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
2009-03-21 19:58:00 C 07 03 59.90 +08 17 15.0 c A24
2009-03-21 19:59:26 C 07 04 00.25 +08 17 21.2 c A24
2009-03-21 21:51:19 C 07 04 30.08 +08 25 56.9 c A24
2009-03-21 21:52:46 C 07 04 30.41 +08 26 04.6 c A24
2009-03-28 04:19:47 C 07 42 37.56 +18 23 46.4 16.3 c 704
2009-03-28 04:37:10 C 07 42 41.61 +18 24 44.0 16.6 c 704
2009-03-28 04:54:47 C 07 42 45.71 +18 25 42.6 16.3 c 704
2009-03-28 05:12:23 C 07 42 49.82 +18 26 41.0 16.3 c 704
2009-03-28 05:29:47 C 07 42 53.83 +18 27 38.6 16.5 c 704
2009-04-01 20:21:07 C 08 07 53.67 +23 49 08.4 16.2 r 084
2009-04-01 20:22:38 C 08 07 54.00 +23 49 12.4 16.2 o 084
2009-04-01 20:25:42 C 08 07 54.67 +23 49 20.0 16.4 o 084
2009-04-08 20:30:05 C 08 41 17.01 +29 24 58.2 17.4 o 084
2009-04-08 20:33:09 C 08 41 17.48 +29 25 02.9 17.3 r 084
2009-04-08 20:34:41 C 08 41 17.82 +29 25 05.0 17.3 r 084
2009-04-08 22:49:43 C 08 41 42.42 +29 28 32.2 17.1 o 084
2009-04-14 21:59:57 C 09 06 23.36 +32 28 27.8 v B75
2009-04-14 22:03:54 C 09 06 24.08 +32 28 31.2 v B75
2009-04-15 21:52:50 C 09 10 13.38 +32 51 21.0 r 168
2009-04-15 21:56:20 C 09 10 13.94 +32 51 24.1 r 168
2009-04-15 21:57:40 C 09 10 14.23 +32 51 24.8 r 168
2009-04-15 22:01:05 C 09 10 14.70 +32 51 28.3 r 168
2009-04-15 22:05:30 C 09 10 15.33 +32 51 32.2 r 168
2009-04-18 22:36:32 C 09 21 27.19 +33 51 10.9 17.6 o 084
2009-04-18 23:13:25 C 09 21 32.73 +33 51 39.9 r B12
2009-04-18 23:16:28 C 09 21 33.16 +33 51 42.0 r B12
2009-04-18 23:17:57 C 09 21 33.40 +33 51 43.1 r B12
2009-04-18 23:19:28 C 09 21 33.63 +33 51 44.0 r B12
2009-04-18 23:21:00 C 09 21 33.83 +33 51 45.2 r B12
2009-04-18 23:24:01 C 09 21 34.30 +33 51 47.2 r B12
2009-04-18 23:25:33 C 09 21 34.52 +33 51 48.4 r B12
2009-04-20 22:10:15 C 09 28 27.67 +34 22 57.3 18.2 r 084
2009-04-20 22:13:28 C 09 28 28.10 +34 22 59.2 18.1 r 084
2009-04-21 04:07:58 C 09 29 19.53 +34 26 42.0 r 703
2009-04-21 04:14:06 C 09 29 20.43 +34 26 45.8 r 703
2009-04-21 04:20:11 C 09 29 21.19 +34 26 48.9 r 703
2009-04-21 04:26:17 C 09 29 22.09 +34 26 52.4 r 703
2009-04-21 20:55:38 C 09 31 43.61 +34 36 20.6 17.9 r 084
2009-04-21 21:01:58 C 09 31 44.31 +34 36 25.4 17.7 r C20
2009-05-24 05:15:19 C 11 00 17.78 +35 22 16.3 r 703
2009-05-24 05:27:17 C 11 00 18.90 +35 22 12.3 r 703
2009-05-24 05:51:25 C 11 00 21.16 +35 22 06.6 r 703
2010-05-18 00:21:10 S 21 01 08.816 +24 48 28.12 L C51
2010-05-18 03:31:41 S 21 01 13.522 +24 50 04.29 L C51
2010-05-18 06:42:12 S 21 01 17.868 +24 51 37.08 L C51
2010-05-18 08:17:22 S 21 01 19.851 +24 52 27.97 L C51
2010-05-18 11:27:53 S 21 01 24.153 +24 54 05.18 L C51
2010-05-18 14:38:24 S 21 01 28.581 +24 55 41.11 L C51
2010-07-01 08:28:48 C 20 58 35.55 +32 11 26.0 o H21
2010-07-01 08:37:19 C 20 58 35.26 +32 11 28.1 o H21