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
2025-09-11 04:43:55 C 23 18 03.312 -02 45 39.56 V R17
2025-09-11 17:21:39 B 23 17 20.518 -03 36 13.97 W M73
2025-09-11 17:28:39 B 23 17 20.069 -03 36 42.30 W M73
2025-09-11 17:35:32 B 23 17 19.622 -03 37 10.16 W M73
2025-09-11 17:43:24 B 23 17 19.118 -03 37 42.06 W M73
2025-09-11 19:59:15 B 23 17 10.44 -03 47 00.2 X L76
2025-09-11 20:02:01 B 23 17 10.26 -03 47 11.3 X L76
2025-09-11 20:04:46 B 23 17 10.10 -03 47 22.6 X L76
2025-09-11 20:07:31 B 23 17 09.91 -03 47 33.8 X L76
2025-09-11 20:10:17 B 23 17 09.73 -03 47 45.0 X L76
2025-09-11 20:13:02 B 23 17 09.57 -03 47 56.4 X L76
2025-09-11 20:15:47 B 23 17 09.38 -03 48 07.5 X L76
2025-09-11 20:18:33 B 23 17 09.21 -03 48 18.7 X L76
2025-09-11 20:21:18 B 23 17 09.03 -03 48 29.9 X L76
2025-09-11 20:24:04 B 23 17 08.85 -03 48 41.1 X L76
2025-09-11 20:26:50 B 23 17 08.67 -03 48 52.2 X L76
2025-09-11 20:29:35 B 23 17 08.49 -03 49 03.5 X L76
2025-09-11 21:41:49 B 23 17 04.34 -03 53 56.4 V R99
2025-09-11 21:43:50 B 23 17 04.22 -03 54 04.9 V R99
2025-09-11 21:45:51 B 23 17 04.09 -03 54 13.1 V R99
2025-09-11 22:44:16 C 23 16 59.76 -03 58 11.0 X C40
2025-09-11 22:46:05 C 23 16 59.65 -03 58 18.4 X C40
2025-09-11 22:47:53 C 23 16 59.53 -03 58 25.8 X C40
2025-09-11 22:49:41 C 23 16 59.42 -03 58 33.1 X C40
2025-09-11 22:51:30 C 23 16 59.30 -03 58 40.4 X C40
2025-09-11 22:53:18 C 23 16 59.18 -03 58 47.9 X C40
2025-09-11 22:55:07 C 23 16 59.06 -03 58 55.2 X C40
2025-09-11 22:56:56 C 23 16 58.94 -03 59 02.7 X C40
2025-09-11 22:58:45 C 23 16 58.83 -03 59 10.0 X C40
2025-09-11 23:00:27 C 23 16 58.72 -03 59 17.1 X C40
2025-09-11 23:02:04 C 23 16 58.60 -03 59 23.6 X C40
2025-09-11 23:03:40 C 23 16 58.51 -03 59 30.1 X C40
2025-09-12 00:56:43 B 23 16 53.222 -04 06 54.22 Z X33
2025-09-12 00:59:16 B 23 16 53.074 -04 07 03.97 Z X33
2025-09-12 01:01:49 B 23 16 52.930 -04 07 16.07 Z X33
2025-09-12 19:06:56 C 23 15 46.202 -05 22 27.62 V M52
2025-09-12 19:47:20 C 23 15 43.594 -05 25 17.58 V M52
2025-09-12 19:49:52 C 23 15 43.14 -05 25 30.8 V M32
2025-09-12 19:51:57 C 23 15 43.00 -05 25 39.6 V M32
2025-09-12 19:54:02 C 23 15 42.86 -05 25 48.2 V M32
2025-09-12 19:54:50 B 23 15 42.53 -05 25 51.6 X L76
2025-09-12 19:56:07 C 23 15 42.72 -05 25 57.0 V M32
2025-09-12 19:57:42 B 23 15 42.34 -05 26 03.5 X L76
2025-09-12 19:58:12 C 23 15 42.58 -05 26 05.8 V M32
2025-09-12 20:00:34 B 23 15 42.15 -05 26 15.5 X L76
2025-09-12 20:03:26 B 23 15 41.96 -05 26 27.7 X L76
2025-09-12 20:06:18 B 23 15 41.77 -05 26 39.8 X L76
2025-09-12 20:09:10 B 23 15 41.57 -05 26 51.8 X L76
2025-09-12 20:12:02 B 23 15 41.38 -05 27 03.8 X L76
2025-09-12 20:14:55 B 23 15 41.19 -05 27 16.0 X L76