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
2026-03-20 21:12:04 C 13 18 59.580 +29 50 12.91 Z C23
2026-03-20 21:32:06 C 13 18 57.874 +29 51 09.43 Z C23
2026-03-20 21:59:55 C 13 18 55.536 +29 52 28.63 Z C23
2026-03-20 22:35:29 B 13 18 52.723 +29 54 10.15 X Y84
2026-03-20 22:38:12 B 13 18 52.498 +29 54 17.68 X Y84
2026-03-20 22:40:56 B 13 18 52.265 +29 54 25.52 X Y84
2026-03-20 23:49:01 B 13 18 46.406 +29 57 39.96 X K19
2026-03-20 23:54:13 B 13 18 45.955 +29 57 54.90 X K19
2026-03-20 23:59:25 B 13 18 45.504 +29 58 09.66 X K19
2026-03-21 08:34:31 C 13 18 03.841 +30 22 03.50 V 703
2026-03-21 08:37:52 C 13 18 03.553 +30 22 12.76 V 703
2026-03-21 08:41:07 C 13 18 03.262 +30 22 21.61 V 703
2026-03-21 08:44:24 C 13 18 02.992 +30 22 30.83 V 703
2026-03-21 09:40:03 C 13 17 58.164 +30 25 03.25 V 703
2026-03-21 09:43:22 C 13 17 57.872 +30 25 12.43 V 703
2026-03-21 09:46:38 C 13 17 57.592 +30 25 21.32 V 703
2026-03-21 09:49:53 C 13 17 57.318 +30 25 30.18 V 703
2026-03-21 22:03:57 C 13 16 59.419 +30 58 24.74 Z C23
2026-03-21 22:11:28 C 13 16 58.822 +30 58 45.23 Z C23
2026-03-21 22:37:17 B 13 16 56.772 +30 59 54.10 X Y84
2026-03-21 22:39:59 B 13 16 56.537 +31 00 01.33 X Y84
2026-03-21 22:42:42 B 13 16 56.323 +31 00 08.71 X Y84
2026-03-22 08:56:20 C 13 16 06.319 +31 27 05.72 V 703
2026-03-22 08:59:52 C 13 16 06.017 +31 27 14.83 V 703
2026-03-22 09:03:22 C 13 16 05.711 +31 27 24.08 V 703
2026-03-22 09:06:51 C 13 16 05.416 +31 27 33.01 V 703
2026-03-22 21:08:54 C 13 15 08.621 +31 58 07.14 Z C23
2026-03-22 22:22:09 C 13 15 02.573 +32 01 12.29 Z C23
2026-03-23 10:36:10 C 13 14 02.756 +32 31 31.73 V 703
2026-03-23 10:39:27 C 13 14 02.483 +32 31 39.65 V 703
2026-03-23 10:42:44 C 13 14 02.231 +32 31 47.21 V 703
2026-03-23 10:46:00 C 13 14 01.936 +32 31 55.27 V 703
2026-03-24 07:27:24 C 13 12 24.518 +33 20 57.01 Z G82
2026-03-24 08:38:55 C 13 12 18.480 +33 23 42.39 Z G82
2026-03-24 10:07:11 C 13 12 11.009 +33 27 04.10 V 703
2026-03-24 10:10:27 C 13 12 10.739 +33 27 11.70 V 703
2026-03-24 10:13:42 C 13 12 10.465 +33 27 18.94 V 703
2026-03-24 10:16:57 C 13 12 10.177 +33 27 26.42 V 703
2026-03-24 10:22:37 C 13 12 09.705 +33 27 39.41 Z G82
2026-03-24 11:15:41 C 13 12 05.275 +33 29 39.58 Z G82
2026-03-25 00:32:09 C 13 11 02.91 +33 59 25.8 X C40
2026-03-25 00:33:52 C 13 11 02.77 +33 59 29.3 X C40
2026-03-25 00:35:42 C 13 11 02.60 +33 59 33.8 X C40
2026-03-25 00:37:52 C 13 11 02.43 +33 59 38.6 X C40
2026-03-25 00:39:55 C 13 11 02.27 +33 59 42.9 X C40
2026-03-25 00:41:37 C 13 11 02.12 +33 59 46.6 X C40
2026-03-25 00:43:21 C 13 11 01.97 +33 59 49.9 X C40
2026-03-25 00:45:05 C 13 11 01.83 +33 59 53.9 X C40
2026-03-25 00:46:48 C 13 11 01.68 +33 59 57.8 X C40
2026-03-25 00:48:32 C 13 11 01.55 +34 00 01.7 X C40