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
2025-11-03 00:45:17 C 21 19 40.258 -74 17 37.90 X X29
2025-11-03 00:56:41 C 21 19 38.400 -74 17 53.84 X X29
2025-11-03 01:08:05 C 21 19 37.030 -74 18 07.42 X X29
2025-11-03 01:15:46 C 21 19 36.499 -74 18 19.15 V W68
2025-11-03 01:24:27 C 21 19 35.390 -74 18 30.42 V W68
2025-11-03 01:29:04 C 21 19 34.841 -74 18 36.47 V W68
2025-11-03 01:44:18 C 21 19 32.930 -74 18 56.56 V W68
2025-11-04 01:34:24 C 21 16 47.556 -74 50 46.50 V W68
2025-11-04 01:39:10 C 21 16 46.850 -74 50 52.37 V W68
2025-11-04 02:09:27 C 21 16 42.950 -74 51 30.92 V W68
2025-11-04 02:19:06 C 21 16 41.707 -74 51 43.20 V W68
2025-11-06 01:49:33 C 21 10 55.075 -75 52 40.44 V W68
2025-11-06 01:55:09 C 21 10 54.257 -75 52 47.24 V W68
2025-11-06 02:02:28 C 21 10 53.352 -75 52 56.03 V W68
2025-11-06 02:17:48 C 21 10 51.228 -75 53 14.86 V W68
2025-11-09 00:54:01 C 21 01 21.221 -77 18 20.45 V W68
2025-11-09 01:18:07 C 21 01 17.489 -77 18 47.48 V W68
2025-11-09 01:22:16 C 21 01 16.781 -77 18 52.09 V W68
2025-11-09 01:29:35 C 21 01 15.677 -77 19 00.34 V W68
2025-11-10 01:04:01 C 20 57 46.018 -77 46 02.89 V W68
2025-11-10 01:08:04 C 20 57 45.406 -77 46 07.21 V W68
2025-11-10 01:31:02 C 20 57 41.621 -77 46 32.38 V W68
2025-11-10 01:38:03 C 20 57 40.510 -77 46 40.04 V W68
2025-11-12 00:12:53 C 20 50 10.735 -78 38 11.65 V W68
2025-11-12 00:16:58 C 20 50 09.934 -78 38 16.08 V W68
2025-11-12 00:24:22 C 20 50 08.616 -78 38 24.18 V W68
2025-11-12 00:38:38 C 20 50 05.820 -78 38 39.12 V W68
2025-11-13 18:25:05 C 20 42 32.126 -79 22 43.21 V M22
2025-11-13 18:29:44 C 20 42 31.236 -79 22 47.60 V M22
2025-11-13 18:37:39 C 20 42 29.645 -79 22 55.52 V M22
2025-11-13 18:54:55 C 20 42 26.134 -79 23 12.66 V M22
2025-11-15 00:15:50 C 20 36 33.758 -79 53 01.03 V W68
2025-11-15 00:19:56 C 20 36 32.988 -79 53 04.74 V W68
2025-11-15 00:27:20 C 20 36 31.222 -79 53 12.05 V W68
2025-11-15 00:42:11 C 20 36 27.946 -79 53 26.27 V W68
2025-11-16 00:16:55 C 20 31 21.178 -80 16 39.00 V W68
2025-11-16 00:21:01 C 20 31 19.956 -80 16 42.89 V W68
2025-11-16 00:29:06 C 20 31 18.151 -80 16 50.41 V W68
2025-11-16 00:43:56 C 20 31 14.566 -80 17 03.84 V W68
2025-11-16 18:17:27 C 20 27 10.634 -80 33 55.08 V M22
2025-11-16 18:21:31 C 20 27 09.581 -80 33 58.93 V M22
2025-11-16 18:29:32 C 20 27 07.603 -80 34 05.92 V M22
2025-11-16 18:44:12 C 20 27 03.895 -80 34 19.45 V M22
2025-11-19 00:20:35 C 20 13 04.368 -81 23 23.42 V W68
2025-11-19 00:25:26 C 20 13 02.962 -81 23 27.31 V W68
2025-11-19 00:32:54 C 20 13 00.686 -81 23 33.72 V W68
2025-11-19 00:48:25 C 20 12 56.066 -81 23 46.90 V W68
2025-11-19 18:22:07 C 20 07 45.979 -81 39 01.62 V M22
2025-11-19 18:26:12 C 20 07 44.825 -81 39 05.26 V M22
2025-11-19 18:40:22 C 20 07 40.262 -81 39 16.45 V M22