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
2019-04-15 00:28:08 S 19 15 02.198 +21 00 48.56 L C51
2019-04-15 03:36:38 S 19 15 22.865 +20 53 51.40 L C51
2019-04-15 06:44:57 S 19 15 43.445 +20 46 55.20 L C51
2019-04-30 01:00:22 C 19 43 23.91 +09 56 26.4 q 160
2019-04-30 01:02:40 C 19 43 24.02 +09 56 22.7 q 160
2019-04-30 01:05:02 C 19 43 24.18 +09 56 19.4 q 160
2019-05-07 03:04:35 C 19 50 20.52 +05 49 18.2 q 160
2019-05-07 03:07:31 C 19 50 20.59 +05 49 14.7 q 160
2019-05-07 03:10:26 C 19 50 20.72 +05 49 10.4 q 160
2019-05-15 12:45:51 C 19 54 03.24 +01 23 16.9 V T05
2019-05-15 12:48:31 C 19 54 03.23 +01 23 13.5 V T05
2019-05-15 12:49:51 C 19 54 03.22 +01 23 11.7 V T05
2019-05-15 12:52:38 C 19 54 03.25 +01 23 08.2 V T05
2019-05-15 13:12:42 C 19 54 03.14 +01 22 42.7 V T05
2019-05-16 01:36:13 C 19 54 07.46 +01 06 43.3 q 160
2019-05-16 01:39:07 C 19 54 07.48 +01 06 39.4 q 160
2019-05-16 01:42:05 C 19 54 07.48 +01 06 35.3 q 160
2019-05-25 12:57:45 C 19 52 21.51 -03 35 26.7 V T08
2019-05-25 13:11:35 C 19 52 21.09 -03 35 43.8 V T08
2019-05-25 13:25:22 C 19 52 20.66 -03 36 00.3 V T08
2019-05-27 12:30:30 C 19 51 15.35 -04 33 23.4 V T05
2019-05-27 12:34:52 C 19 51 15.20 -04 33 28.8 V T05
2019-05-27 13:02:39 C 19 51 14.21 -04 34 02.6 V T05
2019-05-29 13:00:07 C 19 49 51.99 -05 32 11.5 V T08
2019-05-29 13:04:17 C 19 49 51.83 -05 32 16.5 V T08
2019-05-29 13:18:25 C 19 49 51.24 -05 32 33.6 V T08
2019-05-29 13:29:59 C 19 49 50.77 -05 32 47.6 V T08
2019-05-31 12:34:23 C 19 48 16.23 -06 29 36.7 V T05
2019-05-31 12:38:28 C 19 48 16.05 -06 29 41.6 V T05
2019-05-31 12:52:19 C 19 48 15.42 -06 29 58.2 V T05
2019-05-31 13:06:53 C 19 48 14.75 -06 30 15.9 V T05
2019-06-02 12:11:47 C 19 46 26.46 -07 26 45.7 V T08
2019-06-02 12:15:59 C 19 46 26.24 -07 26 50.6 V T08
2019-06-02 12:47:23 C 19 46 24.67 -07 27 28.5 V T08
2019-06-08 10:15:39 C 19 39 46.10 -10 14 39.1 V T05
2019-06-08 10:23:13 C 19 39 45.66 -10 14 47.9 V T05
2019-06-08 10:42:24 C 19 39 44.48 -10 15 10.6 V T05
2019-06-08 10:46:22 C 19 39 44.26 -10 15 15.3 V T05
2019-06-10 10:30:59 C 19 37 08.59 -11 10 22.8 V T08
2019-06-10 10:34:59 C 19 37 08.33 -11 10 27.7 V T08
2019-06-10 10:43:37 C 19 37 07.77 -11 10 37.7 V T08
2019-06-14 11:00:10 C 19 31 29.65 -12 58 55.3 V T08
2019-06-14 11:04:18 C 19 31 29.40 -12 59 00.0 V T08
2019-06-14 11:12:05 C 19 31 28.83 -12 59 08.7 V T08
2019-06-14 11:29:43 C 19 31 27.62 -12 59 28.2 V T08
2019-06-15 07:04:52 C 19 30 16.39 -13 21 00.4 U I41
2019-06-15 07:05:31 C 19 30 16.35 -13 21 01.1 U I41
2019-06-15 08:32:04 C 19 30 10.45 -13 22 36.4 U I41
2019-06-15 09:01:53 C 19 30 08.39 -13 23 09.2 U I41
2019-06-16 10:00:09 C 19 28 36.24 -13 50 03.7 V T05
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)