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
2004-10-23 18:03:42 C 10 17 59.75 -28 25 04.8 r E12
2005-03-13 07:46:38 C 16 06 41.47 +20 16 57.0 18.9 c 704
2005-03-13 08:02:13 C 16 06 41.62 +20 17 22.7 18.7 c 704
2005-03-13 08:17:50 C 16 06 41.71 +20 17 47.7 19.0 c 704
2005-03-13 08:33:25 C 16 06 41.90 +20 18 13.0 18.9 c 704
2005-03-13 08:49:25 C 16 06 42.04 +20 18 39.5 19.0 c 704
2005-04-01 10:13:04 C 16 01 38.23 +31 52 58.3 r 703
2005-04-01 10:28:30 C 16 01 37.76 +31 53 20.0 r 703
2005-04-01 10:43:52 C 16 01 37.19 +31 53 40.7 r 703
2005-04-01 10:59:18 C 16 01 36.58 +31 54 02.5 r 703
2005-04-07 10:39:51 C 15 56 02.97 +34 59 15.7 r 703
2005-04-07 10:54:06 C 15 56 02.29 +34 59 33.2 r 703
2005-04-07 11:07:01 C 15 56 01.69 +34 59 49.0 r 703
2005-04-07 11:19:37 C 15 56 01.06 +35 00 04.0 r 703
2005-04-14 09:46:41 C 15 47 26.84 +38 04 03.9 r 703
2005-04-14 09:59:13 C 15 47 26.12 +38 04 16.2 r 703
2005-04-14 10:12:04 C 15 47 25.35 +38 04 28.6 r 703
2005-04-14 10:24:24 C 15 47 24.59 +38 04 41.4 r 703
2005-04-15 07:40:05 C 15 46 10.70 +38 25 31.9 18.5 c 704
2005-04-15 07:54:13 C 15 46 09.90 +38 25 45.6 18.9 c 704
2005-04-15 08:08:21 C 15 46 08.99 +38 25 59.5 18.7 c 704
2005-04-15 08:23:16 C 15 46 08.05 +38 26 13.9 18.7 c 704
2005-04-15 08:38:52 C 15 46 07.12 +38 26 28.7 19.1 c 704
2005-04-17 09:21:20 C 15 43 10.36 +39 11 48.0 o 699
2005-04-17 09:49:36 C 15 43 08.51 +39 12 12.9 o 699
2005-04-17 10:17:52 C 15 43 06.63 +39 12 37.9 o 699
2005-04-17 10:46:06 C 15 43 04.87 +39 13 04.1 o 699
2005-04-20 06:53:00 C 15 38 45.09 +40 10 38.4 19.7 c 704
2005-04-20 07:06:12 C 15 38 44.18 +40 10 49.3 19.6 c 704
2005-04-20 07:19:11 C 15 38 43.32 +40 10 59.8 19.2 c 704
2005-04-20 07:33:42 C 15 38 42.31 +40 11 10.8 19.2 c 704
2005-04-28 22:33:56 C 15 24 27.26 +42 24 37.6 r 170
2005-04-28 22:36:10 C 15 24 27.14 +42 24 38.6 r 170
2005-04-28 22:40:37 C 15 24 26.84 +42 24 41.1 r 170
2005-04-30 07:18:46 C 15 22 07.18 +42 40 04.8 19.1 c 704
2005-04-30 07:34:23 C 15 22 05.98 +42 40 12.1 19.3 c 704
2005-04-30 07:51:28 C 15 22 04.78 +42 40 19.2 19.0 c 704
2005-04-30 08:08:04 C 15 22 03.69 +42 40 28.4 19.9 c 704
2005-04-30 08:24:00 C 15 22 02.38 +42 40 34.9 19.4 c 704
2005-06-05 05:32:01 C 14 34 06.70 +41 47 18.8 r 703
2005-06-05 05:43:56 C 14 34 06.31 +41 47 13.5 r 703
2005-06-05 05:55:44 C 14 34 06.02 +41 47 08.0 r 703
2005-06-05 06:07:31 C 14 34 05.59 +41 47 02.8 r 703
2005-06-13 05:36:05 C 14 29 45.49 +40 14 23.7 r 703
2005-06-13 05:48:00 C 14 29 45.09 +40 14 16.9 r 703
2005-06-13 05:59:49 C 14 29 44.91 +40 14 11.0 r 703
2005-06-13 06:11:43 C 14 29 44.70 +40 14 05.4 r 703
2005-06-13 06:32:50 C 14 29 44.44 +40 13 54.0 r 703
2005-06-13 06:46:59 C 14 29 44.05 +40 13 46.3 r 703
2005-06-13 07:01:12 C 14 29 43.87 +40 13 38.5 r 703