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
2025-10-05 03:14:04 C 22 30 40.226 -46 58 32.77 V W68
2025-10-05 03:22:49 C 22 30 39.307 -46 59 06.86 V W68
2025-10-05 03:39:20 C 22 30 37.538 -47 00 11.81 V W68
2025-10-07 03:15:52 C 22 25 52.774 -50 00 44.46 V W68
2025-10-07 03:19:49 C 22 25 52.356 -50 00 59.15 V W68
2025-10-07 03:27:53 C 22 25 51.458 -50 01 28.27 V W68
2025-10-07 03:42:27 C 22 25 49.846 -50 02 20.87 V W68
2025-10-07 22:34:19 B 22 23 58.181 -51 10 21.07 X X89
2025-10-07 22:35:59 B 22 23 57.991 -51 10 27.48 X X89
2025-10-07 22:37:37 B 22 23 57.809 -51 10 33.02 X X89
2025-10-08 03:17:43 C 22 23 27.802 -51 26 58.38 V W68
2025-10-08 03:22:25 C 22 23 27.283 -51 27 14.98 V W68
2025-10-08 03:30:32 C 22 23 26.400 -51 27 43.31 V W68
2025-10-08 03:44:33 C 22 23 24.862 -51 28 32.16 V W68
2025-10-08 20:46:41 C 22 21 42.218 -52 27 39.78 V M22
2025-10-08 20:50:37 C 22 21 41.758 -52 27 53.21 V M22
2025-10-08 20:58:37 C 22 21 40.901 -52 28 20.35 V M22
2025-10-08 21:13:05 C 22 21 39.312 -52 29 09.56 V M22
2025-10-09 00:22:59 C 22 21 21.75 -52 39 58.1 W W84
2025-10-09 01:16:17 C 22 21 15.88 -52 43 00.4 W W84
2025-10-09 01:19:52 C 22 21 15.48 -52 43 12.4 W W84
2025-10-09 01:27:00 C 22 21 14.69 -52 43 36.7 W W84
2025-10-10 02:49:10 C 22 18 39.811 -54 07 59.81 V W68
2025-10-10 02:53:10 C 22 18 39.370 -54 08 12.66 V W68
2025-10-10 03:01:08 C 22 18 38.477 -54 08 38.44 V W68
2025-10-10 03:21:53 C 22 18 36.194 -54 09 45.58 V W68
2025-10-11 02:47:15 C 22 16 13.848 -55 24 30.64 V W68
2025-10-11 02:51:13 C 22 16 13.433 -55 24 42.84 V W68
2025-10-11 03:00:00 C 22 16 12.432 -55 25 10.38 V W68
2025-10-11 03:18:20 C 22 16 10.394 -55 26 06.94 V W68
2025-10-11 03:37:58 B 22 16 08.218 -55 27 09.07 X X24
2025-10-11 03:53:39 B 22 16 06.482 -55 27 57.13 X X24
2025-10-11 04:08:10 B 22 16 04.862 -55 28 41.81 X X24
2025-10-13 02:21:51 C 22 11 23.758 -57 47 28.61 V W68
2025-10-13 02:25:48 C 22 11 23.302 -57 47 39.95 V W68
2025-10-13 02:34:12 C 22 11 22.370 -57 48 04.07 V W68
2025-10-13 02:47:36 C 22 11 20.885 -57 48 42.34 V W68
2025-10-13 23:50:57 C 22 09 13.680 -58 48 17.89 X X29
2025-10-13 23:56:39 C 22 09 13.056 -58 48 32.33 X X29
2025-10-14 00:02:20 C 22 09 12.394 -58 48 48.38 X X29
2025-10-14 02:15:52 C 22 08 57.806 -58 54 59.76 V W68
2025-10-14 02:20:30 C 22 08 57.310 -58 55 12.68 V W68
2025-10-14 02:30:19 C 22 08 56.215 -58 55 39.65 V W68
2025-10-14 02:41:37 C 22 08 54.974 -58 56 10.72 V W68
2025-10-14 02:47:01 C 22 08 54.374 -58 56 25.48 V W68
2025-10-14 02:49:40 C 22 08 54.072 -58 56 32.60 V W68
2025-10-14 02:54:23 C 22 08 53.532 -58 56 45.60 V W68
2025-10-14 03:08:26 C 22 08 51.970 -58 57 24.16 V W68
2025-10-14 05:26:19 B 22 08 36.862 -59 03 38.09 X X24
2025-10-14 05:48:19 B 22 08 34.524 -59 04 37.27 X X24