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
2026-02-27 01:39:19 B 13 55 30.989 -09 22 44.40 X L65
2026-02-27 09:13:28 C 13 55 08.749 -08 41 01.39 V 703
2026-02-27 09:16:41 C 13 55 08.562 -08 40 43.82 V 703
2026-02-27 09:19:55 C 13 55 08.389 -08 40 26.00 V 703
2026-02-27 09:23:09 C 13 55 08.209 -08 40 07.50 V 703
2026-02-28 00:25:55 C 13 54 22.466 -07 16 49.26 V M22
2026-02-28 00:30:29 C 13 54 22.205 -07 16 24.10 V M22
2026-02-28 00:37:40 C 13 54 21.787 -07 15 44.64 V M22
2026-02-28 00:55:05 C 13 54 20.772 -07 14 08.84 V M22
2026-03-01 00:54:59 C 13 53 04.922 -05 02 36.78 Z C23
2026-03-01 01:11:33 C 13 53 03.946 -05 01 05.84 Z C23
2026-03-01 01:20:37 C 13 53 03.386 -05 00 15.80 Z C23
2026-03-01 08:45:43 C 13 52 39.432 -04 19 22.04 V 703
2026-03-01 08:48:56 C 13 52 39.256 -04 19 04.30 V 703
2026-03-01 08:52:09 C 13 52 39.047 -04 18 46.73 V 703
2026-03-01 08:55:22 C 13 52 38.834 -04 18 29.23 V 703
2026-03-02 05:51:57 C 13 51 28.822 -02 23 09.96 V W68
2026-03-02 05:56:35 C 13 51 28.531 -02 22 44.62 V W68
2026-03-02 06:17:44 C 13 51 27.192 -02 20 49.16 V W68
2026-03-02 06:36:17 C 13 51 26.014 -02 19 07.57 V W68
2026-03-02 09:10:30 C 13 51 17.233 -02 05 34.15 V 703
2026-03-02 09:13:50 C 13 51 17.014 -02 05 15.86 V 703
2026-03-02 09:17:10 C 13 51 16.805 -02 04 57.61 V 703
2026-03-02 09:20:30 C 13 51 16.589 -02 04 39.29 V 703
2026-03-02 22:59:12 C 13 50 29.760 -00 49 47.86 V M22
2026-03-02 23:04:23 C 13 50 29.431 -00 49 19.60 V M22
2026-03-02 23:11:35 C 13 50 28.968 -00 48 40.54 V M22
2026-03-02 23:27:57 C 13 50 27.926 -00 47 11.58 V M22
2026-03-03 01:57:03 B 13 50 18.456 -00 34 18.66 X L65
2026-03-03 02:01:11 B 13 50 18.194 -00 33 56.09 X L65
2026-03-03 02:05:19 B 13 50 17.926 -00 33 33.59 X L65
2026-03-04 02:01:03 B 13 48 51.864 +01 35 35.92 X L65
2026-03-04 02:05:11 B 13 48 51.595 +01 35 58.09 X L65
2026-03-04 02:09:19 B 13 48 51.322 +01 36 20.34 X L65
2026-03-04 08:15:36 C 13 48 29.619 +02 09 07.88 Z G82
2026-03-04 09:19:16 C 13 48 25.301 +02 14 47.97 Z G82
2026-03-04 11:08:28 C 13 48 17.818 +02 24 30.59 Z G82
2026-03-04 12:32:51 C 13 48 12.038 +02 32 00.68 Z G82
2026-03-06 10:45:10 C 13 45 15.356 +06 34 08.18 V U68
2026-03-06 10:49:58 C 13 45 15.009 +06 34 32.94 V U68
2026-03-06 11:10:09 C 13 45 13.558 +06 36 16.45 V U74
2026-03-06 11:11:56 C 13 45 13.435 +06 36 25.84 V U74
2026-03-06 20:54:37 B 13 44 35.798 +07 25 59.84 X L99
2026-03-06 20:56:55 B 13 44 35.714 +07 26 12.41 X L99
2026-03-06 20:59:13 B 13 44 35.508 +07 26 23.35 X L99
2026-03-07 01:11:03 B 13 44 17.971 +07 47 43.98 X L65
2026-03-07 01:15:12 B 13 44 17.669 +07 48 04.72 X L65
2026-03-07 01:19:20 B 13 44 17.381 +07 48 25.78 X L65
2026-03-07 20:37:32 C 13 42 59.530 +09 25 19.06 X L18
2026-03-07 20:38:36 C 13 42 59.465 +09 25 24.46 X L18