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
2008-09-08 04:25:09 C 20 51 37.96 +10 56 06.8 o H47
2008-09-10 19:45:12 C 20 47 40.26 +08 46 09.5 17.1 r 084
2008-09-10 22:33:16 C 20 47 29.87 +08 40 17.9 16.7 r 084
2008-09-11 23:30:56 C 20 46 00.98 +07 47 57.4 c J40
2008-09-11 23:46:57 C 20 46 00.01 +07 47 23.6 c J40
2008-09-12 00:04:30 C 20 45 58.88 +07 46 46.5 c J40
2008-09-12 00:45:19 C 20 45 56.47 +07 45 19.8 c J40
2008-09-14 23:10:05 C 20 42 01.49 +05 14 36.7 v 204
2008-09-14 23:56:54 C 20 41 58.92 +05 12 55.3 v 204
2008-09-15 00:05:01 C 20 41 58.48 +05 12 37.6 v 204
2008-09-21 04:54:51 C 20 35 05.02 -00 13 08.0 r 703
2008-09-21 05:04:04 C 20 35 04.63 -00 13 28.2 r 703
2008-09-21 05:13:18 C 20 35 04.20 -00 13 48.7 r 703
2008-09-21 20:54:22 C 20 34 27.62 -00 48 21.1 17.8 r 084
2008-09-22 04:00:18 C 20 34 11.76 -01 03 52.2 17.4 c 704
2008-09-22 04:17:37 C 20 34 11.08 -01 04 30.2 18.0 c 704
2008-09-22 04:34:57 C 20 34 10.40 -01 05 07.9 17.8 c 704
2008-09-22 04:52:16 C 20 34 09.68 -01 05 46.2 17.8 c 704
2008-09-22 05:09:36 C 20 34 09.01 -01 06 24.2 17.8 c 704
2008-09-22 19:11:24 C 20 33 38.31 -01 37 13.9 17.7 r 084
2008-09-28 03:07:01 C 20 29 50.98 -06 14 06.1 o H47
2008-09-28 03:25:43 C 20 29 50.58 -06 14 46.0 o H47
2008-10-15 09:45:44 C 20 28 59.12 -19 33 53.6 r E12
2008-10-15 10:05:06 C 20 28 59.41 -19 34 25.5 r E12
2008-10-15 10:24:23 C 20 28 59.70 -19 34 57.9 r E12
2008-10-21 09:36:30 C 20 32 34.58 -23 26 19.5 r E12
2008-10-21 09:52:57 C 20 32 35.01 -23 26 44.5 r E12
2008-10-21 10:25:54 C 20 32 35.98 -23 27 34.6 r E12
2008-12-08 10:29:23 C 21 59 32.31 -43 37 23.3 r E12
2008-12-08 10:36:40 C 21 59 33.18 -43 37 28.5 r E12
2008-12-08 10:43:56 C 21 59 33.90 -43 37 33.4 r E12
2008-12-08 10:51:13 C 21 59 34.76 -43 37 38.3 r E12
2009-01-14 10:26:55 C 00 04 19.56 -51 11 23.1 r 432
2009-01-14 11:15:26 C 00 04 27.78 -51 11 34.8 r 432
2009-01-15 10:00:12 C 00 08 22.39 -51 17 25.9 r 432
2009-01-15 10:51:01 C 00 08 31.10 -51 17 36.6 r 432
2009-01-28 10:06:48 C 01 07 09.52 -51 43 22.2 r 432
2009-01-28 10:21:12 C 01 07 12.36 -51 43 19.8 r 432
2009-01-28 10:31:13 C 01 07 14.47 -51 43 18.6 r 432
2009-01-29 10:03:15 C 01 12 08.13 -51 40 03.3 r 432
2009-01-29 10:19:59 C 01 12 11.61 -51 39 59.8 r 432
2009-01-29 10:41:36 C 01 12 16.10 -51 39 56.2 r 432
2009-03-09 10:22:52 C 05 35 19.17 -18 10 06.0 r E12
2009-03-09 10:38:13 C 05 35 24.00 -18 08 44.0 r E12
2009-03-09 10:53:35 C 05 35 28.82 -18 07 20.8 r E12
2009-03-09 11:08:57 C 05 35 33.64 -18 05 58.1 r E12
2009-03-20 19:02:36 C 06 57 12.44 +06 19 35.4 v 434
2009-03-20 19:06:15 C 06 57 13.42 +06 19 52.4 v 434
2009-03-20 19:07:31 C 06 57 13.77 +06 19 58.8 v 434
2009-03-20 19:09:14 C 06 57 14.24 +06 20 07.3 v 434