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
2026-01-06 08:19:01 C 13 53 32.863 -71 47 09.06 V W68
2026-01-12 08:02:24 C 13 55 06.749 -68 13 48.25 V W68
2026-01-12 08:04:34 C 13 55 06.782 -68 13 44.98 V W68
2026-01-12 08:40:25 C 13 55 07.097 -68 12 49.97 V W68
2026-01-13 01:43:02 C 13 55 26.510 -67 45 51.59 V M22
2026-01-13 02:30:13 C 13 55 27.084 -67 44 38.15 V M22
2026-01-13 02:34:12 C 13 55 27.156 -67 44 32.17 V M22
2026-01-15 08:05:41 C 13 56 33.823 -66 17 18.49 V W68
2026-01-15 08:09:42 C 13 56 33.893 -66 17 11.98 V W68
2026-01-15 08:18:00 C 13 56 34.006 -66 16 58.58 V W68
2026-01-18 22:30:11 C 13 58 34.589 -63 47 06.43 V M22
2026-01-18 23:24:59 C 13 58 35.916 -63 45 30.35 V M22
2026-01-18 23:51:03 C 13 58 36.480 -63 44 44.48 V M22
2026-01-22 01:58:52 C 14 00 22.226 -61 25 16.72 V M22
2026-01-22 02:05:02 C 14 00 22.334 -61 25 04.80 V M22
2026-01-22 02:30:43 C 14 00 22.745 -61 24 15.34 V M22
2026-01-23 07:53:39 C 14 01 04.310 -60 25 44.18 V W68
2026-01-23 07:59:00 C 14 01 04.392 -60 25 33.49 V W68
2026-01-23 08:34:13 C 14 01 04.949 -60 24 23.36 V W68
2026-01-24 08:14:48 C 14 01 37.488 -59 35 45.64 V W68
2026-01-24 08:39:27 C 14 01 37.800 -59 34 55.09 V W68
2026-01-24 08:47:37 C 14 01 37.937 -59 34 38.28 V W68
2026-01-25 02:01:16 C 14 02 01.198 -58 58 21.65 V M22
2026-01-25 02:07:22 C 14 02 01.284 -58 58 08.90 V M22
2026-01-25 02:39:31 C 14 02 01.742 -58 57 01.66 V M22
2026-01-30 07:45:33 C 14 04 27.814 -54 09 09.50 V W68
2026-01-30 08:06:21 C 14 04 28.001 -54 08 18.38 V W68
2026-01-30 08:16:38 C 14 04 28.094 -54 07 53.08 V W68
2026-01-31 01:23:16 C 14 04 44.664 -53 24 42.08 V M22
2026-01-31 01:29:10 C 14 04 44.712 -53 24 27.32 V M22
2026-01-31 01:37:44 C 14 04 44.784 -53 24 05.62 V M22
2026-01-31 01:59:55 C 14 04 44.962 -53 23 09.92 V M22
2026-02-02 07:03:02 C 14 05 28.730 -51 02 39.70 V W68
2026-02-02 07:07:43 C 14 05 28.776 -51 02 27.24 V W68
2026-02-02 07:47:55 C 14 05 28.970 -51 00 38.30 V W68
2026-02-02 08:00:37 C 14 05 29.045 -51 00 03.74 V W68
2026-02-05 07:52:14 C 14 06 08.371 -47 32 01.10 V W68
2026-02-05 07:56:56 C 14 06 08.378 -47 31 46.99 V W68
2026-02-05 08:05:03 C 14 06 08.376 -47 31 22.30 V W68
2026-02-05 08:15:49 C 14 06 08.362 -47 30 49.75 V W68
2026-02-07 07:56:58 C 14 06 20.647 -45 00 14.62 V W68
2026-02-07 08:04:13 C 14 06 20.609 -44 59 51.11 V W68
2026-02-07 08:20:14 C 14 06 20.515 -44 58 59.12 V W68
2026-02-08 07:29:14 C 14 06 22.361 -43 41 55.32 V W68
2026-02-08 07:34:34 C 14 06 22.330 -43 41 37.68 V W68
2026-02-08 07:50:47 C 14 06 22.214 -43 40 43.25 V W68
2026-02-08 07:58:53 C 14 06 22.162 -43 40 15.89 V W68
2026-02-10 07:35:04 C 14 06 15.648 -40 53 11.69 V W68
2026-02-10 07:39:09 C 14 06 15.614 -40 52 57.04 V W68
2026-02-10 07:47:20 C 14 06 15.506 -40 52 27.55 V W68