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
2024-02-14 00:54:33 C 06 42 34.08 +32 51 49.3 V W46
2024-02-14 01:07:45 C 06 42 33.20 +32 52 00.1 V W46
2024-02-14 03:53:48 C 06 42 22.241 +32 54 15.70 V 703
2024-02-14 03:57:08 C 06 42 21.982 +32 54 18.50 V 703
2024-02-14 04:00:31 C 06 42 21.751 +32 54 21.49 V 703
2024-02-14 04:03:55 C 06 42 21.496 +32 54 24.16 V 703
2024-02-14 07:41:03 C 06 42 07.406 +32 57 24.70 V T05
2024-02-14 07:46:16 C 06 42 07.025 +32 57 28.87 V T05
2024-02-14 07:57:55 C 06 42 06.192 +32 57 38.20 V T05
2024-02-14 08:29:36 C 06 42 03.905 +32 58 03.40 V T05
2024-02-15 05:30:35 C 06 40 45.451 +33 14 51.18 V 703
2024-02-15 05:34:01 C 06 40 45.199 +33 14 53.88 V 703
2024-02-15 05:37:21 C 06 40 44.972 +33 14 56.44 V 703
2024-02-15 05:40:44 C 06 40 44.692 +33 14 59.28 V 703
2024-02-16 03:24:05 C 06 39 27.796 +33 32 21.88 V 703
2024-02-16 03:27:05 C 06 39 27.562 +33 32 24.18 V 703
2024-02-16 03:30:04 C 06 39 27.385 +33 32 26.34 V 703
2024-02-16 03:33:03 C 06 39 27.184 +33 32 28.90 V 703
2024-02-16 18:59:27 B 06 38 33.66 +33 44 45.1 V Y87
2024-02-16 19:18:56 B 06 38 32.90 +33 44 58.0 V Y87
2024-02-16 19:22:51 B 06 38 32.68 +33 45 01.1 V Y87
2024-02-17 04:48:21 C 06 37 59.981 +33 52 36.08 V 703
2024-02-17 04:55:29 C 06 37 59.394 +33 52 40.66 V 703
2024-02-17 04:59:02 C 06 37 59.164 +33 52 43.21 V 703
2024-02-18 07:22:41 C 06 36 33.672 +34 13 42.49 V T05
2024-02-18 07:26:46 C 06 36 33.422 +34 13 45.48 V T05
2024-02-18 07:34:27 C 06 36 32.954 +34 13 51.78 V T05
2024-02-18 08:25:41 C 06 36 29.803 +34 14 31.27 V T05
2024-02-18 19:21:25 B 06 35 57.19 +34 22 58.6 V Y87
2024-02-18 19:22:27 B 06 35 57.17 +34 22 59.8 V Y87
2024-02-18 19:25:33 B 06 35 56.96 +34 23 02.1 V Y87
2024-02-22 04:56:58 B 06 32 10.289 +35 26 47.87 X W42
2024-02-22 05:02:43 B 06 32 10.015 +35 26 52.19 X W42
2024-02-22 05:08:15 B 06 32 09.751 +35 26 56.22 X W42
2024-02-23 08:14:06 C 06 31 07.524 +35 48 03.35 V T05
2024-02-23 08:18:19 C 06 31 07.354 +35 48 06.80 V T05
2024-02-23 08:27:01 C 06 31 06.950 +35 48 12.78 V T05
2024-02-23 08:51:55 C 06 31 05.825 +35 48 31.43 V T05
2024-02-25 09:01:35 C 06 29 28.903 +36 25 41.02 V T05
2024-02-25 09:24:48 C 06 29 28.020 +36 25 55.96 V T05
2024-02-25 09:29:31 C 06 29 27.794 +36 26 00.28 V T05
2024-02-25 09:37:25 C 06 29 27.530 +36 26 05.14 V T05
2024-02-26 08:40:46 C 06 28 48.612 +36 43 51.31 V T05
2024-02-26 08:45:22 C 06 28 48.454 +36 43 54.66 V T05
2024-02-26 08:53:13 C 06 28 48.209 +36 44 00.31 V T05
2024-02-26 09:26:27 C 06 28 47.030 +36 44 24.47 V T05
2024-02-27 08:32:24 C 06 28 12.780 +37 02 10.03 V T05
2024-02-27 08:40:13 C 06 28 12.516 +37 02 16.04 V T05
2024-02-27 08:56:21 C 06 28 12.012 +37 02 27.53 V T05
2024-02-27 09:02:22 C 06 28 11.842 +37 02 31.74 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)