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
2007-12-18 02:05:47 C 06 43 14.04 +23 49 24.2 c A24
2007-12-18 02:06:52 C 06 43 13.98 +23 49 22.2 c A24
2007-12-19 08:30:50 C 06 39 24.56 +23 24 52.3 o 691
2007-12-19 08:56:17 C 06 39 21.20 +23 24 30.7 o 691
2007-12-19 09:21:44 C 06 39 17.83 +23 24 10.1 o 691
2007-12-31 05:36:36 C 06 02 41.64 +19 13 13.4 r G96
2007-12-31 05:42:44 C 06 02 40.84 +19 13 06.6 r G96
2007-12-31 05:48:46 C 06 02 40.05 +19 13 01.2 r G96
2007-12-31 05:54:48 C 06 02 39.30 +19 12 55.8 r G96
2007-12-31 07:51:09 C 06 02 23.89 +19 11 08.4 r H45
2007-12-31 07:52:21 C 06 02 23.74 +19 11 06.8 r H45
2007-12-31 07:53:24 C 06 02 23.59 +19 11 06.1 r H45
2007-12-31 07:59:55 C 06 02 22.75 +19 11 00.1 r H45
2007-12-31 08:01:01 C 06 02 22.63 +19 10 59.1 r H45
2008-01-04 07:14:32 C 05 50 58.36 +17 45 02.5 r H45
2008-01-04 07:16:01 C 05 50 58.22 +17 45 00.6 r H45
2008-01-04 07:17:28 C 05 50 58.02 +17 44 59.3 r H45
2008-01-04 07:19:09 C 05 50 57.82 +17 44 57.9 r H45
2008-01-04 07:21:00 C 05 50 57.61 +17 44 56.4 r H45
2008-01-09 07:00:09 C 05 38 06.43 +16 01 54.1 r H45
2008-01-09 07:01:50 C 05 38 06.20 +16 01 52.1 r H45
2008-01-09 07:04:02 C 05 38 06.00 +16 01 51.1 r H45
2008-01-09 07:05:50 C 05 38 05.80 +16 01 48.9 r H45
2008-01-09 07:12:48 C 05 38 05.08 +16 01 43.7 r H45
2008-01-09 22:33:49 C 05 36 35.20 +15 49 01.9 r B15
2008-01-09 22:38:25 C 05 36 34.73 +15 48 58.1 r B15
2008-01-09 22:43:26 C 05 36 34.26 +15 48 53.9 r B15
2008-01-11 07:02:58 C 05 33 30.32 +15 22 57.1 r H45
2008-01-11 07:17:42 C 05 33 28.89 +15 22 45.4 r H45
2008-01-11 07:20:01 C 05 33 28.68 +15 22 43.3 r H45
2008-01-11 07:21:55 C 05 33 28.48 +15 22 41.6 r H45
2008-01-15 01:59:09 C 05 25 47.48 +14 14 01.0 18.4 c 704
2008-01-15 02:17:28 C 05 25 46.00 +14 13 47.7 18.9 c 704
2008-01-15 02:35:47 C 05 25 44.49 +14 13 35.7 19.1 c 704
2008-01-15 02:54:06 C 05 25 43.00 +14 13 21.8 18.8 c 704
2008-01-15 03:12:51 C 05 25 41.47 +14 13 08.2 18.8 c 704
2008-01-24 19:38:15 C 05 11 52.99 +11 49 19.5 r A78
2008-01-24 19:43:51 C 05 11 52.70 +11 49 16.3 r A78
2008-01-24 19:52:52 C 05 11 52.34 +11 49 12.0 r A78
2008-01-24 20:03:02 C 05 11 51.84 +11 49 07.1 r A78
2008-02-03 03:20:40 C 05 06 04.96 +10 14 13.9 r 703
2008-02-03 03:21:28 C 05 06 05.00 +10 14 13.5 r 703
2008-02-03 03:27:42 C 05 06 04.93 +10 14 11.0 r 703
2008-02-03 03:28:28 C 05 06 04.86 +10 14 11.1 r 703
2008-02-03 03:44:07 C 05 06 04.64 +10 14 06.4 r 703
2008-02-03 03:44:53 C 05 06 04.57 +10 14 05.3 r 703
2008-02-03 03:55:41 C 05 06 04.46 +10 14 02.1 r 703
2008-02-03 03:56:27 C 05 06 04.42 +10 14 02.2 r 703
2008-02-29 04:12:44 C 05 18 55.35 +08 21 03.8 20.6 c 704
2008-02-29 04:28:46 C 05 18 56.05 +08 21 02.1 20.2 c 704