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
2024-01-15 06:21:25 C 07 36 57.866 +23 18 15.91 V 703
2024-01-15 11:03:58 C 07 36 38.839 +23 21 36.32 V T08
2024-01-15 11:08:45 C 07 36 38.498 +23 21 39.49 V T08
2024-01-15 11:45:17 C 07 36 35.887 +23 22 04.69 V T08
2024-01-15 11:52:46 C 07 36 35.342 +23 22 09.66 V T08
2024-01-16 06:11:55 C 07 35 23.428 +23 34 56.03 V 703
2024-01-16 06:14:53 C 07 35 23.219 +23 34 58.37 V 703
2024-01-16 06:17:52 C 07 35 22.988 +23 35 00.46 V 703
2024-01-16 06:20:50 C 07 35 22.780 +23 35 03.37 V 703
2024-01-16 11:49:43 C 07 34 59.827 +23 38 59.50 V T05
2024-01-16 12:35:05 C 07 34 56.518 +23 39 31.14 V T05
2024-01-16 12:39:38 C 07 34 56.198 +23 39 34.27 V T05
2024-01-16 12:47:00 C 07 34 55.656 +23 39 39.53 V T05
2024-01-17 06:37:06 C 07 33 43.736 +23 52 21.07 V 703
2024-01-17 06:40:24 C 07 33 43.513 +23 52 25.21 V 703
2024-01-17 06:43:41 C 07 33 43.254 +23 52 27.62 V 703
2024-01-17 06:46:59 C 07 33 42.970 +23 52 30.40 V 703
2024-01-17 07:09:55 C 07 33 41.346 +23 52 46.67 V V00
2024-01-17 07:17:52 C 07 33 40.748 +23 52 52.43 V V00
2024-01-17 07:25:48 C 07 33 40.158 +23 52 58.12 V V00
2024-01-17 07:33:47 C 07 33 39.564 +23 53 03.80 V V00
2024-01-18 08:55:08 C 07 31 53.892 +24 11 36.96 V T08
2024-01-18 08:57:48 C 07 31 53.666 +24 11 38.80 V T08
2024-01-18 09:05:11 C 07 31 53.119 +24 11 44.38 V T08
2024-01-18 09:14:46 C 07 31 52.370 +24 11 51.43 V T08
2024-01-19 04:35:28 C 07 30 29.956 +24 26 05.42 V G96
2024-01-19 04:43:31 C 07 30 29.340 +24 26 11.69 V G96
2024-01-19 04:51:36 C 07 30 28.717 +24 26 17.92 V G96
2024-01-19 04:59:40 C 07 30 28.076 +24 26 24.11 V G96
2024-01-19 05:46:13 C 07 30 24.480 +24 26 58.60 V 703
2024-01-19 05:49:32 C 07 30 24.232 +24 27 02.20 V 703
2024-01-19 05:52:51 C 07 30 23.980 +24 27 04.50 V 703
2024-01-19 05:56:10 C 07 30 23.720 +24 27 06.48 V 703
2024-01-19 10:09:56 C 07 30 04.956 +24 30 21.64 V T08
2024-01-19 10:15:16 C 07 30 04.514 +24 30 25.85 V T08
2024-01-19 10:57:01 C 07 30 01.238 +24 30 56.88 V T08
2024-01-20 08:56:01 C 07 28 25.435 +24 47 32.28 V T05
2024-01-20 09:00:52 C 07 28 25.056 +24 47 35.88 V T05
2024-01-20 09:08:49 C 07 28 24.420 +24 47 41.96 V T05
2024-01-20 09:16:29 C 07 28 23.803 +24 47 47.80 V T05
2024-01-21 08:13:32 C 07 26 41.470 +25 05 21.37 V T05
2024-01-21 08:16:08 C 07 26 41.254 +25 05 23.46 V T05
2024-01-21 08:21:01 C 07 26 40.850 +25 05 27.17 V T05
2024-01-21 08:26:31 C 07 26 40.411 +25 05 31.52 V T05
2024-01-21 08:28:28 C 07 26 40.250 +25 05 33.29 V T05
2024-01-21 08:31:04 C 07 26 40.042 +25 05 35.05 V T05
2024-01-21 08:35:37 C 07 26 39.674 +25 05 38.69 V T05
2024-01-21 08:43:35 C 07 26 39.012 +25 05 45.13 V T05
2024-01-27 21:56:12 B 07 14 14.906 +27 11 17.88 V L65
2024-01-27 22:00:20 B 07 14 14.568 +27 11 21.26 V L65
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)