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
2019-02-15 23:47:03 C 10 47 39.49 +34 58 16.4 q 160
2019-02-15 23:49:54 C 10 47 39.89 +34 58 22.8 q 160
2019-02-16 12:21:58 C 10 49 36.68 +35 26 33.1 V T08
2019-02-16 12:30:16 C 10 49 37.87 +35 26 51.3 V T08
2019-02-16 12:56:02 C 10 49 41.57 +35 27 48.0 V T08
2019-02-16 18:40:23 C 10 50 41.11 +35 40 02.1 V L18
2019-02-16 18:44:54 C 10 50 41.88 +35 40 12.4 V L18
2019-02-16 18:59:57 C 10 50 44.22 +35 40 48.6 V L18
2019-02-16 19:05:14 C 10 50 45.10 +35 41 00.0 V L18
2019-02-16 19:09:45 C 10 50 45.83 +35 41 11.1 V L18
2019-02-17 00:10:41 C 10 51 32.82 +35 52 48.2 q 160
2019-02-17 00:13:37 C 10 51 33.29 +35 52 55.1 q 160
2019-02-17 00:16:31 C 10 51 33.73 +35 53 01.5 q 160
2019-02-18 19:27:50 C 10 59 10.57 +37 32 55.9 q K74
2019-02-18 19:30:17 C 10 59 11.00 +37 33 01.9 q K74
2019-02-18 19:33:22 C 10 59 11.58 +37 33 09.5 q K74
2019-02-18 19:35:49 C 10 59 12.02 +37 33 15.5 q K74
2019-02-22 20:55:59 C 11 20 08.10 +41 34 44.4 q 006
2019-02-22 20:56:59 C 11 20 08.33 +41 34 47.0 q 006
2019-02-22 20:58:39 C 11 20 08.74 +41 34 51.6 q 006
2019-02-22 21:00:00 C 11 20 09.02 +41 34 55.1 q 006
2019-02-22 21:01:19 C 11 20 09.38 +41 34 58.8 q 006
2019-02-22 21:02:39 C 11 20 09.69 +41 35 02.5 q 006
2019-02-22 21:03:59 C 11 20 09.99 +41 35 05.6 q 006
2019-02-22 21:05:19 C 11 20 10.36 +41 35 09.3 q 006
2019-02-23 16:04:10 C 11 24 59.95 +42 23 49.1 q 168
2019-02-23 16:18:00 C 11 25 03.54 +42 24 26.2 q 168
2019-02-23 16:28:01 C 11 25 06.12 +42 24 53.2 q 168
2019-02-23 16:42:10 C 11 25 09.75 +42 25 31.0 q 168
2019-02-23 20:43:41 C 11 26 13.66 +42 36 08.4 V G34
2019-02-23 20:45:23 C 11 26 14.28 +42 36 12.5 q K74
2019-02-23 20:46:06 C 11 26 14.27 +42 36 14.7 V G34
2019-02-23 20:48:19 C 11 26 14.85 +42 36 20.8 V G34
2019-02-23 20:50:43 C 11 26 15.48 +42 36 27.2 V G34
2019-02-23 21:07:32 C 11 26 19.98 +42 37 12.3 q K74
2019-02-23 21:09:57 C 11 26 20.59 +42 37 18.8 q K74
2019-02-24 12:41:20 C 11 30 30.22 +43 18 26.1 V T08
2019-02-24 12:56:43 C 11 30 34.16 +43 19 05.3 V T08
2019-02-24 13:04:12 C 11 30 36.08 +43 19 24.5 V T08
2019-02-24 13:24:27 C 11 30 41.30 +43 20 15.9 V T08
2019-02-25 02:50:00 C 11 34 38.15 +43 54 53.3 V W34
2019-02-25 02:53:55 C 11 34 39.24 +43 55 03.9 V W34
2019-02-25 03:01:42 C 11 34 41.41 +43 55 25.6 V W34
2019-02-25 03:04:59 C 11 34 42.36 +43 55 34.7 V W34
2019-02-26 09:07:49 C 11 43 49.18 +45 14 39.5 V 703
2019-02-26 09:16:17 C 11 43 51.70 +45 15 01.4 V 703
2019-02-26 09:24:14 C 11 43 54.13 +45 15 21.9 V 703
2019-02-26 09:32:06 C 11 43 56.40 +45 15 42.3 V 703
2019-02-28 12:57:42 C 12 01 48.26 +47 29 24.3 V T08
2019-02-28 13:09:09 C 12 01 52.26 +47 29 52.8 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)