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
2018-06-12 08:33:54 C 17 33 10.87 +39 40 35.8 U 703
2018-06-12 08:41:31 C 17 33 10.35 +39 40 35.9 U 703
2018-06-12 08:49:09 C 17 33 09.85 +39 40 35.7 U 703
2018-06-12 08:56:46 C 17 33 09.43 +39 40 35.9 U 703
2018-06-19 06:54:12 C 17 22 54.39 +39 28 41.2 U I41
2018-06-19 07:23:32 C 17 22 52.54 +39 28 37.0 U I41
2018-06-19 07:41:01 C 17 22 51.45 +39 28 34.6 U I41
2018-06-22 06:53:49 C 17 18 35.30 +39 15 45.8 U I41
2018-06-22 07:17:04 C 17 18 33.89 +39 15 40.8 U I41
2018-06-25 07:16:54 C 17 14 23.04 +38 58 13.5 U I41
2018-06-25 07:40:11 C 17 14 21.70 +38 58 07.1 U I41
2018-07-04 06:51:41 C 17 03 00.32 +37 41 00.3 U G96
2018-07-04 06:59:23 C 17 02 59.96 +37 40 56.9 U G96
2018-07-04 07:07:06 C 17 02 59.56 +37 40 53.6 U G96
2018-07-04 07:14:49 C 17 02 59.18 +37 40 50.2 U G96
2018-07-13 14:04:50 C 16 53 35.16 +35 46 54.1 q D29
2018-07-13 14:25:12 C 16 53 34.42 +35 46 42.3 q D29
2018-07-13 14:45:34 C 16 53 33.63 +35 46 30.0 q D29
2020-02-05 04:39:28 C 16 38 35.44 +07 28 20.2 V C95
2020-02-05 05:29:54 C 16 38 38.99 +07 28 51.5 V C95
2020-04-14 11:23:29 C 17 39 53.42 +30 45 50.3 V 703
2020-04-14 11:29:18 C 17 39 53.11 +30 45 57.4 V 703
2020-04-14 11:35:07 C 17 39 52.96 +30 46 02.4 V 703
2020-04-14 11:40:53 C 17 39 52.80 +30 46 07.7 V 703
2020-04-20 09:58:25 C 17 37 51.32 +32 49 20.6 V G96
2020-04-20 10:05:19 C 17 37 51.18 +32 49 26.3 V G96
2020-04-20 10:12:18 C 17 37 51.03 +32 49 32.1 V G96
2020-04-20 10:19:11 C 17 37 50.89 +32 49 38.2 V G96
2020-05-02 10:15:58 C 17 29 24.59 +36 31 22.0 V 703
2020-05-02 10:24:17 C 17 29 24.17 +36 31 27.3 V 703
2020-05-02 10:40:45 C 17 29 23.58 +36 31 39.0 V 703
2020-05-04 09:17:35 C 17 27 30.48 +37 02 54.9 V G96
2020-05-04 09:24:20 C 17 27 30.18 +37 02 59.0 V G96
2020-05-04 09:31:06 C 17 27 29.88 +37 03 03.6 V G96
2020-05-04 09:37:52 C 17 27 29.60 +37 03 07.9 V G96
2020-05-05 10:13:25 C 17 26 26.47 +37 19 00.6 V 703
2020-05-05 10:21:46 C 17 26 26.01 +37 19 05.3 V 703
2020-05-05 10:29:46 C 17 26 25.73 +37 19 11.7 V 703
2020-05-05 10:37:38 C 17 26 25.31 +37 19 16.2 V 703
2020-05-05 12:05:35 C 17 26 21.696 +37 20 12.77 U F52
2020-05-05 12:22:31 C 17 26 20.945 +37 20 23.54 U F52
2020-05-05 12:39:31 C 17 26 20.165 +37 20 34.25 U F52
2020-05-05 12:56:37 C 17 26 19.385 +37 20 45.04 U F52
2020-05-09 14:00:33 C 17 21 48.468 +38 18 48.30 U F52
2020-05-09 14:13:18 C 17 21 47.839 +38 18 55.24 U F52
2020-05-09 14:25:51 C 17 21 47.207 +38 19 02.41 U F52
2020-05-09 14:38:22 C 17 21 46.577 +38 19 09.06 U F52
2020-05-13 09:33:01 C 17 17 05.18 +39 06 39.0 V 703
2020-05-13 09:40:37 C 17 17 04.64 +39 06 43.2 V 703
2020-05-13 09:48:14 C 17 17 04.23 +39 06 46.9 V 703