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
2021-01-05 10:51:11 C 04 58 35.059 +19 17 41.81 U F52
2021-01-07 08:13:03 C 04 55 10.64 +18 37 06.4 V T08
2021-01-07 08:19:02 C 04 55 10.14 +18 37 01.0 V T08
2021-01-07 08:26:24 C 04 55 09.58 +18 36 54.5 V T08
2021-01-07 08:41:22 C 04 55 08.44 +18 36 41.5 V T08
2021-01-09 07:14:10 C 04 51 58.50 +17 56 51.5 V G96
2021-01-09 07:21:40 C 04 51 57.99 +17 56 45.1 V G96
2021-01-09 07:29:09 C 04 51 57.48 +17 56 38.7 V G96
2021-01-09 07:36:39 C 04 51 56.98 +17 56 32.4 V G96
2021-01-09 09:51:11 C 04 51 48.510 +17 54 44.83 U F52
2021-01-09 10:07:03 C 04 51 47.428 +17 54 31.44 U F52
2021-01-09 10:22:56 C 04 51 46.352 +17 54 18.12 U F52
2021-01-10 06:00:23 C 04 50 33.79 +17 38 09.5 V 703
2021-01-10 06:07:56 C 04 50 33.28 +17 38 03.6 V 703
2021-01-10 06:15:29 C 04 50 32.77 +17 37 57.5 V 703
2021-01-10 06:23:02 C 04 50 32.27 +17 37 50.7 V 703
2021-01-12 19:38:39 C 04 47 09.11 +16 49 57.6 V 130
2021-01-12 19:42:14 C 04 47 08.91 +16 49 55.0 V 130
2021-01-12 19:45:49 C 04 47 08.71 +16 49 53.0 V 130
2021-01-13 09:14:27 C 04 46 28.08 +16 39 57.9 V T05
2021-01-13 09:19:05 C 04 46 27.80 +16 39 54.3 V T05
2021-01-13 09:44:14 C 04 46 26.46 +16 39 35.6 V T05
2021-01-13 10:09:40 C 04 46 25.15 +16 39 16.4 V T05
2021-01-14 09:22:01 C 04 45 20.601 +16 22 27.91 U F51
2021-01-14 09:38:56 C 04 45 19.779 +16 22 15.80 U F51
2021-01-14 09:55:42 C 04 45 18.955 +16 22 03.51 U F51
2021-01-14 10:12:30 C 04 45 18.141 +16 21 51.42 U F51
2021-01-15 12:43:37 C 04 44 11.30 +16 03 16.1 q D29
2021-01-15 13:03:59 C 04 44 10.43 +16 03 02.1 q D29
2021-01-15 13:24:21 C 04 44 09.52 +16 02 48.1 q D29
2021-01-17 07:40:38 C 04 42 35.09 +15 34 46.3 V T05
2021-01-17 07:45:15 C 04 42 34.83 +15 34 43.3 V T05
2021-01-17 07:53:08 C 04 42 34.54 +15 34 37.5 V T05
2021-01-17 08:08:09 C 04 42 33.96 +15 34 28.3 V T05
2021-01-18 01:48:20 C 04 42 00.08 +15 23 10.0 V G96
2021-01-18 02:04:36 C 04 41 59.50 +15 23 01.2 V G96
2021-01-18 02:12:44 C 04 41 59.22 +15 22 56.1 V G96
2021-01-18 06:02:25 C 04 41 51.25 +15 20 33.5 V 703
2021-01-18 06:10:26 C 04 41 50.85 +15 20 27.5 V 703
2021-01-18 06:18:27 C 04 41 50.58 +15 20 23.0 V 703
2021-01-18 06:26:27 C 04 41 50.28 +15 20 17.6 V 703
2021-01-18 11:56:55 C 04 41 41.03 +15 16 53.4 q D29
2021-01-18 12:17:17 C 04 41 40.33 +15 16 40.9 q D29
2021-01-18 12:37:39 C 04 41 39.65 +15 16 28.5 q D29
2021-02-07 04:49:49 C 04 41 13.34 +11 58 40.9 V 654
2021-02-07 05:51:26 C 04 41 14.61 +11 58 24.9 V 654
2021-10-28 06:45:23 C 20 12 40.39 +13 59 32.9 V T05
2021-10-28 06:50:42 C 20 12 41.46 +13 59 33.4 V T05
2021-10-28 06:58:39 C 20 12 43.17 +13 59 33.3 V T05
2021-10-28 07:13:50 C 20 12 46.35 +13 59 33.4 V T05