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
2025-09-05 21:44:25 C 23 24 43.93 +04 47 49.1 X C40
2025-09-05 21:46:50 C 23 24 43.81 +04 47 41.4 X C40
2025-09-05 21:47:55 C 23 24 44.323 +04 47 36.92 V D76
2025-09-05 21:49:14 C 23 24 43.69 +04 47 33.8 X C40
2025-09-05 21:51:40 C 23 24 43.57 +04 47 26.1 X C40
2025-09-05 21:54:04 C 23 24 43.44 +04 47 18.5 X C40
2025-09-05 21:54:44 C 23 24 44.002 +04 47 15.18 V D76
2025-09-05 21:56:29 C 23 24 43.32 +04 47 10.8 X C40
2025-09-05 21:58:53 C 23 24 43.20 +04 47 03.2 X C40
2025-09-05 22:01:12 C 23 24 43.08 +04 46 55.7 X C40
2025-09-05 22:03:25 C 23 24 42.98 +04 46 48.7 X C40
2025-09-05 22:03:43 B 23 24 43.459 +04 46 47.50 W D38
2025-09-05 22:05:37 C 23 24 42.86 +04 46 41.8 X C40
2025-09-05 22:07:48 C 23 24 42.75 +04 46 34.7 X C40
2025-09-05 22:09:58 B 23 24 43.145 +04 46 27.59 W D38
2025-09-05 22:11:59 C 23 24 43.020 +04 46 19.67 Z C23
2025-09-05 22:16:36 B 23 24 42.799 +04 46 06.74 W D38
2025-09-05 23:08:04 B 23 24 40.166 +04 43 21.04 V L65
2025-09-05 23:12:15 B 23 24 39.958 +04 43 07.72 V L65
2025-09-05 23:16:26 B 23 24 39.749 +04 42 54.43 V L65
2025-09-06 05:23:04 C 23 24 21.463 +04 23 26.77 V R17
2025-09-06 05:29:44 C 23 24 21.127 +04 23 05.28 V R17
2025-09-06 05:34:47 C 23 24 20.882 +04 22 48.90 V R17
2025-09-06 05:40:40 C 23 24 20.590 +04 22 29.96 V R17
2025-09-06 22:07:45 B 23 23 34.743 +03 28 32.42 W G34
2025-09-06 22:15:14 B 23 23 34.290 +03 28 06.99 W G34
2025-09-06 22:20:51 B 23 23 34.029 +03 27 48.52 W G34
2025-09-06 23:03:04 B 23 23 31.882 +03 25 27.08 V L65
2025-09-06 23:07:15 B 23 23 31.654 +03 25 13.08 V L65
2025-09-06 23:11:26 B 23 23 31.418 +03 24 59.47 V L65
2025-09-09 04:54:24 B 23 20 46.00 +00 16 57.7 Z W37
2025-09-09 05:27:04 B 23 20 44.06 +00 14 57.5 Z W37
2025-09-09 05:58:30 B 23 20 42.20 +00 13 01.9 Z W37
2025-09-09 20:46:50 C 23 19 54.372 -00 42 07.70 Z C23
2025-09-09 21:00:52 C 23 19 53.590 -00 43 01.20 Z C23
2025-09-09 21:29:26 C 23 19 51.847 -00 44 49.13 Z C23
2025-09-10 04:26:27 B 23 19 28.36 -01 11 09.1 Z W37
2025-09-10 04:56:04 B 23 19 26.50 -01 13 02.8 Z W37
2025-09-10 05:24:53 B 23 19 24.71 -01 14 53.3 Z W37
2025-09-10 21:04:51 B 23 18 31.28 -02 15 35.0 X L99
2025-09-10 21:05:51 B 23 18 31.27 -02 15 39.4 X L99
2025-09-10 21:06:51 B 23 18 31.24 -02 15 43.1 X L99
2025-09-10 21:07:51 B 23 18 31.19 -02 15 47.1 X L99
2025-09-10 21:08:51 B 23 18 31.07 -02 15 51.6 X L99
2025-09-10 23:07:05 B 23 18 24.118 -02 23 36.13 V L65
2025-09-10 23:11:16 B 23 18 23.858 -02 23 52.62 V L65
2025-09-10 23:15:27 B 23 18 23.599 -02 24 09.14 V L65
2025-09-11 03:51:14 C 23 18 06.602 -02 42 10.87 V R17
2025-09-11 04:11:36 C 23 18 05.333 -02 43 31.40 V R17
2025-09-11 04:31:49 C 23 18 04.068 -02 44 51.68 V R17