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
2024-01-19 15:50:34 C 14 43 36.317 -13 21 58.14 V T05
2024-01-19 15:59:45 C 14 43 37.159 -13 21 47.12 V T05
2024-01-23 14:12:15 C 14 52 09.648 -11 27 59.11 V T05
2024-01-23 14:16:49 C 14 52 10.022 -11 27 52.63 V T05
2024-01-23 14:26:53 C 14 52 10.891 -11 27 40.57 V T05
2024-01-23 14:46:36 C 14 52 12.586 -11 27 15.62 V T05
2024-01-24 02:16:05 C 14 53 13.306 -11 12 49.54 V M22
2024-01-24 02:40:28 C 14 53 15.365 -11 12 19.66 V M22
2024-01-24 02:44:57 C 14 53 15.821 -11 12 13.32 V M22
2024-01-24 02:49:34 C 14 53 16.159 -11 12 07.99 V M22
2024-01-30 08:02:16 C 15 05 46.320 -07 57 48.60 V W68
2024-01-30 08:07:30 C 15 05 46.721 -07 57 41.47 V W68
2024-01-30 08:13:24 C 15 05 47.182 -07 57 33.30 V W68
2024-01-30 08:23:12 C 15 05 47.988 -07 57 19.76 V W68
2024-01-31 14:08:47 C 15 08 08.983 -07 16 46.70 V T05
2024-01-31 14:15:36 C 15 08 09.521 -07 16 37.52 V T05
2024-01-31 14:29:47 C 15 08 10.565 -07 16 17.87 V T05
2024-01-31 14:39:10 C 15 08 11.280 -07 16 05.20 V T05
2024-02-02 14:04:44 C 15 11 49.752 -06 09 53.06 V T08
2024-02-02 14:09:24 C 15 11 50.098 -06 09 47.20 V T08
2024-02-02 14:27:37 C 15 11 51.439 -06 09 21.64 V T08
2024-02-02 14:35:46 C 15 11 52.051 -06 09 10.04 V T08
2024-02-03 08:36:38 C 15 13 12.994 -05 43 27.48 V W68
2024-02-03 08:41:55 C 15 13 13.346 -05 43 20.17 V W68
2024-02-03 08:51:18 C 15 13 13.992 -05 43 06.20 V W68
2024-02-03 09:01:52 C 15 13 14.801 -05 42 50.40 V W68
2024-02-04 14:49:44 C 15 15 26.066 -05 00 08.78 V T05
2024-02-04 14:53:56 C 15 15 26.311 -05 00 02.38 V T05
2024-02-04 15:01:07 C 15 15 26.844 -04 59 52.48 V T05
2024-02-04 15:15:35 C 15 15 27.842 -04 59 31.27 V T05
2024-02-06 15:32:21 C 15 18 53.659 -03 48 41.54 V T08
2024-02-06 15:37:12 C 15 18 53.918 -03 48 34.88 V T08
2024-02-06 15:45:00 C 15 18 54.468 -03 48 23.87 V T08
2024-02-06 15:57:10 C 15 18 55.238 -03 48 06.66 V T08
2024-02-09 02:35:14 C 15 22 53.652 -02 19 39.29 V M22
2024-02-09 02:37:50 C 15 22 53.801 -02 19 35.29 V M22
2024-02-09 03:00:53 C 15 22 55.294 -02 18 59.76 V M22
2024-02-09 03:09:26 C 15 22 55.874 -02 18 46.98 V M22
2024-02-09 04:45:05 S 15 23 01.64 -02 16 23.7 L C51
2024-02-09 12:29:45 S 15 23 31.99 -02 04 32.7 L C51
2024-02-09 14:02:31 S 15 23 38.02 -02 02 10.1 L C51
2024-02-09 15:35:19 S 15 23 44.11 -01 59 46.4 L C51
2024-02-10 00:52:00 S 15 24 20.16 -01 45 31.0 L C51
2024-02-10 14:43:00 C 15 25 13.843 -01 24 09.04 V T08
2024-02-10 14:47:10 C 15 25 14.102 -01 24 02.84 V T08
2024-02-10 14:59:46 C 15 25 14.851 -01 23 43.08 V T08
2024-02-10 15:17:35 C 15 25 15.955 -01 23 15.50 V T08
2024-02-11 07:48:03 C 15 26 18.487 -00 57 23.72 V W68
2024-02-11 07:53:02 C 15 26 18.768 -00 57 15.77 V W68
2024-02-11 08:25:13 C 15 26 20.722 -00 56 25.30 V W68