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
2024-07-05 22:11:39 C 16 39 31.517 -17 13 17.98 V M22
2024-07-06 08:26:01 C 16 40 13.602 -17 23 54.36 X F52
2024-07-06 08:37:25 C 16 40 14.292 -17 24 05.59 X F52
2024-07-06 08:48:46 C 16 40 14.981 -17 24 16.80 X F52
2024-07-07 03:10:08 C 16 41 29.191 -17 41 51.25 V W68
2024-07-07 03:14:45 C 16 41 29.472 -17 41 55.36 V W68
2024-07-07 03:23:57 C 16 41 30.024 -17 42 04.14 V W68
2024-07-07 03:42:40 C 16 41 31.181 -17 42 22.14 V W68
2024-07-14 02:42:03 C 16 52 34.524 -20 02 50.28 V W68
2024-07-14 02:53:24 C 16 52 35.210 -20 02 58.34 V W68
2024-07-14 02:57:57 C 16 52 35.489 -20 03 01.84 V W68
2024-07-14 03:19:49 C 16 52 36.802 -20 03 17.53 V W68
2025-10-25 19:06:09 C 02 31 34.442 +05 25 34.32 W O18
2025-10-25 19:59:58 C 02 31 31.616 +05 25 20.91 W O18
2025-10-26 17:09:41 C 02 30 26.046 +05 19 50.50 W O18
2025-10-26 18:01:41 C 02 30 23.268 +05 19 37.55 W O18
2025-10-27 18:06:52 C 02 29 07.981 +05 13 25.23 W O18
2025-10-27 18:58:56 C 02 29 05.203 +05 13 11.53 W O18
2025-10-28 17:09:14 C 02 27 55.661 +05 07 32.06 W O18
2025-10-28 18:24:15 C 02 27 51.620 +05 07 12.94 W O18
2025-10-29 17:12:02 C 02 26 39.798 +05 01 27.59 W O18
2025-10-29 18:06:04 C 02 26 36.890 +05 01 13.83 W O18
2025-10-30 10:55:46 C 02 25 43.654 +04 57 02.71 X F51
2025-10-30 11:13:17 C 02 25 42.682 +04 56 58.48 X F51
2025-10-30 11:30:48 C 02 25 41.751 +04 56 54.18 X F51
2025-10-30 16:27:00 C 02 25 26.290 +04 55 38.59 W O18
2025-10-30 17:15:13 C 02 25 23.707 +04 55 26.85 W O18
2025-10-30 17:20:49 C 02 25 23.404 +04 55 25.50 W O18
2025-10-30 18:09:00 C 02 25 20.792 +04 55 13.38 W O18
2025-10-31 17:50:59 C 02 24 05.667 +04 49 22.92 W O18
2025-10-31 18:39:11 C 02 24 03.069 +04 49 11.22 W O18
2025-11-01 18:12:58 C 02 22 48.326 +04 43 27.93 W O18
2025-11-01 19:08:39 C 02 22 45.334 +04 43 14.40 W O18
2025-11-13 18:28:12 C 02 07 57.067 +03 42 15.43 W O18
2025-11-13 19:05:44 C 02 07 55.189 +03 42 09.08 W O18
2025-11-13 19:33:04 C 02 07 53.839 +03 42 04.11 W O18
2025-11-14 17:45:52 C 02 06 49.174 +03 38 11.69 W O18
2025-11-14 17:47:28 C 02 06 49.109 +03 38 11.28 W O18
2025-11-14 19:15:02 C 02 06 44.777 +03 37 56.49 W O18
2025-11-15 18:34:16 C 02 05 37.796 +03 34 02.17 W O18
2025-11-15 18:35:53 C 02 05 37.727 +03 34 01.97 W O18
2025-11-19 15:48:42 C 02 01 20.544 +03 20 03.82 W O18
2025-11-19 17:31:09 C 02 01 15.901 +03 19 50.04 W O18
2025-11-22 15:21:51 C 01 58 16.092 +03 11 12.28 W O18
2025-11-22 17:38:48 C 01 58 10.260 +03 10 56.90 W O18
2025-11-23 02:20:03 C 01 57 49.00 +03 10 00.2 V H21
2025-11-23 02:30:52 C 01 57 48.56 +03 09 58.6 V H21
2025-11-24 15:29:38 C 01 56 19.146 +03 06 11.91 W O18
2025-11-24 17:30:24 C 01 56 14.271 +03 06 00.45 W O18
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)