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
2026-04-01 20:43:51 C 12 57 07.846 +39 24 22.61 Z C23
2026-04-01 21:39:58 C 12 57 03.847 +39 25 36.80 Z C23
2026-04-03 20:15:27 B 12 53 57.539 +40 21 52.94 V 160
2026-04-03 20:19:16 B 12 53 57.279 +40 21 57.27 V 160
2026-04-03 20:23:04 B 12 53 57.024 +40 22 01.46 V 160
2026-04-03 21:20:36 C 12 53 53.090 +40 23 06.94 Z M26
2026-04-03 21:23:39 C 12 53 52.872 +40 23 10.50 Z M26
2026-04-03 21:26:42 C 12 53 52.651 +40 23 13.92 Z M26
2026-04-03 21:29:45 C 12 53 52.442 +40 23 17.23 Z M26
2026-04-03 21:33:38 C 12 53 52.159 +40 23 21.77 Z M26
2026-04-04 09:52:51 C 12 53 04.267 +40 36 57.64 V T08
2026-04-04 09:55:29 C 12 53 04.099 +40 37 00.52 V T08
2026-04-04 09:59:27 C 12 53 03.835 +40 37 04.62 V T08
2026-04-04 10:10:00 C 12 53 03.089 +40 37 16.07 V T08
2026-04-04 11:18:14 C 12 52 57.673 +40 38 22.56 V 703
2026-04-04 11:21:29 C 12 52 57.446 +40 38 25.33 V 703
2026-04-04 11:24:44 C 12 52 57.263 +40 38 28.64 V 703
2026-04-04 11:27:59 C 12 52 57.036 +40 38 32.03 V 703
2026-04-05 02:46:52 C 12 52 00.56 +40 54 29.8 V W46
2026-04-05 03:00:39 C 12 51 59.64 +40 54 44.2 V W46
2026-04-05 03:14:43 C 12 51 58.72 +40 54 58.4 V W46
2026-04-05 10:12:23 C 12 51 31.309 +41 01 56.75 V 703
2026-04-05 10:15:42 C 12 51 31.162 +41 01 59.30 V 703
2026-04-05 10:19:01 C 12 51 30.942 +41 02 02.18 V 703
2026-04-05 10:22:19 C 12 51 30.712 +41 02 05.82 V 703
2026-04-05 21:25:48 C 12 50 51.048 +41 12 46.69 Z C23
2026-04-05 22:54:26 C 12 50 45.250 +41 14 12.30 Z C23
2026-04-06 09:46:31 C 12 50 05.861 +41 24 26.17 V T05
2026-04-06 09:49:07 C 12 50 05.671 +41 24 28.58 V T05
2026-04-06 09:53:41 C 12 50 05.400 +41 24 32.90 V T05
2026-04-06 10:00:56 C 12 50 04.886 +41 24 39.38 V T05
2026-04-06 19:34:09 B 12 49 31.314 +41 33 05.13 V 160
2026-04-06 19:37:57 B 12 49 31.090 +41 33 08.66 V 160
2026-04-06 19:41:46 B 12 49 30.864 +41 33 12.02 V 160
2026-04-06 22:54:14 B 12 49 18.953 +41 36 02.20 X Y84
2026-04-06 22:56:56 B 12 49 18.785 +41 36 04.54 X Y84
2026-04-06 22:59:38 B 12 49 18.614 +41 36 06.91 X Y84
2026-04-07 19:25:46 B 12 48 07.754 +41 53 16.45 V 160
2026-04-07 19:28:07 B 12 48 07.622 +41 53 18.41 V 160
2026-04-07 19:30:28 B 12 48 07.505 +41 53 20.45 V 160
2026-04-07 21:08:35 B 12 48 01.536 +41 54 39.74 X K00
2026-04-07 22:00:26 B 12 47 58.397 +41 55 22.19 X K00
2026-04-07 22:52:16 B 12 47 55.255 +41 56 03.88 X K00
2026-04-08 07:59:51 C 12 47 23.896 +42 03 18.83 V 703
2026-04-08 08:03:14 C 12 47 23.701 +42 03 21.35 V 703
2026-04-08 08:06:35 C 12 47 23.482 +42 03 23.90 V 703
2026-04-08 08:09:55 C 12 47 23.291 +42 03 26.60 V 703