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
2001-02-22 05:29:49 C 07 41 16.40 -25 01 12.8 926
2001-02-27 21:08:02 C 07 24 56.00 -25 19 38.0 118
2001-02-27 21:18:44 C 07 24 54.80 -25 19 39.0 118
2001-03-13 09:55:39 C 06 56 32.332 -24 42 44.45 422
2001-03-13 09:56:53 C 06 56 32.292 -24 42 44.04 422
2001-03-13 09:59:18 C 06 56 32.112 -24 42 43.34 422
2001-04-05 09:42:38 C 06 37 17.258 -22 13 25.49 413
2001-04-05 09:46:01 C 06 37 17.190 -22 13 24.45 413
2001-04-05 09:49:16 C 06 37 17.118 -22 13 23.53 413
2001-08-08 01:43:34 C 04 00 06.96 +46 48 32.5 20.0 c 493
2001-08-08 01:46:50 C 04 00 07.24 +46 48 34.0 c 493
2001-08-08 01:49:47 C 04 00 07.52 +46 48 36.0 c 493
2001-08-09 01:34:39 C 04 02 18.40 +47 00 25.1 20.0 c 493
2001-08-09 01:38:15 C 04 02 18.77 +47 00 26.2 c 493
2001-08-09 01:41:56 C 04 02 19.10 +47 00 29.0 c 493
2001-11-06 01:23:28 C 04 49 25.78 +51 02 13.4 c 118
2001-11-06 01:27:42 C 04 49 25.20 +51 02 11.1 c 118
2001-11-06 01:39:36 C 04 49 23.48 +51 02 03.5 c 118
2001-11-12 00:41:11 C 04 28 12.97 +49 08 43.2 c 198
2001-11-12 00:47:50 C 04 28 11.88 +49 08 37.0 c 198
2001-11-12 01:04:09 C 04 28 09.29 +49 08 21.6 c 198
2001-11-16 09:26:39 C 04 12 11.67 +47 16 22.8 c 670
2001-11-24 06:41:42 C 03 45 11.94 +42 57 07.4 c 670
2001-11-24 08:41:47 C 03 44 55.43 +42 54 03.7 c 670
2001-12-02 23:13:24 C 03 21 50.49 +37 22 37.5 c 118
2001-12-02 23:20:04 C 03 21 49.89 +37 22 26.5 c 118
2001-12-08 19:56:02 C 03 10 47.67 +33 35 30.6 c 198
2001-12-08 20:16:39 C 03 10 46.26 +33 34 57.9 c 198
2001-12-08 20:31:04 C 03 10 45.28 +33 34 35.1 c 198
2001-12-08 20:38:17 C 03 10 44.78 +33 34 24.1 c 198
2001-12-08 20:59:21 C 03 10 43.35 +33 33 50.8 c 198
2001-12-09 05:39:05 C 03 10 09.56 +33 20 20.3 18.8 c 704
2001-12-09 06:00:38 C 03 10 08.04 +33 19 46.5 19.1 c 704
2001-12-09 06:22:12 C 03 10 06.45 +33 19 12.4 19.5 c 704
2001-12-09 06:43:46 C 03 10 05.06 +33 18 38.5 19.2 c 704
2001-12-09 07:05:19 C 03 10 03.58 +33 18 03.7 18.9 c 704
2001-12-14 05:24:18 C 03 03 51.59 +30 20 03.9 18.4 c 704
2001-12-14 05:46:25 C 03 03 50.50 +30 19 31.8 18.6 c 704
2001-12-14 06:09:09 C 03 03 49.46 +30 18 58.9 18.8 c 704
2001-12-14 06:31:22 C 03 03 48.47 +30 18 26.4 18.8 c 704
2001-12-14 06:53:20 C 03 03 47.35 +30 17 55.0 18.6 c 704
2001-12-14 18:43:14 C 03 03 19.66 +30 00 55.1 c 198
2001-12-14 18:52:12 C 03 03 19.30 +30 00 42.7 c 198
2001-12-14 19:13:50 C 03 03 18.37 +30 00 12.1 c 198
2001-12-15 21:10:02 C 03 02 19.26 +29 23 46.1 c 118
2001-12-15 21:28:42 C 03 02 18.48 +29 23 22.0 c 118
2002-01-09 04:35:04 C 03 03 43.74 +19 47 45.3 19.8 c 704
2002-01-09 04:57:39 C 03 03 44.33 +19 47 31.8 19.9 c 704
2002-01-09 05:20:13 C 03 03 44.98 +19 47 17.9 19.9 c 704
2002-01-09 05:42:47 C 03 03 45.68 +19 47 04.3 19.8 c 704