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
2025-08-07 03:55:40 C 23 36 24.950 +23 23 51.79 V R17
2025-08-07 04:11:06 C 23 36 25.032 +23 23 43.80 V R17
2025-08-07 21:15:48 C 23 36 33.96 +23 14 30.8 Z L04
2025-08-07 21:24:29 C 23 36 34.01 +23 14 26.0 Z L04
2025-08-08 06:20:49 C 23 36 37.764 +23 09 40.93 V W68
2025-08-08 06:24:09 C 23 36 37.752 +23 09 39.02 V W68
2025-08-08 06:44:39 C 23 36 37.838 +23 09 27.65 V W68
2025-08-08 06:49:14 C 23 36 37.889 +23 09 24.84 V W68
2025-08-09 00:51:25 C 23 36 45.227 +22 58 41.75 X R59
2025-08-09 00:59:18 C 23 36 45.264 +22 58 37.10 X R59
2025-08-09 01:07:11 C 23 36 45.299 +22 58 32.37 X R59
2025-08-09 11:03:42 C 23 36 48.930 +22 52 31.45 X F52
2025-08-09 11:12:48 C 23 36 48.941 +22 52 26.40 V T05
2025-08-09 11:15:25 C 23 36 48.972 +22 52 24.31 V T05
2025-08-09 11:17:43 C 23 36 48.967 +22 52 22.86 X F52
2025-08-09 11:19:58 C 23 36 48.994 +22 52 21.22 V T05
2025-08-09 11:31:41 C 23 36 49.003 +22 52 14.27 X F52
2025-08-09 11:32:14 C 23 36 48.926 +22 52 14.48 V T05
2025-08-09 11:41:21 C 23 36 49.015 +22 52 08.51 V T08
2025-08-09 11:43:59 C 23 36 49.022 +22 52 07.03 V T08
2025-08-09 11:45:56 C 23 36 49.034 +22 52 05.51 X F52
2025-08-09 11:48:08 C 23 36 49.058 +22 52 04.19 V T08
2025-08-09 12:22:15 C 23 36 49.106 +22 51 43.81 V T08
2025-08-09 14:02:57 C 23 36 49.331 +22 50 40.15 X F51
2025-08-09 14:16:17 C 23 36 49.361 +22 50 31.74 X F51
2025-08-09 14:29:31 C 23 36 49.391 +22 50 23.41 X F51
2025-08-10 09:55:01 C 23 36 55.820 +22 37 51.60 X F51
2025-08-10 10:23:58 C 23 36 55.878 +22 37 32.66 X F51
2025-08-10 10:38:07 C 23 36 55.895 +22 37 23.33 X F51
2025-08-10 10:52:14 C 23 36 55.917 +22 37 14.12 X F51
2025-08-10 14:04:28 C 23 36 56.063 +22 35 05.86 X F51
2025-08-10 14:19:00 C 23 36 56.074 +22 34 56.00 X F51
2025-08-10 14:33:24 C 23 36 56.086 +22 34 46.20 X F51
2025-08-10 14:47:42 C 23 36 56.099 +22 34 36.47 X F51
2025-08-14 21:44:50 B 23 37 01.24 +21 13 45.7 X L76
2025-08-14 22:00:14 B 23 37 01.16 +21 13 31.9 X L76
2025-08-14 22:15:39 B 23 37 01.08 +21 13 17.9 X L76
2025-08-15 01:25:39 C 23 37 00.725 +21 10 28.81 V R17
2025-08-15 01:44:22 C 23 37 00.600 +21 10 11.75 V R17
2025-08-15 02:01:08 C 23 37 00.497 +21 09 56.59 V R17
2025-08-15 02:21:31 C 23 37 00.370 +21 09 37.80 V R17
2025-08-15 22:06:40 B 23 36 56.16 +20 50 59.4 X L76
2025-08-15 22:15:55 B 23 36 56.08 +20 50 50.2 X L76
2025-08-15 22:25:10 B 23 36 56.02 +20 50 41.4 X L76
2025-08-15 22:34:24 B 23 36 55.95 +20 50 32.3 X L76
2025-08-15 22:43:40 B 23 36 55.91 +20 50 23.8 X L76
2025-08-16 13:55:02 C 23 36 51.038 +20 35 28.26 X F52
2025-08-16 14:10:56 C 23 36 50.904 +20 35 12.11 X F52
2025-08-16 14:26:45 C 23 36 50.751 +20 34 56.00 X F52
2025-08-16 22:39:47 B 23 36 48.51 +20 26 27.5 X L76