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
2026-03-07 20:39:40 C 13 42 59.393 +09 25 29.64 X L18
2026-03-07 20:40:43 C 13 42 59.323 +09 25 34.79 X L18
2026-03-07 20:41:47 C 13 42 59.225 +09 25 40.08 X L18
2026-03-07 23:58:29 C 13 42 44.99 +09 41 57.0 V M32
2026-03-08 00:00:19 C 13 42 44.85 +09 42 06.0 V M32
2026-03-08 00:02:08 C 13 42 44.74 +09 42 14.0 V M32
2026-03-08 00:03:59 C 13 42 44.58 +09 42 24.1 V M32
2026-03-08 00:06:10 C 13 42 44.41 +09 42 35.0 V M32
2026-03-08 22:34:12 B 13 41 10.850 +11 32 15.83 Z R92
2026-03-08 22:56:42 B 13 41 09.214 +11 34 04.55 Z R92
2026-03-08 23:00:22 C 13 41 09.022 +11 34 22.30 Z C23
2026-03-08 23:14:21 B 13 41 07.891 +11 35 29.58 Z R92
2026-03-08 23:47:58 C 13 41 05.496 +11 38 11.90 Z C23
2026-03-09 00:05:40 C 13 41 03.996 +11 40 12.40 V M22
2026-03-09 00:07:37 C 13 41 03.852 +11 40 21.83 V M22
2026-03-09 00:11:31 C 13 41 03.542 +11 40 40.66 V M22
2026-03-09 00:18:40 C 13 41 02.993 +11 41 14.96 V M22
2026-03-09 00:51:07 C 13 41 00.751 +11 43 15.92 Z C23
2026-03-09 00:53:08 B 13 41 00.504 +11 43 25.00 X L65
2026-03-09 01:01:24 B 13 40 59.887 +11 44 04.81 X L65
2026-03-09 01:09:41 B 13 40 59.263 +11 44 44.66 X L65
2026-03-09 11:26:19 C 13 40 14.581 +12 33 53.82 V 703
2026-03-09 11:29:38 C 13 40 14.315 +12 34 09.41 V 703
2026-03-09 11:32:56 C 13 40 14.063 +12 34 25.07 V 703
2026-03-09 11:36:14 C 13 40 13.804 +12 34 40.76 V 703
2026-03-09 14:03:31 C 13 40 03.410 +12 46 23.16 V T08
2026-03-09 14:56:44 C 13 39 59.239 +12 50 33.86 V T08
2026-03-09 15:38:34 C 13 39 55.982 +12 53 50.42 V T08
2026-03-09 15:54:03 C 13 39 54.797 +12 55 03.14 V T08
2026-03-09 21:02:27 B 13 39 34.663 +13 18 57.92 X L99
2026-03-09 21:04:56 B 13 39 34.466 +13 19 09.08 X L99
2026-03-09 21:07:27 B 13 39 34.258 +13 19 21.18 X L99
2026-03-09 21:09:57 B 13 39 34.099 +13 19 32.77 X L99
2026-03-09 21:12:27 B 13 39 33.924 +13 19 44.90 X L99
2026-03-10 21:25:56 C 13 37 47.99 +15 11 08.2 V M32
2026-03-10 21:28:20 C 13 37 47.81 +15 11 19.1 V M32
2026-03-10 21:30:42 C 13 37 47.62 +15 11 30.0 V M32
2026-03-10 21:33:07 C 13 37 47.44 +15 11 40.7 V M32
2026-03-10 21:35:29 C 13 37 47.25 +15 11 51.5 V M32
2026-03-11 23:41:40 C 13 35 50.345 +17 07 25.86 Z C23
2026-03-11 23:42:48 C 13 35 50.273 +17 07 30.90 Z C23
2026-03-11 23:43:58 C 13 35 50.208 +17 07 35.98 Z C23
2026-03-13 09:18:02 C 13 33 16.506 +19 29 20.76 V 703
2026-03-13 09:21:16 C 13 33 16.229 +19 29 33.83 V 703
2026-03-13 09:24:30 C 13 33 15.966 +19 29 47.08 V 703
2026-03-13 09:27:43 C 13 33 15.703 +19 30 00.29 V 703
2026-03-13 21:04:17 B 13 32 22.706 +20 16 56.39 X L99
2026-03-13 21:07:11 B 13 32 22.464 +20 17 09.56 X L99
2026-03-13 21:10:05 B 13 32 22.210 +20 17 20.72 X L99
2026-03-13 21:12:59 B 13 32 21.941 +20 17 31.52 X L99