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
2024-04-04 10:45:05 C 15 38 53.725 +34 50 57.44 V 703
2024-04-04 10:48:30 C 15 38 53.657 +34 51 03.71 V 703
2024-04-04 10:51:54 C 15 38 53.524 +34 51 09.72 V 703
2024-04-04 13:44:50 C 15 38 44.983 +34 54 57.28 V T05
2024-04-04 14:04:40 C 15 38 43.949 +34 55 23.16 V T05
2024-04-04 15:04:00 C 15 38 40.886 +34 56 40.56 V T05
2024-04-05 14:24:46 C 15 37 30.646 +35 27 00.07 V T08
2024-04-05 14:54:03 C 15 37 29.054 +35 27 36.97 V T08
2024-04-05 15:17:51 C 15 37 27.773 +35 28 07.50 V T08
2024-04-07 10:33:23 C 15 35 11.050 +36 22 09.01 V T05
2024-04-07 10:43:18 C 15 35 10.486 +36 22 21.29 V T05
2024-04-07 10:53:13 C 15 35 09.910 +36 22 33.49 V T05
2024-04-11 09:42:14 C 15 29 38.749 +38 11 03.12 V 703
2024-04-11 09:48:54 C 15 29 38.281 +38 11 08.88 V 703
2024-04-11 09:52:11 C 15 29 38.108 +38 11 13.13 V 703
2024-04-13 09:45:19 C 15 26 37.583 +39 00 39.28 V 703
2024-04-13 09:48:35 C 15 26 37.280 +39 00 42.52 V 703
2024-04-13 09:51:51 C 15 26 37.158 +39 00 46.30 V 703
2024-04-13 09:55:06 C 15 26 36.910 +39 00 48.82 V 703
2024-04-15 07:31:01 C 15 23 38.227 +39 44 25.94 V G96
2024-04-15 07:38:23 C 15 23 37.712 +39 44 32.75 V G96
2024-04-15 07:45:45 C 15 23 37.208 +39 44 39.59 V G96
2024-04-15 07:53:07 C 15 23 36.697 +39 44 46.43 V G96
2024-04-15 09:57:05 C 15 23 28.043 +39 46 40.04 V 703
2024-04-15 10:01:14 C 15 23 27.776 +39 46 44.62 V 703
2024-04-15 10:05:07 C 15 23 27.528 +39 46 47.39 V 703
2024-04-15 10:08:40 C 15 23 27.301 +39 46 50.77 V 703
2024-04-16 09:40:46 C 15 21 52.315 +40 07 56.32 V 703
2024-04-16 09:44:05 C 15 21 52.099 +40 07 59.77 V 703
2024-04-16 09:50:44 C 15 21 51.394 +40 08 04.09 V 703
2024-04-17 08:48:32 C 15 20 17.794 +40 27 47.48 V 703
2024-04-17 08:52:53 C 15 20 17.531 +40 27 50.54 V 703
2024-04-17 08:57:01 C 15 20 17.228 +40 27 54.18 V 703
2024-04-17 09:00:44 C 15 20 16.919 +40 27 57.49 V 703
2024-04-17 10:57:24 C 15 20 09.084 +40 29 36.78 V T05
2024-04-17 11:32:32 C 15 20 06.610 +40 30 06.37 V T05
2024-04-17 11:35:09 C 15 20 06.430 +40 30 08.71 V T05
2024-04-17 11:48:40 C 15 20 05.438 +40 30 19.55 V T05
2024-04-19 02:33:01 S 15 17 31.786 +40 57 18.18 V C57
2024-04-19 02:33:01 s 1 +142350.97 2 +272967.73 3880.0 C57
2024-04-19 04:13:01 S 15 17 25.598 +40 58 33.60 V C57
2024-04-19 04:13:01 s 1 +138138.44 6 +273109.18 7740.0 C57
2024-04-19 07:53:01 S 15 17 10.152 +41 01 20.89 V C57
2024-04-19 07:53:01 s 1 +128632.70 8 +272934.16 2000.0 C57
2024-04-19 09:13:01 S 15 17 04.961 +41 02 17.38 V C57
2024-04-19 09:13:01 s 1 +125096.27 0 +272700.46 540.0 C57
2024-04-19 09:33:01 S 15 17 03.713 +41 02 34.66 V C57
2024-04-19 09:33:01 s 1 +124205.60 0 +272627.55 7680.0 C57
2024-04-19 09:53:01 S 15 17 02.302 +41 02 48.84 V C57
2024-04-19 09:53:01 s 1 +123312.32 3 +272548.80 3460.0 C57