024-05-18 20:45:54 C 13 49 18.71 +39 37 45.3 M32
2024-05-18 20:47:42 C 13 49 19.35 +39 37 37.0 M32
2024-05-18 20:49:30 C 13 49 20.00 +39 37 28.6 M32
2024-05-18 20:51:18 C 13 49 20.64 +39 37 20.3 M32
2024-05-18 20:53:06 C 13 49 21.28 +39 37 12.0 M32
2024-05-18 20:54:11 C 13 49 21.96 +39 37 06.1 X G02
2024-05-18 20:59:46 C 13 49 23.91 +39 36 40.1 X G02
2024-05-18 21:05:21 C 13 49 25.94 +39 36 14.1 X G02
2024-05-19 07:31:53 C 13 53 14.960 +38 47 55.54 V 703
2024-05-19 07:35:11 C 13 53 16.094 +38 47 39.77 V 703
2024-05-19 07:38:29 C 13 53 17.228 +38 47 23.89 V 703
2024-05-19 07:41:46 C 13 53 18.373 +38 47 08.41 V 703
2024-05-19 20:30:52 C 13 57 58.48 +37 46 31.6 X G02
2024-05-19 20:35:53 C 13 58 00.19 +37 46 07.6 X G02
2024-05-19 20:40:55 C 13 58 01.89 +37 45 43.8 X G02
2024-05-19 21:56:13 C 13 58 27.57 +37 39 45.4 Y 557
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)