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
2025-07-24 11:39:28 C 23 30 55.894 +24 59 47.65 V T05
2025-07-24 11:50:24 C 23 30 56.126 +24 59 46.50 V T05
2025-07-24 12:01:11 C 23 30 56.393 +24 59 45.85 V T05
2025-07-24 12:10:18 C 23 30 56.558 +24 59 44.77 V T05
2025-07-27 10:42:51 C 23 32 32.071 +24 49 47.89 V T05
2025-07-27 10:51:01 C 23 32 32.242 +24 49 46.27 V T05
2025-07-27 11:06:33 C 23 32 32.518 +24 49 43.72 V T05
2025-07-27 11:20:06 C 23 32 32.786 +24 49 41.63 V T05
2025-07-28 14:18:34 C 23 33 05.414 +24 44 33.00 V T05
2025-07-28 14:20:04 C 23 33 05.436 +24 44 32.64 V T05
2025-07-28 14:44:03 C 23 33 05.846 +24 44 27.46 V T05
2025-07-28 14:53:34 C 23 33 06.007 +24 44 25.55 V T05
2025-07-28 15:00:30 C 23 33 06.161 +24 44 24.04 V T05
2025-08-01 10:56:08 C 23 34 44.791 +24 20 32.21 V T08
2025-08-01 10:58:46 C 23 34 44.815 +24 20 31.38 V T08
2025-08-01 11:03:23 C 23 34 44.887 +24 20 29.87 V T08
2025-08-01 11:52:11 C 23 34 45.509 +24 20 14.86 V T08
2025-08-02 12:01:49 C 23 35 07.279 +24 12 11.48 V T05
2025-08-02 12:05:05 C 23 35 07.310 +24 12 10.44 V T05
2025-08-02 12:09:40 C 23 35 07.370 +24 12 08.78 V T05
2025-08-02 12:16:57 C 23 35 07.462 +24 12 06.88 V T05
2025-08-03 11:35:49 C 23 35 26.938 +24 03 34.34 V T05
2025-08-03 11:40:11 C 23 35 26.969 +24 03 32.36 V T05
2025-08-03 11:45:25 C 23 35 27.055 +24 03 30.82 V T05
2025-08-03 12:22:23 C 23 35 27.382 +24 03 16.34 V T05
2025-08-05 11:32:34 C 23 36 01.639 +23 43 32.63 V T08
2025-08-05 11:33:13 C 23 36 01.634 +23 43 32.30 V T08
2025-08-05 11:36:37 C 23 36 01.661 +23 43 30.65 V T08
2025-08-05 11:37:17 C 23 36 01.668 +23 43 30.65 V T08
2025-08-05 11:40:36 C 23 36 01.711 +23 43 28.81 V T08
2025-08-05 11:43:23 C 23 36 01.728 +23 43 27.88 V T08
2025-08-05 12:08:59 C 23 36 01.927 +23 43 16.25 V T08
2025-08-06 10:45:33 C 23 36 15.996 +23 32 33.45 X F52
2025-08-06 11:01:14 C 23 36 16.105 +23 32 25.88 X F52
2025-08-06 11:16:57 C 23 36 16.211 +23 32 18.30 X F52
2025-08-06 11:19:55 C 23 36 16.212 +23 32 16.80 V T05
2025-08-06 11:23:56 C 23 36 16.270 +23 32 14.60 V T05
2025-08-06 11:28:42 C 23 36 16.291 +23 32 12.59 V T05
2025-08-06 11:32:44 C 23 36 16.315 +23 32 10.63 X F52
2025-08-06 11:36:32 C 23 36 16.339 +23 32 08.74 V T05
2025-08-06 22:12:55 B 23 36 22.382 +23 26 43.60 W G34
2025-08-06 22:18:38 B 23 36 22.454 +23 26 40.20 W G34
2025-08-06 22:20:05 B 23 36 22.24 +23 26 41.8 X L76
2025-08-06 22:30:27 B 23 36 22.31 +23 26 36.3 X L76
2025-08-06 22:40:49 B 23 36 22.40 +23 26 30.7 X L76
2025-08-07 01:13:33 C 23 36 23.826 +23 25 13.72 X R59
2025-08-07 01:24:49 C 23 36 23.885 +23 25 08.00 X R59
2025-08-07 01:36:05 C 23 36 23.961 +23 25 02.20 X R59
2025-08-07 03:14:10 C 23 36 24.708 +23 24 13.39 V R17
2025-08-07 03:36:50 C 23 36 24.845 +23 24 01.94 V R17