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
2026-02-10 08:03:31 C 14 06 15.319 -40 51 28.98 V W68
2026-02-11 05:58:59 C 14 06 08.436 -39 30 23.18 V W68
2026-02-11 06:29:22 C 14 06 08.059 -39 28 30.29 V W68
2026-02-11 07:10:04 C 14 06 07.538 -39 25 58.76 V W68
2026-02-11 07:17:03 C 14 06 07.430 -39 25 32.77 V W68
2026-02-13 12:44:37 C 14 05 35.935 -35 56 43.01 V T05
2026-02-13 12:56:32 C 14 05 35.717 -35 55 55.24 V T05
2026-02-13 13:00:28 C 14 05 35.630 -35 55 39.22 V T05
2026-02-13 13:16:05 C 14 05 35.323 -35 54 36.25 V T05
2026-02-15 06:53:46 C 14 04 57.926 -33 00 01.69 V W68
2026-02-15 06:58:21 C 14 04 57.814 -32 59 42.11 V W68
2026-02-15 07:06:33 C 14 04 57.622 -32 59 06.97 V W68
2026-02-15 07:25:17 C 14 04 57.168 -32 57 46.80 V W68
2026-02-18 11:50:34 C 14 03 18.094 -27 12 02.12 V T05
2026-02-18 12:05:43 C 14 03 17.609 -27 10 50.95 V T05
2026-02-18 12:14:13 C 14 03 17.330 -27 10 10.74 V T05
2026-02-18 12:19:31 C 14 03 17.153 -27 09 45.79 V T05
2026-02-19 12:15:29 C 14 02 37.668 -25 14 38.90 V T05
2026-02-19 12:20:05 C 14 02 37.502 -25 14 16.51 V T05
2026-02-19 12:33:43 C 14 02 37.010 -25 13 10.38 V T05
2026-02-19 12:48:47 C 14 02 36.463 -25 11 57.19 V T05
2026-02-20 01:16:30 C 14 02 14.090 -24 10 24.64 V M22
2026-02-20 01:20:37 C 14 02 13.944 -24 10 04.26 V M22
2026-02-20 01:30:37 C 14 02 13.560 -24 09 15.05 V M22
2026-02-20 01:39:19 C 14 02 13.241 -24 08 32.10 V M22
2026-02-21 04:47:09 B 14 01 20.890 -21 53 03.66 X J51
2026-02-21 05:01:23 B 14 01 20.280 -21 51 51.62 X J51
2026-02-21 05:15:41 B 14 01 19.699 -21 50 38.72 X J51
2026-02-21 06:37:00 C 14 01 17.933 -21 43 19.78 V W68
2026-02-21 07:12:53 C 14 01 16.490 -21 40 17.94 V W68
2026-02-21 07:16:49 C 14 01 16.325 -21 39 58.07 V W68
2026-02-21 07:22:02 C 14 01 16.121 -21 39 31.50 V W68
2026-02-23 05:12:45 B 13 59 35.182 -17 42 16.38 X J51
2026-02-23 05:23:37 B 13 59 34.697 -17 41 19.64 X J51
2026-02-23 05:34:46 B 13 59 34.190 -17 40 21.32 X J51
2026-02-23 10:43:40 C 13 59 22.506 -17 13 09.66 V 703
2026-02-23 10:46:54 C 13 59 22.355 -17 12 52.42 V 703
2026-02-23 10:50:09 C 13 59 22.207 -17 12 35.14 V 703
2026-02-23 10:53:24 C 13 59 22.052 -17 12 18.11 V 703
2026-02-24 04:10:12 C 13 58 41.326 -15 39 46.15 V W68
2026-02-24 04:14:17 C 13 58 41.153 -15 39 24.26 V W68
2026-02-24 04:23:41 C 13 58 40.723 -15 38 34.19 V W68
2026-02-24 05:14:07 C 13 58 38.402 -15 34 05.41 V W68
2026-02-26 02:04:07 B 13 56 38.602 -11 31 58.55 X L65
2026-02-26 02:12:23 B 13 56 38.189 -11 31 13.48 X L65
2026-02-26 02:20:38 B 13 56 37.757 -11 30 28.40 X L65
2026-02-27 00:46:25 C 13 55 33.946 -09 27 31.10 V M52
2026-02-27 01:22:16 C 13 55 31.975 -09 24 14.33 V M52
2026-02-27 01:31:03 B 13 55 31.416 -09 23 30.66 X L65
2026-02-27 01:35:11 B 13 55 31.169 -09 23 06.94 X L65