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
2025-09-22 21:39:41 C 22 57 54.528 -24 26 50.78 V M22
2025-09-22 21:43:38 C 22 57 54.166 -24 27 10.44 V M22
2025-09-22 21:50:48 C 22 57 53.510 -24 27 46.30 V M22
2025-09-22 22:05:28 C 22 57 52.178 -24 28 59.45 V M22
2025-09-23 04:20:53 B 22 57 20.482 -25 00 17.06 q X22
2025-09-23 04:25:14 B 22 57 20.088 -25 00 38.70 q X22
2025-09-23 04:29:34 B 22 57 19.682 -25 01 00.41 q X22
2025-09-24 03:21:17 B 22 55 23.093 -26 55 09.37 q X22
2025-09-24 03:25:49 B 22 55 22.687 -26 55 31.84 q X22
2025-09-24 03:30:29 B 22 55 22.246 -26 55 55.13 q X22
2025-09-24 03:54:16 C 22 55 20.038 -26 57 53.89 V W68
2025-09-24 03:58:10 C 22 55 19.670 -26 58 13.40 V W68
2025-09-24 04:35:07 C 22 55 16.219 -27 01 17.15 V W68
2025-09-24 04:45:41 C 22 55 15.235 -27 02 09.53 V W68
2025-09-25 08:14:41 C 22 52 52.368 -29 18 56.38 V T08
2025-09-25 08:16:40 C 22 52 52.178 -29 19 06.13 V T08
2025-09-25 08:21:16 C 22 52 51.732 -29 19 28.96 V T08
2025-09-25 08:47:09 C 22 52 49.238 -29 21 37.08 V T08
2025-09-25 21:45:51 C 22 51 39.890 -30 25 13.94 V M22
2025-09-25 21:50:25 C 22 51 39.451 -30 25 36.23 V M22
2025-09-25 22:28:17 C 22 51 35.810 -30 28 41.92 V M22
2025-09-25 22:36:17 C 22 51 35.042 -30 29 21.08 V M22
2025-09-28 09:27:20 C 22 46 14.369 -35 13 57.40 V T05
2025-09-28 09:31:54 C 22 46 13.901 -35 14 18.92 V T05
2025-09-28 09:53:40 C 22 46 11.712 -35 16 01.56 V T05
2025-09-28 10:34:47 C 22 46 07.567 -35 19 15.02 V T05
2025-09-29 21:25:18 C 22 42 52.601 -38 01 17.33 V M22
2025-09-29 21:29:24 C 22 42 52.181 -38 01 35.80 V M22
2025-09-29 21:38:04 C 22 42 51.300 -38 02 15.43 V M22
2025-09-29 22:29:22 C 22 42 46.068 -38 06 09.54 V M22
2025-10-01 03:23:29 C 22 40 01.550 -40 16 39.00 V W68
2025-10-01 03:27:36 C 22 40 01.118 -40 16 57.18 V W68
2025-10-01 03:35:33 C 22 40 00.293 -40 17 32.53 V W68
2025-10-01 03:50:10 C 22 39 58.774 -40 18 37.12 V W68
2025-10-01 07:38:00 C 22 39 37.862 -40 35 44.77 V T08
2025-10-01 07:40:38 C 22 39 37.589 -40 35 56.83 V T08
2025-10-01 07:44:35 C 22 39 37.171 -40 36 14.15 V T08
2025-10-02 03:16:01 C 22 37 43.625 -42 01 20.60 V W68
2025-10-02 03:20:40 C 22 37 43.126 -42 01 40.69 V W68
2025-10-02 03:28:38 C 22 37 42.300 -42 02 14.89 V W68
2025-10-02 03:43:15 C 22 37 40.766 -42 03 17.89 V W68
2025-10-02 21:20:33 C 22 35 58.181 -43 18 37.66 V M22
2025-10-02 21:24:29 C 22 35 57.749 -43 18 54.32 V M22
2025-10-02 21:32:34 C 22 35 56.921 -43 19 28.27 V M22
2025-10-02 22:23:48 C 22 35 51.523 -43 23 03.48 V M22
2025-10-04 03:02:28 C 22 33 03.790 -45 21 49.46 V W68
2025-10-04 03:08:02 C 22 33 03.190 -45 22 11.96 V W68
2025-10-04 03:15:13 C 22 33 02.434 -45 22 41.12 V W68
2025-10-04 03:36:51 C 22 33 00.134 -45 24 08.53 V W68
2025-10-05 03:10:08 C 22 30 40.661 -46 58 17.51 V W68