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
2025-10-14 06:10:20 B 22 08 32.208 -59 05 36.67 X X24
2025-10-14 20:23:08 C 22 07 07.118 -59 44 21.26 V M22
2025-10-14 20:27:57 C 22 07 06.497 -59 44 34.12 V M22
2025-10-14 20:35:51 C 22 07 05.662 -59 44 55.10 V M22
2025-10-14 20:50:34 C 22 07 04.001 -59 45 33.84 V M22
2025-10-16 02:19:49 C 22 04 04.445 -61 02 37.97 V W68
2025-10-16 02:23:52 C 22 04 04.001 -61 02 48.08 V W68
2025-10-16 02:31:55 C 22 04 03.096 -61 03 08.39 V W68
2025-10-16 02:53:46 C 22 04 00.653 -61 04 03.61 V W68
2025-10-17 02:33:08 C 22 01 36.739 -62 03 02.84 V W68
2025-10-17 02:37:04 C 22 01 36.302 -62 03 12.31 V W68
2025-10-17 02:45:04 C 22 01 35.424 -62 03 31.61 V W68
2025-10-17 03:00:27 C 22 01 33.696 -62 04 08.65 V W68
2025-10-19 02:08:56 C 21 56 47.693 -63 54 45.18 V W68
2025-10-19 02:12:56 C 21 56 47.254 -63 54 54.00 V W68
2025-10-19 02:20:12 C 21 56 46.428 -63 55 10.31 V W68
2025-10-19 02:36:55 C 21 56 44.570 -63 55 47.53 V W68
2025-10-20 19:57:03 C 21 52 34.471 -65 25 45.62 V M22
2025-10-20 20:00:58 C 21 52 34.037 -65 25 53.58 V M22
2025-10-20 20:08:11 C 21 52 33.223 -65 26 08.66 V M22
2025-10-20 20:26:39 C 21 52 31.166 -65 26 46.79 V M22
2025-10-23 01:55:03 C 21 47 08.278 -67 14 28.86 V W68
2025-10-23 02:05:07 C 21 47 07.145 -67 14 47.87 V W68
2025-10-23 02:09:54 C 21 47 06.626 -67 14 56.98 V W68
2025-10-23 02:27:55 C 21 47 04.620 -67 15 31.28 V W68
2025-10-26 19:03:29 C 21 38 08.246 -69 55 23.23 V M22
2025-10-26 19:08:43 C 21 38 07.625 -69 55 31.94 V M22
2025-10-26 19:15:58 C 21 38 06.806 -69 55 44.08 V M22
2025-10-26 19:35:02 C 21 38 04.608 -69 56 15.83 V M22
2025-10-28 01:24:48 C 21 35 01.848 -70 45 36.18 V W68
2025-10-28 01:28:49 C 21 35 01.363 -70 45 42.59 V W68
2025-10-28 01:37:49 C 21 35 00.350 -70 45 56.99 V W68
2025-10-28 01:53:08 C 21 34 58.608 -70 46 21.43 V W68
2025-10-29 01:06:10 C 21 32 35.237 -71 23 21.52 V W68
2025-10-29 01:32:28 C 21 32 32.414 -71 24 01.66 V W68
2025-10-29 02:02:59 C 21 32 28.879 -71 24 49.75 V W68
2025-10-29 02:11:53 C 21 32 27.811 -71 25 03.54 V W68
2025-10-29 02:25:30 C 21 32 26.263 -71 25 24.24 V W68
2025-10-29 19:39:34 C 21 30 38.964 -71 52 06.74 V M22
2025-10-29 19:43:35 C 21 30 38.489 -71 52 12.65 V M22
2025-10-29 19:51:32 C 21 30 37.608 -71 52 24.42 V M22
2025-10-29 20:05:25 C 21 30 35.981 -71 52 45.37 V M22
2025-10-31 01:29:45 C 21 27 30.060 -72 36 57.02 V W68
2025-10-31 01:33:46 C 21 27 29.539 -72 37 02.96 V W68
2025-10-31 01:42:30 C 21 27 28.541 -72 37 15.49 V W68
2025-10-31 01:56:12 C 21 27 26.899 -72 37 35.22 V W68
2025-11-01 19:05:26 C 21 22 59.628 -73 36 44.93 V M22
2025-11-01 19:10:54 C 21 22 58.946 -73 36 52.38 V M22
2025-11-01 19:18:23 C 21 22 58.058 -73 37 02.50 V M22
2025-11-01 19:39:40 C 21 22 55.438 -73 37 31.87 V M22