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
2025-08-16 22:45:57 B 23 36 48.46 +20 26 21.3 X L76
2025-08-16 22:52:07 B 23 36 48.40 +20 26 15.0 X L76
2025-08-16 22:58:18 B 23 36 48.34 +20 26 08.4 X L76
2025-08-16 23:04:28 B 23 36 48.30 +20 26 02.3 X L76
2025-08-17 21:15:18 B 23 36 39.53 +20 02 25.0 X L76
2025-08-17 21:20:27 B 23 36 39.48 +20 02 19.3 X L76
2025-08-17 21:25:35 B 23 36 39.43 +20 02 13.9 X L76
2025-08-17 21:30:44 B 23 36 39.37 +20 02 08.1 X L76
2025-08-17 21:35:53 B 23 36 39.33 +20 02 02.6 X L76
2025-08-17 21:41:02 B 23 36 39.25 +20 01 56.7 X L76
2025-08-19 22:28:14 B 23 36 11.54 +19 04 50.8 X L76
2025-08-19 22:38:29 B 23 36 11.38 +19 04 37.9 X L76
2025-08-19 22:48:46 B 23 36 11.24 +19 04 25.1 X L76
2025-08-21 18:49:52 C 23 35 36.76 +18 06 21.6 V D29
2025-08-21 19:10:14 C 23 35 36.39 +18 05 53.1 V D29
2025-08-21 19:30:36 C 23 35 36.02 +18 05 24.5 V D29
2025-08-22 03:09:07 C 23 35 29.422 +17 54 39.28 V R17
2025-08-22 03:31:22 C 23 35 28.994 +17 54 07.45 V R17
2025-08-22 03:55:34 C 23 35 28.534 +17 53 32.89 V R17
2025-08-22 04:17:05 C 23 35 28.118 +17 53 01.97 V R17
2025-08-22 07:15:57 B 23 35 26.184 +17 48 43.49 V U62
2025-08-22 07:34:35 B 23 35 25.855 +17 48 17.03 V U62
2025-08-22 07:48:44 B 23 35 25.591 +17 47 56.76 V U62
2025-08-22 11:25:18 C 23 35 21.919 +17 42 46.94 V T05
2025-08-22 12:11:37 C 23 35 20.971 +17 41 39.44 V T05
2025-08-22 13:04:35 C 23 35 19.927 +17 40 22.94 V T05
2025-08-22 13:44:14 C 23 35 19.109 +17 39 23.90 V T05
2025-08-23 08:13:03 C 23 35 00.992 +17 11 41.86 V 703
2025-08-23 08:16:01 C 23 35 00.920 +17 11 37.32 V 703
2025-08-23 08:18:58 C 23 35 00.848 +17 11 32.96 V 703
2025-08-23 08:21:55 C 23 35 00.794 +17 11 28.32 V 703
2025-08-23 12:55:46 C 23 34 55.519 +17 04 29.60 V T08
2025-08-23 13:09:48 C 23 34 55.214 +17 04 07.75 V T08
2025-08-23 13:24:00 C 23 34 54.902 +17 03 45.61 V T08
2025-08-23 13:38:58 C 23 34 54.574 +17 03 22.32 V T08
2025-08-23 21:57:48 B 23 34 46.279 +16 50 12.29 W G34
2025-08-23 22:01:16 B 23 34 46.196 +16 50 06.87 W G34
2025-08-23 22:05:58 B 23 34 46.103 +16 49 59.44 W G34
2025-08-23 22:12:41 B 23 34 46.00 +16 49 51.2 V R99
2025-08-23 22:17:55 B 23 34 45.99 +16 49 41.9 V R99
2025-08-23 22:23:08 B 23 34 45.81 +16 49 34.9 V R99
2025-08-24 06:28:42 B 23 34 36.701 +16 36 37.55 V U62
2025-08-24 06:35:36 C 23 34 36.462 +16 36 27.97 V 703
2025-08-24 06:39:43 C 23 34 36.354 +16 36 21.49 V 703
2025-08-24 06:42:35 B 23 34 36.415 +16 36 15.59 V U62
2025-08-24 06:43:50 C 23 34 36.268 +16 36 14.54 V 703
2025-08-24 06:47:56 C 23 34 36.167 +16 36 07.96 V 703
2025-08-24 07:10:15 B 23 34 35.772 +16 35 30.95 V U62
2025-08-24 22:03:33 C 23 34 17.839 +16 10 53.29 Z C23
2025-08-24 22:34:33 C 23 34 17.078 +16 10 01.85 Z C23