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
2025-11-19 18:49:03 C 20 07 37.560 -81 39 23.40 V M22
2025-11-21 00:21:58 C 19 58 10.116 -82 04 01.56 V W68
2025-11-21 00:26:06 C 19 58 08.849 -82 04 04.62 V W68
2025-11-21 00:35:37 C 19 58 05.316 -82 04 12.14 V W68
2025-11-21 00:49:48 C 19 58 00.353 -82 04 22.94 V W68
2025-11-22 00:22:59 C 19 49 43.457 -82 23 01.61 V W68
2025-11-22 00:27:07 C 19 49 42.000 -82 23 05.06 V W68
2025-11-22 00:57:28 C 19 49 30.415 -82 23 26.56 V W68
2025-11-22 01:04:55 C 19 49 27.590 -82 23 31.99 V W68
2025-11-27 00:27:15 C 18 55 20.645 -83 41 08.27 V W68
2025-11-27 00:31:25 C 18 55 18.528 -83 41 10.32 V W68
2025-11-27 00:45:48 C 18 55 10.541 -83 41 17.20 V W68
2025-11-27 01:03:08 C 18 55 01.188 -83 41 24.86 V W68
2025-11-28 00:28:13 C 18 41 48.454 -83 52 32.48 V W68
2025-11-28 00:32:23 C 18 41 45.974 -83 52 33.96 V W68
2025-11-28 00:39:55 C 18 41 41.501 -83 52 37.38 V W68
2025-11-28 00:59:39 C 18 41 30.168 -83 52 44.90 V W68
2025-12-01 00:30:58 C 17 56 23.983 -84 15 46.33 V W68
2025-12-01 00:35:48 C 17 56 20.844 -84 15 47.05 V W68
2025-12-01 00:43:19 C 17 56 15.706 -84 15 47.95 V W68
2025-12-01 01:09:49 C 17 55 58.190 -84 15 51.77 V W68
2025-12-12 08:05:22 C 15 12 39.936 -82 54 43.20 V W68
2025-12-12 08:13:08 C 15 12 36.742 -82 54 37.94 V W68
2025-12-12 08:20:06 C 15 12 33.797 -82 54 33.41 V W68
2025-12-15 07:59:49 C 14 46 55.666 -81 57 54.40 V W68
2025-12-15 08:08:30 C 14 46 52.966 -81 57 47.48 V W68
2025-12-15 08:22:38 C 14 46 48.454 -81 57 36.04 V W68
2025-12-15 08:30:54 C 14 46 46.234 -81 57 29.12 V W68
2025-12-16 07:57:26 C 14 40 00.242 -81 36 54.58 V W68
2025-12-16 08:06:39 C 14 39 57.648 -81 36 46.55 V W68
2025-12-16 08:13:10 C 14 39 55.836 -81 36 41.15 V W68
2025-12-16 08:31:32 C 14 39 50.928 -81 36 25.74 V W68
2025-12-18 07:44:47 C 14 28 17.887 -80 52 26.65 V W68
2025-12-18 07:48:51 C 14 28 17.110 -80 52 22.98 V W68
2025-12-18 07:52:11 C 14 28 16.334 -80 52 20.03 V W68
2025-12-18 08:01:51 C 14 28 14.134 -80 52 10.88 V W68
2025-12-18 08:25:20 C 14 28 08.909 -80 51 49.64 V W68
2025-12-18 08:26:53 C 14 28 08.467 -80 51 47.95 V W68
2025-12-19 06:34:38 C 14 23 35.114 -80 30 03.85 V W68
2025-12-19 07:05:59 C 14 23 29.057 -80 29 34.12 V W68
2025-12-19 07:28:09 C 14 23 24.790 -80 29 13.20 V W68
2025-12-19 07:34:28 C 14 23 23.465 -80 29 07.33 V W68
2025-12-20 01:22:38 C 14 20 04.831 -80 11 14.78 V M22
2025-12-20 01:26:46 C 14 20 04.171 -80 11 10.50 V M22
2025-12-20 01:34:16 C 14 20 02.791 -80 11 03.55 V M22
2025-12-20 01:52:05 C 14 19 59.700 -80 10 46.42 V M22
2025-12-21 07:59:21 C 14 15 02.813 -79 39 41.18 V W68
2025-12-21 08:12:18 C 14 15 00.737 -79 39 27.90 V W68
2025-12-21 08:26:23 C 14 14 58.488 -79 39 14.15 V W68
2025-12-23 00:17:06 C 14 09 31.930 -78 56 29.87 V M22