IAA RAS IAA Minor Planet Database

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
2019-02-28 13:23:39 C 12 01 57.33 +47 30 28.8 – V T08
2019-02-28 13:38:20 C 12 02 02.47 +47 31 05.0 – V T08
2019-03-01 20:03:01 C 12 14 10.77 +48 46 40.3 – q 006
2019-03-01 20:05:00 C 12 14 11.65 +48 46 45.3 – q 006
2019-03-01 20:07:00 C 12 14 12.45 +48 46 50.5 – q 006
2019-03-01 20:09:00 C 12 14 13.27 +48 46 55.8 – q 006
2019-03-01 20:11:00 C 12 14 14.06 +48 47 01.3 – q 006
2019-03-01 20:13:00 C 12 14 14.90 +48 47 06.5 – q 006
2019-03-01 20:15:00 C 12 14 15.73 +48 47 11.7 – q 006
2019-03-01 20:17:00 C 12 14 16.52 +48 47 17.2 – q 006
2019-03-03 09:22:28 C 12 30 22.99 +50 16 47.4 – V 703
2019-03-03 09:30:48 C 12 30 26.60 +50 17 06.6 – V 703
2019-03-03 09:39:09 C 12 30 30.20 +50 17 25.6 – V 703
2019-03-03 09:47:06 C 12 30 33.65 +50 17 43.7 – V 703
2019-03-03 11:34:40 C 12 31 20.61 +50 21 42.6 – V G96
2019-03-03 11:43:17 C 12 31 24.42 +50 22 01.1 – V G96
2019-03-03 11:51:57 C 12 31 28.24 +50 22 20.0 – V G96
2019-03-03 12:00:35 C 12 31 32.06 +50 22 38.6 – V G96
2019-03-04 13:28:50 C 12 43 49.50 +51 19 33.8 – V T08
2019-03-04 13:47:57 C 12 43 58.42 +51 20 13.0 – V T08
2019-03-04 13:59:28 C 12 44 03.82 +51 20 36.5 – V T08
2019-03-04 14:14:35 C 12 44 10.92 +51 21 07.0 – V T08
2019-03-07 08:48:27 C 13 20 25.90 +53 24 44.7 – V 703
2019-03-07 08:56:51 C 13 20 30.54 +53 24 58.1 – V 703
2019-03-07 09:05:03 C 13 20 35.08 +53 25 11.1 – V 703
2019-03-07 09:12:55 C 13 20 39.45 +53 25 23.3 – V 703
2019-03-08 13:26:12 C 13 37 37.98 +54 04 34.9 – V T08
2019-03-08 13:40:21 C 13 37 46.21 +54 04 51.5 – V T08
2019-03-08 13:54:27 C 13 37 54.42 +54 05 07.7 – V T08
2019-03-08 14:08:28 C 13 38 02.61 +54 05 23.5 – V T08
2019-03-08 20:31:43 C 13 42 10.68 +54 11 35.8 – q 006
2019-03-08 20:32:52 C 13 42 11.40 +54 11 37.4 – q 006
2019-03-08 20:34:02 C 13 42 12.15 +54 11 38.9 – q 006
2019-03-08 20:35:11 C 13 42 12.85 +54 11 40.2 – q 006
2019-03-08 20:36:20 C 13 42 13.56 +54 11 42.0 – q 006
2019-03-08 20:37:28 C 13 42 14.24 +54 11 43.5 – q 006
2019-03-08 20:38:36 C 13 42 14.98 +54 11 44.7 – q 006
2019-03-08 20:39:45 C 13 42 15.66 +54 11 46.5 – q 006
2019-03-16 14:35:57 C 15 45 00.06 +53 29 59.0 – V T08
2019-03-16 14:50:01 C 15 45 08.38 +53 29 36.3 – V T08
2019-03-16 15:04:03 C 15 45 16.71 +53 29 13.3 – V T08
2019-03-16 15:18:46 C 15 45 25.45 +53 28 49.0 – V T08
2019-03-17 09:40:36 C 15 56 56.35 +52 56 39.1 – V 703
2019-03-17 09:48:32 C 15 57 00.90 +52 56 25.5 – V 703
2019-03-17 09:56:27 C 15 57 05.61 +52 56 11.8 – V 703
2019-03-17 10:04:23 C 15 57 10.08 +52 55 58.5 – V 703
2019-03-23 02:53:57 C 17 09 26.03 +47 11 39.4 – V K87
2019-03-23 03:08:31 C 17 09 32.16 +47 10 56.8 – V K87
2019-03-23 03:31:30 C 17 09 41.80 +47 09 49.1 – V K87
2019-03-23 03:57:58 C 17 09 52.87 +47 08 30.7 – V K87
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)