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
2024-06-01 10:04:54 C 15 15 26.126 +14 03 47.12 V T05
2024-06-01 10:50:15 C 15 15 33.576 +14 00 35.78 V T05
2024-06-02 03:30:41 C 15 18 31.850 +12 52 15.35 V W68
2024-06-02 03:35:15 C 15 18 32.570 +12 51 56.70 V W68
2024-06-02 03:43:10 C 15 18 33.821 +12 51 24.30 V W68
2024-06-02 03:57:30 C 15 18 36.086 +12 50 25.30 V W68
2024-06-02 20:25:01 C 15 21 25.63 +11 42 28.1 X G02
2024-06-02 20:30:52 C 15 21 26.56 +11 42 04.6 X G02
2024-06-02 20:36:44 C 15 21 27.48 +11 41 41.1 X G02
2024-06-02 20:48:25 C 15 21 29.11 +11 40 55.3 M32
2024-06-02 20:50:47 C 15 21 29.48 +11 40 45.8 M32
2024-06-02 20:53:09 C 15 21 29.85 +11 40 36.3 M32
2024-06-02 20:55:33 C 15 21 30.22 +11 40 26.8 M32
2024-06-02 20:57:55 C 15 21 30.60 +11 40 17.3 M32
2024-06-02 21:40:36 B 15 21 38.37 +11 37 26.5 q Y84
2024-06-02 21:44:03 C 15 21 38.926 +11 37 12.79 X Z43
2024-06-02 21:44:50 B 15 21 39.04 +11 37 09.5 q Y84
2024-06-02 21:49:01 B 15 21 39.70 +11 36 52.7 q Y84
2024-06-02 22:19:59 C 15 21 44.532 +11 34 49.22 X Z43
2024-06-02 22:38:01 C 15 21 47.002 +11 33 35.06 Z C23
2024-06-02 22:40:59 C 15 21 47.498 +11 33 23.33 Z C23
2024-06-02 22:43:58 C 15 21 47.945 +11 33 11.84 Z C23
2024-06-03 07:35:44 C 15 23 14.780 +10 58 17.69 V 703
2024-06-03 07:38:57 C 15 23 15.263 +10 58 04.98 V 703
2024-06-03 07:42:10 C 15 23 15.745 +10 57 52.06 V 703
2024-06-03 07:45:23 C 15 23 16.231 +10 57 39.46 V 703
2024-06-03 09:29:50 C 15 23 34.339 +10 51 00.72 V T05
2024-06-03 09:33:51 C 15 23 34.932 +10 50 44.81 V T05
2024-06-03 09:41:40 C 15 23 36.089 +10 50 14.06 V T05
2024-06-03 10:32:29 C 15 23 43.594 +10 46 53.87 V T05
2024-06-03 22:57:36 C 15 25 42.97 +09 58 13.7 V C40
2024-06-03 23:02:09 C 15 25 43.65 +09 57 56.2 V C40
2024-06-03 23:06:37 C 15 25 44.33 +09 57 38.9 V C40
2024-06-03 23:11:05 C 15 25 45.01 +09 57 21.5 V C40
2024-06-03 23:15:29 C 15 25 45.67 +09 57 04.5 V C40
2024-06-03 23:19:51 C 15 25 46.33 +09 56 47.7 V C40
2024-06-03 23:24:12 C 15 25 46.99 +09 56 30.8 V C40
2024-06-03 23:28:28 C 15 25 47.63 +09 56 14.2 V C40
2024-06-03 23:32:46 C 15 25 48.28 +09 55 57.6 V C40
2024-06-03 23:37:05 C 15 25 48.93 +09 55 40.9 V C40
2024-06-03 23:41:22 C 15 25 49.58 +09 55 24.2 V C40
2024-06-03 23:45:40 C 15 25 50.23 +09 55 07.7 V C40
2024-06-04 03:45:15 C 15 26 30.38 +09 39 56.2 V W53
2024-06-04 04:01:27 C 15 26 32.71 +09 38 54.3 V W53
2024-06-04 04:12:12 C 15 26 34.26 +09 38 13.2 V W53
2024-06-04 06:43:46 C 15 26 56.32 +09 28 33.4 V W53
2024-06-04 06:54:32 C 15 26 57.90 +09 27 52.1 V W53
2024-06-04 07:06:04 C 15 26 59.62 +09 27 07.9 V W53
2024-06-04 07:44:34 C 15 27 06.437 +09 24 49.39 V G96
2024-06-04 07:52:10 C 15 27 07.528 +09 24 20.41 V G96
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)