138947 (2001 BA40)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2537378162 ± 2.00e+00
Semi-major axis (a)1.1189081305 AU ± 3.00e+00
Inclination (i)12.84611272° ± 4.00e+00
Long. of Asc. Node (Ω)270.86238596° ± 5.00e+00
Arg. of Perihelion (ω)0.08883628° ± 6.00e+00
Mean Anomaly (M)230.87065362° ± 2.08e-04
Mean Motion (n)0.8327614864°/day ± 3.35e+00
Perihelion dist (q)0.83499882 AU ± 3.17e+00
Aphelion dist (Q)1.40281744 AU ± 4.38e+00
Orbital Period1.18356372 yr ± 4.76e+00
NGA Modelr2
A2-8.68230348e-07 AU/d²
Physical Parameters
H (abs. magnitude)18.83
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-27
RMS Residual0.537″
Uncertainty0
Orbit TypeApollo
MOID0.182344 AU
Observations Used506
Gaia Obs Used30
Oppositions2
Arc Total2001-2015
First Observation Used2001-01-23
Last Observation Used2022-03-23
Observations (527)
Date Type RA Dec Mag Band Observatory
2002-01-11 07:29:32 C 03 05 26.34 +19 17 34.9 o 608
2002-12-31 03:04:51 C 23 23 45.02 +08 10 42.7 c 696
2002-12-31 03:07:57 C 23 23 45.49 +08 10 43.8 c 696
2006-10-20 11:59:52 C 09 14 13.87 +15 11 52.2 c 691
2006-10-20 12:17:48 C 09 14 15.50 +15 11 38.6 c 691
2006-10-23 11:42:50 C 09 21 02.54 +14 17 25.9 c 691
2006-10-23 12:00:50 C 09 21 04.28 +14 17 12.6 c 691
2006-10-23 12:18:50 C 09 21 05.83 +14 16 58.3 c 691
2007-10-19 10:20:15 C 07 21 35.63 +34 32 15.3 r 448
2007-10-19 10:55:14 C 07 21 37.49 +34 32 05.1 r 448
2007-10-19 11:30:59 C 07 21 39.50 +34 31 55.0 r 448
2007-11-08 09:08:54 C 07 38 52.24 +32 01 15.3 19.5 c 704
2007-11-08 09:26:40 C 07 38 52.30 +32 01 10.4 19.8 c 704
2007-11-08 09:44:47 C 07 38 52.49 +32 01 04.2 20.0 c 704
2007-11-08 10:02:30 C 07 38 52.74 +32 00 58.2 20.4 c 704
2007-11-08 10:20:13 C 07 38 52.77 +32 00 51.1 19.8 c 704
2007-11-19 07:20:40 C 07 37 19.23 +30 23 46.6 r 448
2007-11-19 07:30:57 C 07 37 18.94 +30 23 42.6 r 448
2007-11-19 07:59:13 C 07 37 18.17 +30 23 32.0 r 448
2007-12-02 00:56:43 C 07 22 34.72 +28 03 29.1 r B15
2007-12-02 01:01:24 C 07 22 34.36 +28 03 26.7 r B15
2007-12-02 01:11:07 C 07 22 33.60 +28 03 21.8 r B15
2007-12-05 08:05:33 C 07 16 16.10 +27 19 45.2 o 691
2007-12-05 08:27:33 C 07 16 14.08 +27 19 33.3 o 691
2007-12-05 08:49:33 C 07 16 12.07 +27 19 20.8 o 691
2007-12-05 09:14:57 C 07 16 09.79 +27 19 06.2 o 691
2007-12-05 09:40:34 C 07 16 07.40 +27 18 51.6 o 691
2007-12-05 10:06:19 C 07 16 05.03 +27 18 36.7 o 691
2007-12-10 07:40:28 C 07 04 49.95 +26 05 43.7 18.9 c 704
2007-12-10 07:59:05 C 07 04 47.92 +26 05 32.2 19.1 c 704
2007-12-10 08:17:40 C 07 04 45.93 +26 05 19.7 19.5 c 704
2007-12-10 08:36:23 C 07 04 43.83 +26 05 07.2 19.3 c 704
2007-12-10 08:54:58 C 07 04 41.81 +26 04 55.1 18.9 c 704
2007-12-11 23:07:57 C 07 00 36.39 +25 38 59.7 c B49
2007-12-14 07:37:50 C 06 54 11.91 +24 58 48.8 18.4 c 704
2007-12-14 07:56:33 C 06 54 09.66 +24 58 36.2 18.7 c 704
2007-12-14 08:15:15 C 06 54 07.40 +24 58 21.5 19.2 c 704
2007-12-14 08:33:57 C 06 54 05.05 +24 58 08.5 18.4 c 704
2007-12-14 10:09:07 C 06 53 53.26 +24 56 55.1 r H45
2007-12-14 10:11:26 C 06 53 52.95 +24 56 53.4 r H45
2007-12-14 10:14:32 C 06 53 52.56 +24 56 52.3 r H45
2007-12-14 10:16:35 C 06 53 52.34 +24 56 50.4 r H45
2007-12-14 10:17:59 C 06 53 52.14 +24 56 49.2 r H45
2007-12-17 10:28:00 C 06 45 10.25 +24 01 49.0 r H45
2007-12-17 10:30:16 C 06 45 09.91 +24 01 47.0 r H45
2007-12-17 10:31:54 C 06 45 09.75 +24 01 46.1 r H45
2007-12-17 10:33:54 C 06 45 09.47 +24 01 44.3 r H45
2007-12-17 10:35:35 C 06 45 09.28 +24 01 42.9 r H45
2007-12-17 10:38:02 C 06 45 08.94 +24 01 40.8 r H45
2007-12-17 10:39:27 C 06 45 08.76 +24 01 39.9 r H45