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
2025-08-24 22:35:42 C 23 34 17.102 +16 09 59.47 Z C23
2025-08-25 00:10:03 C 23 34 15.022 +16 07 23.48 Z R60
2025-08-25 00:13:05 C 23 34 14.945 +16 07 19.56 Z R60
2025-08-25 00:16:05 C 23 34 14.868 +16 07 13.84 Z R60
2025-08-25 00:35:05 B 23 34 14.203 +16 06 38.81 V L65
2025-08-25 00:39:16 B 23 34 14.081 +16 06 31.21 V L65
2025-08-25 00:43:26 B 23 34 14.050 +16 06 24.05 V L65
2025-08-25 09:17:39 C 23 34 02.953 +15 51 50.98 V 703
2025-08-25 09:20:57 C 23 34 02.867 +15 51 45.50 V 703
2025-08-25 09:24:15 C 23 34 02.766 +15 51 39.74 V 703
2025-08-25 09:27:33 C 23 34 02.694 +15 51 33.95 V 703
2025-08-25 21:51:10 C 23 33 46.853 +15 29 45.60 Z C23
2025-08-25 22:07:12 C 23 33 46.478 +15 29 17.05 Z C23
2025-08-25 22:08:25 C 23 33 46.490 +15 29 14.53 Z C23
2025-08-26 00:26:35 C 23 33 43.085 +15 25 11.68 Z R60
2025-08-26 00:29:36 C 23 33 43.013 +15 25 06.49 Z R60
2025-08-26 00:32:36 C 23 33 42.929 +15 25 01.42 Z R60
2025-08-26 00:35:36 C 23 33 42.828 +15 24 56.56 Z R60
2025-08-26 00:38:38 C 23 33 42.770 +15 24 51.01 Z R60
2025-08-26 10:30:56 C 23 33 29.081 +15 07 01.96 V T05
2025-08-26 10:46:09 C 23 33 28.649 +15 06 34.20 V T05
2025-08-26 11:00:55 C 23 33 28.234 +15 06 07.16 V T05
2025-08-26 11:15:12 C 23 33 27.828 +15 05 41.03 V T05
2025-08-27 21:36:25 B 23 32 36.005 +13 59 51.65 V S47
2025-08-27 21:43:26 B 23 32 35.796 +13 59 37.86 V S47
2025-08-27 21:48:02 B 23 32 35.650 +13 59 28.64 V S47
2025-08-27 21:52:05 B 23 32 35.534 +13 59 20.58 V S47
2025-08-27 21:56:09 B 23 32 35.410 +13 59 12.52 V S47
2025-08-28 08:44:43 C 23 32 18.178 +13 37 29.55 X F52
2025-08-28 09:00:15 C 23 32 17.688 +13 36 58.03 X F52
2025-08-28 09:15:45 C 23 32 17.160 +13 36 26.98 X F52
2025-08-28 09:31:14 C 23 32 16.714 +13 35 54.91 X F52
2025-08-28 11:10:24 C 23 32 12.782 +13 32 27.92 V 703
2025-08-28 11:14:57 C 23 32 12.635 +13 32 18.42 V 703
2025-08-28 11:17:54 C 23 32 12.538 +13 32 12.19 V 703
2025-08-28 11:20:51 C 23 32 12.466 +13 32 06.18 V 703
2025-08-28 15:35:53 C 23 32 06.35 +13 23 20.0 V D29
2025-08-28 15:37:09 C 23 32 06.30 +13 23 17.4 V D29
2025-08-28 15:56:15 C 23 32 05.69 +13 22 37.8 V D29
2025-08-28 15:57:31 C 23 32 05.65 +13 22 35.2 V D29
2025-08-28 16:16:36 C 23 32 05.03 +13 21 55.6 V D29
2025-08-28 16:17:53 C 23 32 04.98 +13 21 53.0 V D29
2025-08-28 21:33:25 B 23 31 56.112 +13 10 49.84 V S47
2025-08-28 21:33:33 C 23 31 56.297 +13 10 47.24 Z C23
2025-08-28 21:39:31 B 23 31 55.915 +13 10 37.02 V S47
2025-08-28 21:45:38 B 23 31 55.718 +13 10 24.13 V S47
2025-08-28 21:51:14 B 23 31 55.538 +13 10 12.43 V S47
2025-08-28 21:53:09 C 23 31 55.685 +13 10 06.31 Z C23
2025-08-28 21:56:19 B 23 31 55.370 +13 10 01.67 V S47
2025-08-29 22:31:25 C 23 31 11.234 +12 17 07.48 V M22