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
2024-06-23 22:26:43 C 16 18 35.318 -10 59 52.26 Z C23
2024-06-24 21:03:00 C 16 20 23.29 -11 36 28.6 X G02
2024-06-24 21:09:43 C 16 20 23.77 -11 36 39.2 X G02
2024-06-24 21:16:25 C 16 20 24.26 -11 36 48.5 X G02
2024-06-25 09:18:30 C 16 21 20.508 -11 55 32.23 V T08
2024-06-25 09:23:22 C 16 21 20.849 -11 55 39.76 V T08
2024-06-25 09:39:48 C 16 21 21.986 -11 56 04.99 V T08
2024-06-25 09:50:08 C 16 21 22.706 -11 56 20.98 V T08
2024-06-25 22:11:08 C 16 22 20.681 -12 15 31.18 Z C23
2024-06-25 22:15:27 C 16 22 21.002 -12 15 37.48 Z C23
2024-06-25 22:26:23 C 16 22 21.775 -12 15 53.86 Z C23
2024-06-27 22:06:18 C 16 25 57.914 -13 24 39.85 V M22
2024-06-27 22:11:43 C 16 25 58.282 -13 24 47.38 V M22
2024-06-27 22:23:15 C 16 25 59.076 -13 25 03.29 V M22
2024-06-27 22:44:17 C 16 26 00.468 -13 25 32.45 V M22
2024-06-28 07:55:53 C 16 26 41.639 -13 38 51.78 V U68
2024-06-28 08:01:32 C 16 26 41.937 -13 39 00.26 V U68
2024-06-28 08:26:22 C 16 26 43.685 -13 39 32.52 V U68
2024-06-28 08:32:02 C 16 26 43.983 -13 39 40.80 V U68
2024-06-28 22:05:00 C 16 27 44.654 -13 58 04.62 Z C23
2024-06-28 22:09:19 C 16 27 44.882 -13 58 09.95 Z C23
2024-06-28 22:13:37 C 16 27 45.187 -13 58 15.96 Z C23
2024-06-29 05:18:37 C 16 28 15.365 -14 07 05.12 V W68
2024-06-29 05:26:09 C 16 28 15.864 -14 07 14.77 V W68
2024-06-29 05:30:45 C 16 28 16.181 -14 07 20.78 V W68
2024-06-29 06:21:59 C 16 28 19.644 -14 08 27.85 V W68
2024-07-01 00:17:02 C 16 31 20.724 -15 01 51.56 V M22
2024-07-01 00:21:11 C 16 31 20.986 -15 01 56.46 V M22
2024-07-01 00:30:12 C 16 31 21.614 -15 02 06.94 V M22
2024-07-01 00:57:58 C 16 31 23.498 -15 02 40.81 V M22
2024-07-02 03:11:03 C 16 33 15.835 -15 34 13.76 V W68
2024-07-02 03:50:03 C 16 33 18.310 -15 34 59.23 V W68
2024-07-02 03:58:35 C 16 33 18.862 -15 35 09.53 V W68
2024-07-02 08:32:41 C 16 33 38.514 -15 40 52.75 X F51
2024-07-02 08:49:39 C 16 33 39.574 -15 41 12.43 X F51
2024-07-02 09:06:43 C 16 33 40.634 -15 41 32.10 X F51
2024-07-02 09:23:44 C 16 33 41.702 -15 41 51.77 X F51
2024-07-03 03:10:56 C 16 34 56.328 -16 01 50.52 V W68
2024-07-03 03:15:33 C 16 34 56.616 -16 01 55.78 V W68
2024-07-03 03:23:29 C 16 34 57.108 -16 02 04.85 V W68
2024-07-03 08:21:30 C 16 35 18.053 -16 08 00.96 V T08
2024-07-03 08:25:35 C 16 35 18.310 -16 08 05.75 V T08
2024-07-03 08:49:09 C 16 35 19.752 -16 08 31.99 V T08
2024-07-05 20:51:33 C 16 39 26.554 -17 11 57.70 V M22
2024-07-05 20:56:06 C 16 39 26.813 -17 12 02.45 V M22
2024-07-05 21:06:30 C 16 39 27.451 -17 12 12.78 V M22
2024-07-05 21:09:05 C 16 39 27.619 -17 12 15.52 V M22
2024-07-05 21:56:02 C 16 39 30.514 -17 13 02.14 V M22
2024-07-05 21:58:40 C 16 39 30.667 -17 13 04.98 V M22
2024-07-05 22:03:52 C 16 39 30.994 -17 13 09.98 V M22
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)