4257 Ubasti (1987 QA)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4683594313 ± 4.35e-09
Semi-major axis (a)1.6471372987 AU ± 3.96e-10
Inclination (i)40.72180734° ± 5.74e-07
Long. of Asc. Node (Ω)169.14106442° ± 8.38e-07
Arg. of Perihelion (ω)278.95769231° ± 8.58e-07
Mean Anomaly (M)347.42839566° ± 6.71e-07
Mean Motion (n)0.4662486353°/day ± 1.68e-10
Perihelion dist (q)0.87568501 AU ± 7.17e-09
Aphelion dist (Q)2.41858959 AU ± 7.19e-09
Orbital Period2.11394996 yr ± 7.62e-10
Physical Parameters
H (abs. magnitude)15.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.081″
Uncertainty0
Orbit TypeApollo
MOID0.169642 AU
Observations Used2750
Gaia Obs Used109
Oppositions15
Arc Total1987-2026
First Observation Used1987-08-23
Last Observation Used2026-04-08
Observations (2997)
Date Type RA Dec Mag Band Observatory
2010-07-01 08:46:42 C 20 58 34.94 +32 11 29.6 o H21
2010-07-01 08:54:29 C 20 58 34.68 +32 11 31.6 o H21
2010-07-20 21:02:45 C 20 36 32.86 +32 27 37.6 u 240
2010-07-20 21:13:41 C 20 36 32.11 +32 27 35.0 u 240
2010-07-20 21:24:37 C 20 36 31.54 +32 27 32.8 u 240
2010-08-24 21:50:23 C 19 43 58.77 +22 37 34.3 u 160
2010-08-24 21:51:46 C 19 43 58.71 +22 37 32.7 u 160
2010-08-24 21:53:27 C 19 43 58.63 +22 37 30.9 u 160
2010-08-25 22:30:11 C 19 42 46.11 +22 08 10.8 u 160
2010-08-25 22:32:58 C 19 42 45.95 +22 08 07.3 u 160
2010-08-25 22:35:59 C 19 42 45.84 +22 08 02.7 u 160
2010-08-29 21:49:00 C 19 38 28.28 +20 10 08.9 u 160
2010-08-29 21:51:35 C 19 38 28.18 +20 10 06.0 u 160
2010-08-29 21:55:02 C 19 38 28.02 +20 10 01.7 u 160
2010-08-30 22:41:10 C 19 37 27.18 +19 38 18.8 u 160
2010-08-30 22:45:08 C 19 37 27.00 +19 38 14.0 u 160
2010-08-30 22:49:03 C 19 37 26.86 +19 38 09.1 u 160
2010-08-31 21:45:10 C 19 36 33.06 +19 08 27.6 u 160
2010-08-31 21:48:07 C 19 36 32.95 +19 08 23.4 u 160
2010-08-31 21:51:05 C 19 36 32.84 +19 08 19.2 u 160
2010-11-30 01:44:07 C 20 54 30.96 -19 02 48.8 r 703
2010-11-30 01:53:08 C 20 54 31.64 -19 02 52.9 r 703
2010-11-30 02:02:17 C 20 54 32.47 -19 02 59.6 r 703
2010-11-30 02:11:25 C 20 54 33.37 -19 03 03.8 r 703
2011-05-13 03:48:52 C 08 08 55.42 +21 10 47.1 r G96
2011-05-13 04:02:16 C 08 08 57.87 +21 10 57.3 r G96
2011-05-13 04:15:44 C 08 09 00.39 +21 11 07.2 r G96
2011-05-25 03:51:09 C 08 59 38.72 +23 52 14.7 r 703
2011-05-25 04:02:33 C 08 59 40.48 +23 52 18.5 r 703
2011-05-25 04:14:00 C 08 59 42.39 +23 52 23.2 r 703
2011-06-09 03:48:23 C 09 54 42.51 +25 05 52.0 r 703
2011-06-09 03:55:47 C 09 54 43.63 +25 05 53.7 r 703
2011-06-09 04:03:22 C 09 54 44.56 +25 05 54.2 r 703
2011-06-09 04:10:55 C 09 54 45.72 +25 05 54.8 r 703
2012-08-01 03:40:51 C 19 09 11.95 +31 21 01.4 u H21
2012-08-01 03:51:14 C 19 09 11.35 +31 20 54.6 u H21
2012-08-01 04:01:23 C 19 09 10.72 +31 20 47.9 u H21
2012-08-02 04:23:10 C 19 07 47.58 +31 04 29.8 u H21
2012-08-02 04:28:49 C 19 07 47.30 +31 04 26.2 u H21
2012-08-02 04:35:17 C 19 07 46.91 +31 04 21.5 u H21
2012-08-03 23:21:55 C 19 05 24.44 +30 34 26.0 v I93
2012-08-03 23:31:05 C 19 05 23.94 +30 34 19.0 v I93
2012-08-04 00:06:59 C 19 05 21.94 +30 33 53.2 v I93
2014-06-26 08:25:58 C 19 03 30.65 +36 36 32.8 u H21
2014-06-26 08:32:32 C 19 03 30.28 +36 36 32.9 u H21
2014-06-26 08:38:54 C 19 03 29.89 +36 36 32.9 u H21
2014-06-26 08:45:16 C 19 03 29.48 +36 36 33.2 u H21
2016-05-22 07:56:08 C 18 51 06.67 +35 00 10.5 u H21
2016-05-22 08:07:28 C 18 51 06.30 +35 00 16.5 u H21
2016-05-22 08:18:48 C 18 51 05.91 +35 00 22.1 u H21