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
2016-05-22 08:28:23 C 18 51 05.58 +35 00 27.2 u H21
2016-05-22 08:37:42 C 18 51 05.26 +35 00 31.5 u H21
2016-05-24 08:42:00 C 18 49 25.74 +35 24 20.5 u H21
2016-05-24 08:47:41 C 18 49 25.54 +35 24 23.4 u H21
2016-05-24 08:55:58 C 18 49 25.23 +35 24 27.5 u H21
2016-06-08 09:02:19 C 18 33 01.18 +37 37 19.0 q G96
2016-06-08 09:10:22 C 18 33 00.80 +37 37 20.6 q G96
2016-06-08 09:18:20 C 18 33 00.34 +37 37 22.5 q G96
2016-06-08 09:26:19 C 18 32 59.88 +37 37 24.5 q G96
2016-06-15 08:41:01 C 18 23 30.26 +38 05 47.9 u H21
2016-06-15 08:44:07 C 18 23 30.07 +38 05 48.1 u H21
2016-06-15 08:47:13 C 18 23 29.87 +38 05 48.7 u H21
2016-06-15 08:51:59 C 18 23 29.61 +38 05 49.0 u H21
2016-06-16 08:06:25 C 18 22 06.87 +38 07 52.6 q H21
2016-06-16 08:21:05 C 18 22 06.01 +38 07 53.5 q H21
2016-06-17 07:40:58 C 18 20 42.34 +38 09 27.4 u H21
2016-06-17 07:48:50 C 18 20 41.85 +38 09 27.7 u H21
2016-06-17 07:54:45 C 18 20 41.51 +38 09 27.9 u H21
2016-06-18 05:15:34 C 18 19 24.60 +38 10 29.2 u H21
2016-06-18 05:27:23 C 18 19 23.90 +38 10 30.0 u H21
2016-06-18 05:36:48 C 18 19 23.30 +38 10 30.2 u H21
2016-06-18 05:45:36 C 18 19 22.77 +38 10 30.6 u H21
2016-06-20 05:54:12 C 18 16 27.38 +38 11 16.5 u H21
2016-06-20 06:03:01 C 18 16 26.82 +38 11 16.6 u H21
2016-06-20 06:10:22 C 18 16 26.38 +38 11 16.6 u H21
2016-06-20 06:19:40 C 18 16 25.80 +38 11 16.4 u H21
2016-07-17 04:00:08 C 17 39 46.78 +35 03 38.5 u H21
2016-07-17 04:10:12 C 17 39 46.28 +35 03 32.7 u H21
2016-07-17 04:20:48 C 17 39 45.82 +35 03 26.9 u H21
2016-07-19 02:43:09 C 17 37 42.01 +34 37 14.4 u H21
2016-07-19 02:53:37 C 17 37 41.53 +34 37 08.2 u H21
2016-07-19 03:05:12 C 17 37 40.94 +34 37 01.7 u H21
2016-08-30 07:23:23 C 17 23 30.117 +21 37 55.98 L F51
2016-08-30 07:42:21 C 17 23 30.356 +21 37 40.14 L F51
2016-08-30 08:01:18 C 17 23 30.616 +21 37 24.11 L F51
2018-04-10 10:55:43 C 18 20 13.73 +26 23 38.5 U G96
2018-04-10 11:02:34 C 18 20 13.78 +26 23 43.7 U G96
2018-04-10 11:09:27 C 18 20 13.91 +26 23 48.6 U G96
2018-04-10 11:16:19 C 18 20 14.01 +26 23 55.3 U G96
2018-05-25 08:45:19 C 17 58 28.40 +38 14 12.0 U G96
2018-05-25 08:52:51 C 17 58 28.03 +38 14 14.6 U G96
2018-05-25 09:03:18 C 17 58 27.47 +38 14 19.4 U G96
2018-05-25 09:10:52 C 17 58 27.04 +38 14 21.9 U G96
2018-06-05 10:41:32 C 17 43 24.710 +39 26 58.43 U F52
2018-06-05 10:56:02 C 17 43 23.788 +39 27 00.68 U F52
2018-06-05 11:10:39 C 17 43 22.909 +39 27 02.86 U F52
2018-06-06 07:48:30 C 17 42 07.77 +39 30 05.5 U G96
2018-06-06 07:55:59 C 17 42 07.29 +39 30 08.0 U G96
2018-06-06 08:03:27 C 17 42 06.81 +39 30 07.7 U G96
2018-06-06 08:10:56 C 17 42 06.35 +39 30 08.7 U G96