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
2024-02-28 08:24:07 C 06 27 41.846 +37 20 28.14 V T08
2024-02-28 08:28:12 C 06 27 41.702 +37 20 31.13 V T08
2024-02-28 08:42:24 C 06 27 41.302 +37 20 41.75 V T08
2024-02-28 08:56:59 C 06 27 40.910 +37 20 52.26 V T08
2024-03-01 08:32:43 C 06 26 54.526 +37 57 19.66 V T05
2024-03-01 08:37:22 C 06 26 54.451 +37 57 23.22 V T05
2024-03-01 08:45:14 C 06 26 54.281 +37 57 28.44 V T05
2024-03-01 09:02:28 C 06 26 53.933 +37 57 41.18 V T05
2024-03-03 13:14:45 S 06 26 28.19 +38 37 36.6 L C51
2024-03-03 16:20:53 S 06 26 27.45 +38 39 59.2 L C51
2024-03-03 19:26:16 S 06 26 26.69 +38 42 21.7 L C51
2024-03-04 01:37:12 S 06 26 25.44 +38 47 06.4 L C51
2024-03-04 03:09:16 S 06 26 25.14 +38 48 18.0 L C51
2024-03-04 06:15:22 S 06 26 24.69 +38 50 40.0 L C51
2024-03-04 20:30:20 C 06 26 23.186 +39 01 32.09 Z C23
2024-03-04 20:52:09 C 06 26 22.997 +39 01 48.76 Z C23
2024-03-04 21:17:03 C 06 26 22.855 +39 02 07.26 Z C23
2024-03-06 20:49:43 C 06 26 34.008 +39 38 48.95 Z C23
2024-03-06 20:59:35 C 06 26 34.010 +39 38 56.40 Z C23
2024-03-06 21:08:23 C 06 26 34.058 +39 39 03.02 Z C23
2024-03-07 21:21:43 C 06 26 47.851 +39 57 48.60 Z C23
2024-03-07 21:24:58 C 06 26 47.873 +39 57 51.16 Z C23
2024-03-10 22:14:28 B 06 28 03.55 +40 54 47.8 Z Y84
2024-03-10 22:31:10 B 06 28 03.83 +40 55 00.5 Z Y84
2024-03-10 22:47:54 B 06 28 04.14 +40 55 12.8 Z Y84
2024-03-11 02:58:46 C 06 28 11.312 +40 58 44.72 V G96
2024-03-11 03:07:11 C 06 28 11.424 +40 58 51.17 V G96
2024-03-11 03:14:53 C 06 28 11.536 +40 58 57.25 V G96
2024-03-11 03:22:28 C 06 28 11.644 +40 59 03.08 V G96
2024-03-13 20:20:18 B 06 30 06.67 +41 50 34.4 Z Y84
2024-03-13 20:36:49 B 06 30 07.10 +41 50 47.8 Z Y84
2024-03-13 20:53:19 B 06 30 07.53 +41 51 00.5 Z Y84
2024-03-15 06:26:50 C 06 31 23.770 +42 18 21.67 V T08
2024-03-15 06:39:12 C 06 31 24.113 +42 18 31.43 V T08
2024-03-15 06:43:12 C 06 31 24.228 +42 18 34.38 V T08
2024-03-15 07:00:48 C 06 31 24.739 +42 18 48.24 V T08
2024-03-17 05:30:27 C 06 33 30.286 +42 56 50.57 V T05
2024-03-17 05:36:57 C 06 33 30.540 +42 56 55.54 V T05
2024-03-17 05:45:03 C 06 33 30.818 +42 57 02.30 V T05
2024-03-17 06:02:48 C 06 33 31.474 +42 57 17.28 V T05
2024-03-18 06:34:47 C 06 34 45.715 +43 17 34.76 V T05
2024-03-18 06:39:22 C 06 34 45.941 +43 17 38.76 V T05
2024-03-18 06:48:05 C 06 34 46.310 +43 17 45.28 V T05
2024-03-18 07:21:28 C 06 34 47.676 +43 18 11.59 V T05
2024-03-18 22:16:08 C 06 35 36.137 +43 30 17.32 Z C23
2024-03-18 22:22:22 C 06 35 36.466 +43 30 22.93 Z C23
2024-03-18 22:28:37 C 06 35 36.821 +43 30 27.79 Z C23
2024-03-19 07:23:05 C 06 36 06.934 +43 38 16.73 V T08
2024-03-19 07:28:27 C 06 36 07.162 +43 38 20.80 V T08
2024-03-19 08:13:12 C 06 36 09.209 +43 38 55.64 V T08
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)