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
2026-03-13 21:15:53 B 13 32 21.744 +20 17 44.45 X L99
2026-03-13 22:40:36 B 13 32 14.73 +20 23 26.0 X L76
2026-03-13 22:47:24 B 13 32 14.17 +20 23 53.3 X L76
2026-03-13 22:53:56 B 13 32 13.64 +20 24 19.3 X L76
2026-03-13 23:00:11 B 13 32 13.12 +20 24 44.4 X L76
2026-03-13 23:06:26 B 13 32 12.60 +20 25 09.3 X L76
2026-03-15 00:07:37 C 13 30 15.22 +22 02 58.1 X C40
2026-03-15 00:09:34 C 13 30 15.06 +22 03 05.4 X C40
2026-03-15 00:11:30 C 13 30 14.90 +22 03 12.8 X C40
2026-03-15 00:16:59 C 13 30 14.43 +22 03 33.6 X C40
2026-03-15 00:18:42 C 13 30 14.29 +22 03 40.0 X C40
2026-03-15 00:20:26 C 13 30 14.14 +22 03 46.6 X C40
2026-03-15 00:27:17 C 13 30 13.58 +22 04 13.0 X C40
2026-03-15 21:24:41 B 13 28 35.515 +23 22 31.40 X L99
2026-03-15 21:27:50 B 13 28 35.244 +23 22 43.07 X L99
2026-03-15 21:30:59 B 13 28 34.927 +23 22 55.20 X L99
2026-03-15 21:34:08 B 13 28 34.663 +23 23 06.79 X L99
2026-03-15 21:37:17 B 13 28 34.474 +23 23 18.02 X L99
2026-03-16 12:56:10 C 13 27 19.972 +24 18 34.94 V U68
2026-03-16 13:00:59 C 13 27 19.573 +24 18 52.11 V U68
2026-03-17 10:19:16 C 13 25 38.165 +25 32 55.57 V 703
2026-03-17 10:22:33 C 13 25 37.880 +25 33 06.73 V 703
2026-03-17 10:25:49 C 13 25 37.607 +25 33 17.78 V 703
2026-03-17 10:29:06 C 13 25 37.319 +25 33 29.02 V 703
2026-03-17 20:49:36 C 13 24 49.130 +26 08 02.69 Z C23
2026-03-17 21:00:29 C 13 24 48.192 +26 08 39.01 Z C23
2026-03-17 21:02:12 C 13 24 48.065 +26 08 45.02 Z C23
2026-03-18 09:02:09 C 13 23 49.333 +26 48 14.98 V 703
2026-03-18 09:05:30 C 13 23 49.034 +26 48 25.70 V 703
2026-03-18 09:08:47 C 13 23 48.750 +26 48 36.43 V 703
2026-03-18 09:12:04 C 13 23 48.476 +26 48 47.05 V 703
2026-03-18 23:55:03 B 13 22 37.798 +27 35 29.69 X L65
2026-03-18 23:59:11 B 13 22 37.471 +27 35 42.65 X L65
2026-03-19 00:03:20 B 13 22 37.106 +27 35 55.50 X L65
2026-03-19 07:25:19 C 13 22 01.976 +27 58 52.36 V U68
2026-03-19 07:30:07 C 13 22 01.551 +27 59 06.90 V U68
2026-03-19 07:58:15 C 13 21 59.136 +28 00 34.13 V U74
2026-03-19 08:00:25 C 13 21 58.962 +28 00 40.94 V U74
2026-03-19 09:38:28 C 13 21 50.283 +28 05 43.82 Z G82
2026-03-19 10:05:04 C 13 21 47.970 +28 07 05.45 V 703
2026-03-19 10:08:20 C 13 21 47.704 +28 07 14.70 V 703
2026-03-19 10:11:40 C 13 21 47.430 +28 07 25.43 V 703
2026-03-19 10:14:56 C 13 21 47.149 +28 07 35.36 V 703
2026-03-19 10:26:34 C 13 21 46.126 +28 08 10.73 Z G82
2026-03-19 11:04:03 C 13 21 42.910 +28 10 04.61 Z G82
2026-03-19 12:14:08 C 13 21 36.943 +28 13 36.60 Z G82
2026-03-20 09:06:19 C 13 19 57.032 +29 15 44.60 V 703
2026-03-20 09:09:36 C 13 19 56.755 +29 15 54.11 V 703
2026-03-20 09:12:54 C 13 19 56.474 +29 16 03.65 V 703
2026-03-20 09:16:11 C 13 19 56.176 +29 16 13.26 V 703