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
2024-02-28 13:45:21 C 15 46 00.614 +10 41 42.04 V T05
2024-02-28 13:47:58 C 15 46 00.737 +10 41 46.36 V T05
2024-02-28 13:49:55 C 15 46 00.792 +10 41 50.06 V T05
2024-02-28 13:52:31 C 15 46 00.871 +10 41 54.38 V T05
2024-02-28 14:10:07 C 15 46 01.366 +10 42 26.14 V T05
2024-02-29 01:13:18 C 15 46 22.186 +11 02 20.83 V M22
2024-02-29 01:17:52 C 15 46 22.279 +11 02 29.54 V M22
2024-02-29 01:25:46 C 15 46 22.512 +11 02 42.94 V M22
2024-02-29 01:48:45 C 15 46 23.194 +11 03 24.26 V M22
2024-03-12 11:40:40 C 15 51 35.824 +20 02 25.58 V 703
2024-03-12 11:43:56 C 15 51 35.860 +20 02 31.74 V 703
2024-03-12 11:47:19 C 15 51 35.849 +20 02 37.61 V 703
2024-03-12 11:50:34 C 15 51 35.856 +20 02 43.22 V 703
2024-03-13 12:01:56 C 15 51 39.474 +20 46 11.50 V 703
2024-03-13 12:05:23 C 15 51 39.496 +20 46 17.40 V 703
2024-03-13 12:08:47 C 15 51 39.474 +20 46 23.20 V 703
2024-03-13 12:12:10 C 15 51 39.474 +20 46 30.07 V 703
2024-03-13 14:53:46 C 15 51 39.720 +20 51 21.28 V T05
2024-03-13 14:58:12 C 15 51 39.696 +20 51 29.48 V T05
2024-03-13 15:10:21 C 15 51 39.696 +20 51 51.30 V T05
2024-03-13 15:19:51 C 15 51 39.674 +20 52 08.11 V T05
2024-03-13 15:39:02 C 15 51 39.624 +20 52 42.42 V T05
2024-03-15 13:06:23 C 15 51 36.744 +22 13 45.88 V T08
2024-03-15 13:09:03 C 15 51 36.708 +22 13 50.41 V T08
2024-03-15 13:13:44 C 15 51 36.679 +22 13 58.98 V T08
2024-03-15 13:21:36 C 15 51 36.648 +22 14 12.95 V T08
2024-03-16 13:16:52 C 15 51 30.019 +22 56 30.77 V T05
2024-03-16 13:24:15 C 15 51 29.957 +22 56 44.02 V T05
2024-03-16 15:41:30 C 15 51 28.762 +23 00 45.54 V T05
2024-03-17 12:32:20 C 15 51 20.486 +23 37 21.29 V T05
2024-03-17 12:36:54 C 15 51 20.434 +23 37 29.64 V T05
2024-03-17 12:41:27 C 15 51 20.393 +23 37 37.31 V T05
2024-03-17 12:49:18 C 15 51 20.309 +23 37 51.28 V T05
2024-03-18 10:55:33 C 15 51 07.924 +24 16 22.44 V 703
2024-03-18 10:58:31 C 15 51 07.909 +24 16 27.44 V 703
2024-03-18 11:01:29 C 15 51 07.859 +24 16 32.99 V 703
2024-03-18 11:04:32 C 15 51 07.801 +24 16 38.28 V 703
2024-03-18 11:33:13 C 15 51 07.920 +24 17 28.93 V T08
2024-03-18 11:37:12 C 15 51 07.860 +24 17 36.10 V T08
2024-03-18 11:41:12 C 15 51 07.814 +24 17 43.33 V T08
2024-03-18 11:48:31 C 15 51 07.730 +24 17 56.00 V T08
2024-03-19 12:15:18 C 15 50 50.712 +25 00 12.49 V T08
2024-03-19 12:17:57 C 15 50 50.678 +25 00 17.35 V T08
2024-03-19 12:21:57 C 15 50 50.626 +25 00 23.80 V T08
2024-03-19 12:32:33 C 15 50 50.467 +25 00 42.55 V T08
2024-03-19 12:37:13 C 15 50 50.388 +25 00 50.04 V T08
2024-03-19 12:39:52 C 15 50 50.330 +25 00 54.83 V T08
2024-03-19 12:43:52 C 15 50 50.306 +25 01 01.70 V T08
2024-03-19 12:51:21 C 15 50 50.198 +25 01 14.81 V T08
2024-03-20 10:40:30 C 15 50 31.812 +25 38 35.95 V 703