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
2008-08-01 00:29:46 C 21 53 24.46 +28 43 47.3 c B37
2008-08-01 00:42:35 C 21 53 23.81 +28 43 43.3 c B37
2008-08-01 00:54:31 C 21 53 23.20 +28 43 39.0 c B37
2008-08-04 02:30:54 C 21 49 36.42 +28 14 55.2 c B37
2008-08-04 02:31:48 C 21 49 36.35 +28 14 54.9 c B37
2008-08-04 02:32:41 C 21 49 36.32 +28 14 54.7 c B37
2008-08-04 02:58:31 C 21 49 34.88 +28 14 43.0 c B37
2008-08-04 03:00:19 C 21 49 34.81 +28 14 42.2 c B37
2008-08-04 03:01:13 C 21 49 34.67 +28 14 42.0 c B37
2008-08-10 00:09:44 C 21 41 19.88 +26 55 44.1 c J27
2008-08-10 00:29:16 C 21 41 18.59 +26 55 31.0 c J27
2008-08-10 00:44:17 C 21 41 17.57 +26 55 20.2 c J27
2008-08-10 20:48:40 C 21 40 01.58 +26 41 18.0 r 106
2008-08-10 21:02:29 C 21 40 00.64 +26 41 08.4 r 106
2008-08-10 21:16:18 C 21 39 59.72 +26 40 58.4 r 106
2008-08-10 21:30:10 C 21 39 58.83 +26 40 48.5 r 106
2008-08-10 21:41:55 C 21 39 58.04 +26 40 39.6 r 106
2008-08-10 21:55:45 C 21 39 57.13 +26 40 30.1 r 106
2008-08-10 22:09:33 C 21 39 56.22 +26 40 20.2 r 106
2008-08-10 22:23:24 C 21 39 55.33 +26 40 10.2 r 106
2008-08-11 21:48:21 C 21 38 24.83 +26 22 51.4 r J51
2008-08-11 22:29:14 C 21 38 22.08 +26 22 20.4 r J51
2008-08-11 23:10:07 C 21 38 19.35 +26 21 49.4 r J51
2008-08-12 23:29:11 C 21 36 42.72 +26 02 37.7 c B37
2008-08-12 23:30:34 C 21 36 42.66 +26 02 36.6 c B37
2008-08-12 23:32:27 C 21 36 42.43 +26 02 34.7 c B37
2008-08-16 23:59:40 C 21 30 04.36 +24 35 22.5 c B37
2008-08-17 00:05:30 C 21 30 03.96 +24 35 16.9 c B37
2008-08-17 00:06:02 C 21 30 03.91 +24 35 16.0 c B37
2008-08-17 00:11:02 C 21 30 03.56 +24 35 11.5 c B37
2008-08-17 00:11:45 C 21 30 03.49 +24 35 10.5 c B37
2008-08-17 00:13:04 C 21 30 03.63 +24 35 11.9 r J51
2008-08-17 00:21:48 C 21 30 02.98 +24 35 02.8 r J51
2008-08-17 00:30:33 C 21 30 02.33 +24 34 53.6 r J51
2008-08-18 20:57:21 C 21 26 51.78 +23 48 20.6 r 143
2008-08-18 21:00:08 C 21 26 51.57 +23 48 17.8 r 143
2008-08-18 21:03:03 C 21 26 51.37 +23 48 14.1 r 143
2008-08-29 20:26:33 C 21 07 19.39 +17 48 00.8 c B49
2008-08-29 20:34:37 C 21 07 18.72 +17 47 46.0 c B49
2008-08-30 00:22:26 C 21 07 01.27 +17 41 31.5 c B37
2008-08-30 00:23:16 C 21 07 01.21 +17 41 30.4 c B37
2008-08-30 00:24:06 C 21 07 01.12 +17 41 28.6 c B37
2008-08-30 00:29:01 C 21 07 00.68 +17 41 20.7 c B37
2008-08-30 00:29:50 C 21 07 00.67 +17 41 19.5 c B37
2008-08-30 21:48:51 C 21 05 27.26 +17 05 48.8 r J51
2008-08-30 21:58:36 C 21 05 26.52 +17 05 32.3 r J51
2008-08-30 22:08:21 C 21 05 25.80 +17 05 15.6 r J51
2008-09-08 03:42:13 C 20 51 40.85 +10 57 33.0 o H47
2008-09-08 03:49:59 C 20 51 40.32 +10 57 17.4 o H47
2008-09-08 04:08:47 C 20 51 39.03 +10 56 39.9 o H47