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
2014-12-09 22:53:55 C 02 12 25.63 +30 44 56.5 q 160
2015-01-11 04:06:16 C 02 37 24.32 +19 00 49.9 q 703
2015-01-11 04:10:35 C 02 37 24.68 +19 00 47.8 q 703
2015-01-11 04:14:55 C 02 37 24.92 +19 00 46.2 q 703
2015-01-11 04:19:13 C 02 37 25.08 +19 00 45.4 q 703
2015-01-12 06:54:00 C 02 38 56.981 +18 48 59.41 L F51
2015-01-12 07:30:22 C 02 38 58.974 +18 48 43.44 L F51
2015-01-12 07:48:31 C 02 38 59.972 +18 48 35.46 L F51
2015-01-16 03:21:43 C 02 44 30.15 +18 12 18.0 R G45
2015-01-16 03:32:44 C 02 44 30.82 +18 12 13.5 R G45
2015-01-16 03:38:45 C 02 44 31.18 +18 12 11.5 R G45
2015-01-16 03:45:56 C 02 44 31.65 +18 12 08.6 R G45
2015-01-16 03:52:05 C 02 44 32.01 +18 12 06.9 R G45
2015-01-16 03:58:03 C 02 44 32.31 +18 12 04.2 R G45
2015-01-16 04:06:42 C 02 44 32.84 +18 12 01.1 R G45
2015-01-16 04:12:34 C 02 44 33.23 +18 11 59.2 R G45
2015-01-16 05:26:43 C 02 44 37.64 +18 11 31.4 R G45
2015-01-16 05:32:52 C 02 44 37.91 +18 11 28.2 R G45
2015-01-16 05:57:25 C 02 44 39.42 +18 11 19.8 R G45
2015-01-17 03:19:33 C 02 45 59.98 +18 03 50.6 R G45
2015-01-17 03:31:33 C 02 46 00.65 +18 03 46.2 R G45
2015-01-17 03:50:54 C 02 46 01.81 +18 03 39.7 R G45
2015-01-17 04:05:24 C 02 46 02.67 +18 03 34.3 R G45
2015-01-17 04:11:34 C 02 46 03.04 +18 03 33.0 R G45
2015-01-19 03:27:46 C 02 49 04.00 +17 48 03.6 R G45
2015-01-19 03:34:43 C 02 49 04.47 +17 48 00.7 R G45
2015-01-19 03:40:58 C 02 49 04.84 +17 47 59.2 R G45
2015-01-19 05:23:12 C 02 49 11.27 +17 47 26.3 R G45
2015-01-19 05:35:44 C 02 49 12.02 +17 47 23.1 R G45
2015-01-19 05:41:35 C 02 49 12.40 +17 47 20.4 R G45
2015-02-01 06:42:22 C 03 11 06.179 +16 37 36.98 L F51
2015-02-01 07:21:53 C 03 11 09.041 +16 37 30.68 L F51
2015-02-01 07:41:57 C 03 11 10.485 +16 37 27.46 L F51
2019-11-08 14:15:25 C 09 43 48.767 +10 59 33.85 U F51
2019-11-08 14:33:22 C 09 43 50.271 +10 59 18.47 U F51
2019-11-08 14:38:54 C 09 43 50.764 +10 59 14.06 U F51
2019-11-08 14:51:21 C 09 43 51.784 +10 59 03.31 U F51
2019-11-08 14:56:55 C 09 43 52.251 +10 58 58.46 U F51
2019-11-08 15:09:24 C 09 43 53.274 +10 58 47.92 U F51
2019-11-08 15:14:56 C 09 43 53.738 +10 58 43.44 U F51
2020-01-20 13:46:52 C 11 52 16.074 -25 59 53.74 U F51
2020-01-20 14:01:38 C 11 52 16.983 -26 00 21.90 U F51
2020-01-20 14:16:25 C 11 52 17.890 -26 00 49.97 U F51
2020-01-20 14:31:11 C 11 52 18.797 -26 01 18.15 U F51
2020-01-27 12:55:18 C 12 03 31.08 -31 32 19.7 V T08
2020-01-27 12:59:59 C 12 03 31.44 -31 32 28.7 V T08
2020-01-27 13:09:17 C 12 03 32.04 -31 32 48.4 V T08
2020-01-27 13:23:53 C 12 03 33.07 -31 33 19.4 V T08
2020-01-29 12:26:37 C 12 06 48.00 -33 12 30.6 V T05
2020-01-29 12:30:38 C 12 06 48.20 -33 12 39.5 V T05