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
2007-02-23 11:02:44 C 14 37 27.55 -06 07 22.5 r 703
2007-02-23 11:27:18 C 14 37 27.37 -06 05 51.6 r 703
2007-02-23 11:39:39 C 14 37 27.26 -06 05 05.2 r 703
2007-02-24 03:14:30 C 14 37 23.60 -05 07 16.2 16.1 r 084
2007-02-24 03:16:38 C 14 37 23.59 -05 07 08.5 16.0 r 084
2007-02-26 03:19:52 C 14 37 01.89 -02 07 07.6 16.0 r 084
2007-02-26 03:22:01 C 14 37 01.85 -02 06 59.5 15.9 r 084
2007-03-10 07:59:10 C 14 28 52.98 +15 49 04.7 15.9 c 704
2007-03-10 08:14:57 C 14 28 52.21 +15 49 59.3 16.1 c 704
2007-03-10 08:30:44 C 14 28 51.43 +15 50 53.5 16.2 c 704
2007-03-10 08:46:27 C 14 28 50.66 +15 51 47.3 16.0 c 704
2007-03-10 09:02:04 C 14 28 49.89 +15 52 41.2 16.0 c 704
2007-03-12 03:07:55 C 14 26 49.49 +18 14 26.5 c A24
2007-03-12 03:09:21 C 14 26 49.40 +18 14 31.4 c A24
2007-03-12 03:47:06 C 14 26 47.39 +18 16 36.0 c A24
2007-03-12 03:48:31 C 14 26 47.33 +18 16 40.5 c A24
2007-03-12 04:24:51 C 14 26 45.38 +18 18 40.3 c A24
2007-03-12 04:26:16 C 14 26 45.30 +18 18 44.9 c A24
2007-03-13 00:31:28 C 14 25 44.76 +19 24 29.0 c A24
2007-03-13 00:47:19 C 14 25 43.87 +19 25 20.3 c A24
2007-03-13 01:03:05 C 14 25 42.98 +19 26 11.3 c A24
2007-03-13 01:20:40 C 14 25 42.00 +19 27 08.2 c A24
2007-03-13 01:35:25 C 14 25 41.17 +19 27 55.9 c A24
2007-03-13 01:55:33 C 14 25 40.04 +19 29 01.1 c A24
2007-03-13 02:12:49 C 14 25 39.07 +19 29 56.9 c A24
2007-03-13 02:30:55 C 14 25 38.05 +19 30 55.5 c A24
2007-03-13 02:50:21 C 14 25 36.96 +19 31 58.3 c A24
2007-03-13 02:51:47 C 14 25 36.87 +19 32 03.1 c A24
2007-03-13 03:04:37 C 14 25 36.16 +19 32 44.5 c A24
2007-03-13 03:16:43 C 14 25 35.49 +19 33 23.4 c A24
2007-03-13 03:28:28 C 14 25 34.84 +19 34 01.2 c A24
2007-03-13 03:29:54 C 14 25 34.74 +19 34 06.0 c A24
2007-03-13 03:42:41 C 14 25 34.02 +19 34 47.0 c A24
2007-03-13 03:54:44 C 14 25 33.34 +19 35 26.0 c A24
2007-03-13 04:06:26 C 14 25 32.68 +19 36 03.9 c A24
2007-03-13 04:07:52 C 14 25 32.60 +19 36 08.4 c A24
2007-03-13 04:16:45 C 14 25 32.10 +19 36 37.3 c A24
2007-03-14 00:37:46 C 14 24 27.70 +20 41 38.1 c A24
2007-03-14 00:53:11 C 14 24 26.79 +20 42 26.7 c A24
2007-03-14 01:08:49 C 14 24 25.87 +20 43 16.0 c A24
2007-03-14 01:24:48 C 14 24 24.92 +20 44 06.4 c A24
2007-03-14 01:40:33 C 14 24 23.99 +20 44 56.1 c A24
2007-03-14 01:56:06 C 14 24 23.08 +20 45 45.1 c A24
2007-03-14 02:13:31 C 14 24 22.05 +20 46 40.0 c A24
2007-03-14 02:31:09 C 14 24 21.01 +20 47 35.8 c A24
2007-03-14 02:53:01 C 14 24 19.72 +20 48 44.6 c A24
2007-03-14 02:54:27 C 14 24 19.63 +20 48 49.2 c A24
2007-03-14 03:07:12 C 14 24 18.88 +20 49 29.4 c A24
2007-03-14 03:19:15 C 14 24 18.18 +20 50 07.3 c A24
2007-03-14 03:30:56 C 14 24 17.50 +20 50 44.0 c A24