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
2025-08-29 22:33:22 C 23 31 11.174 +12 17 03.16 V M22
2025-08-29 22:39:59 C 23 31 10.939 +12 16 48.43 V M22
2025-08-29 22:48:26 C 23 31 10.632 +12 16 29.60 V M22
2025-08-30 03:36:25 C 23 31 01.030 +12 05 26.95 V R17
2025-08-30 04:00:52 C 23 31 00.163 +12 04 31.62 V R17
2025-08-30 04:18:39 C 23 30 59.534 +12 03 51.44 V R17
2025-08-30 04:33:50 C 23 30 58.999 +12 03 16.96 V R17
2025-08-30 22:55:26 B 23 30 24.643 +11 20 55.25 W J37
2025-08-30 23:03:07 B 23 30 24.305 +11 20 37.07 W J37
2025-08-30 23:10:58 B 23 30 24.043 +11 20 18.13 W J37
2025-08-30 23:31:13 B 23 30 23.261 +11 19 31.37 W J37
2025-08-31 07:45:34 C 23 30 06.325 +10 59 57.01 V 703
2025-08-31 08:04:48 C 23 30 05.612 +10 59 11.08 V 703
2025-08-31 08:07:45 C 23 30 05.501 +10 59 03.80 V 703
2025-08-31 08:10:41 C 23 30 05.382 +10 58 56.71 V 703
2025-08-31 22:02:30 B 23 29 37.018 +10 25 04.51 V 160
2025-08-31 22:08:23 B 23 29 36.797 +10 24 50.00 V 160
2025-08-31 22:19:16 C 23 29 36.274 +10 24 45.79 V M22
2025-08-31 22:23:11 C 23 29 36.122 +10 24 36.11 V M22
2025-08-31 22:32:23 C 23 29 35.748 +10 24 13.25 V M22
2025-08-31 23:08:17 C 23 29 34.322 +10 22 44.29 V M22
2025-09-02 03:56:45 B 23 28 31.166 +09 08 33.72 W X04
2025-09-02 04:03:59 B 23 28 30.886 +09 08 13.81 W X04
2025-09-02 04:10:23 B 23 28 30.605 +09 07 57.47 W X04
2025-09-02 09:36:24 C 23 28 18.365 +08 53 38.71 X F51
2025-09-02 09:50:26 C 23 28 17.748 +08 53 01.72 V T08
2025-09-02 09:55:19 C 23 28 17.543 +08 52 48.22 X F51
2025-09-02 10:06:16 C 23 28 17.052 +08 52 19.38 V T08
2025-09-02 10:10:14 C 23 28 16.884 +08 52 08.83 V T08
2025-09-02 10:14:17 C 23 28 16.717 +08 51 57.56 X F51
2025-09-02 10:16:53 C 23 28 16.591 +08 51 51.12 V T08
2025-09-02 10:33:21 C 23 28 15.882 +08 51 05.94 X F51
2025-09-02 21:13:42 C 23 27 51.31 +08 22 04.1 V G17
2025-09-02 21:16:33 C 23 27 51.18 +08 21 55.9 V G17
2025-09-02 21:19:25 C 23 27 51.05 +08 21 48.6 V G17
2025-09-02 23:00:23 B 23 27 47.213 +08 17 15.68 X J51
2025-09-02 23:16:23 B 23 27 46.507 +08 16 31.73 X J51
2025-09-02 23:28:41 B 23 27 45.960 +08 15 57.85 X J51
2025-09-03 05:14:54 B 23 27 31.62 +07 59 55.2 Z W37
2025-09-03 05:32:23 B 23 27 30.85 +07 59 06.5 Z W37
2025-09-03 05:37:54 C 23 27 30.463 +07 59 13.74 V W68
2025-09-03 05:42:32 C 23 27 30.254 +07 59 00.96 V W68
2025-09-03 05:48:51 B 23 27 30.13 +07 58 20.6 Z W37
2025-09-03 06:12:16 C 23 27 28.927 +07 57 37.87 V W68
2025-09-03 06:19:28 C 23 27 28.613 +07 57 18.32 V W68
2025-09-03 19:22:39 B 23 26 57.31 +07 19 56.2 X L76
2025-09-03 19:27:55 B 23 26 57.08 +07 19 41.0 X L76
2025-09-03 19:33:11 B 23 26 56.86 +07 19 25.9 X L76
2025-09-03 19:38:28 B 23 26 56.61 +07 19 10.8 X L76
2025-09-03 19:43:45 B 23 26 56.38 +07 18 55.9 X L76