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
2023-12-27 14:37:15 C 13 45 23.328 -22 38 26.70 V T08
2023-12-27 14:39:28 C 13 45 23.470 -22 38 24.40 V T08
2023-12-27 14:45:03 C 13 45 24.240 -22 38 20.76 V T08
2023-12-27 15:25:17 C 13 45 28.810 -22 37 44.94 V T08
2023-12-31 08:06:17 C 13 55 39.694 -21 19 51.89 V W68
2023-12-31 08:19:15 C 13 55 41.177 -21 19 40.76 V W68
2023-12-31 08:23:21 C 13 55 41.597 -21 19 36.70 V W68
2023-12-31 08:35:10 C 13 55 42.866 -21 19 26.18 V W68
2023-12-31 12:29:30 C 13 56 09.352 -21 16 04.66 V 703
2023-12-31 12:35:59 C 13 56 10.039 -21 15 58.72 V 703
2023-12-31 12:42:27 C 13 56 10.633 -21 15 52.31 V 703
2023-12-31 12:48:55 C 13 56 11.454 -21 15 46.48 V 703
2023-12-31 14:03:16 C 13 56 20.045 -21 14 37.32 V T08
2023-12-31 14:40:01 C 13 56 24.130 -21 14 05.03 V T08
2023-12-31 14:44:51 C 13 56 24.660 -21 14 00.35 V T08
2023-12-31 14:51:09 C 13 56 25.344 -21 13 54.70 V T08
2024-01-01 14:13:16 C 13 59 02.906 -20 52 40.19 V T08
2024-01-01 14:18:57 C 13 59 03.554 -20 52 36.44 V T08
2024-01-01 14:28:04 C 13 59 04.565 -20 52 26.51 V T08
2024-01-01 15:04:43 C 13 59 08.616 -20 51 53.89 V T08
2024-01-03 12:51:08 C 14 04 13.264 -20 09 29.48 V 703
2024-01-03 12:57:01 C 14 04 13.901 -20 09 24.08 V 703
2024-01-03 13:02:55 C 14 04 14.531 -20 09 18.72 V 703
2024-01-03 13:08:49 C 14 04 15.172 -20 09 13.14 V 703
2024-01-13 15:09:44 C 14 29 39.929 -16 05 09.74 V T08
2024-01-13 15:31:49 C 14 29 42.050 -16 04 45.91 V T08
2024-01-13 15:52:47 C 14 29 44.146 -16 04 23.16 V T08
2024-01-13 16:00:56 C 14 29 44.942 -16 04 14.09 V T08
2024-01-14 01:52:13 C 14 30 43.920 -15 53 24.94 V M22
2024-01-14 01:58:14 C 14 30 44.556 -15 53 18.82 V M22
2024-01-14 02:29:11 C 14 30 47.604 -15 52 45.26 V M22
2024-01-14 02:39:08 C 14 30 48.533 -15 52 33.89 V M22
2024-01-15 01:58:41 C 14 33 06.641 -15 27 00.65 V M22
2024-01-15 02:04:06 C 14 33 07.183 -15 26 54.49 V M22
2024-01-15 02:31:24 C 14 33 09.842 -15 26 24.86 V M22
2024-01-15 02:40:49 C 14 33 10.685 -15 26 14.75 V M22
2024-01-15 12:18:12 C 14 34 07.144 -15 15 43.70 V 703
2024-01-15 12:21:32 C 14 34 07.493 -15 15 40.36 V 703
2024-01-15 12:24:54 C 14 34 07.810 -15 15 36.86 V 703
2024-01-15 12:28:14 C 14 34 08.087 -15 15 32.65 V 703
2024-01-15 15:17:46 C 14 34 24.715 -15 12 23.22 V T05
2024-01-15 15:41:15 C 14 34 26.966 -15 11 56.98 V T05
2024-01-15 15:46:15 C 14 34 27.425 -15 11 51.32 V T05
2024-01-15 16:04:39 C 14 34 29.184 -15 11 31.42 V T05
2024-01-17 07:51:44 C 14 38 19.872 -14 26 36.67 V W68
2024-01-17 07:56:22 C 14 38 20.290 -14 26 31.56 V W68
2024-01-17 08:04:55 C 14 38 21.139 -14 26 21.70 V W68
2024-01-17 08:39:26 C 14 38 24.367 -14 25 42.42 V W68
2024-01-19 15:38:21 C 14 43 35.179 -13 22 12.32 V T05
2024-01-19 15:46:24 C 14 43 35.935 -13 22 02.93 V T05