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
1990-03-22 02:45:59 A 08 45 09.22 +19 29 46.3 801
1990-03-23 01:58:21 A 08 49 34.82 +21 06 28.7 801
1990-03-23 02:01:35 A 08 49 35.40 +21 06 41.5 801
1991-08-07 05:54:41 C 20 27 33.08 +29 18 41.1 688
1993-07-25 08:22:05 C 19 33 20.26 +32 51 46.8 z 658
1995-07-19 10:28:43 C 18 42 26.91 +34 32 14.1 c 608
1995-07-19 11:22:05 C 18 42 23.67 +34 31 50.0 c 608
1995-07-27 06:50:25 C 18 31 59.24 +32 52 44.4 711
1995-07-27 09:03:30 C 18 31 52.36 +32 51 25.2 c 608
1995-07-27 10:47:34 C 18 31 46.83 +32 50 21.3 c 608
1995-08-03 10:01:44 C 18 23 50.01 +30 57 35.3 c 608
1995-08-03 10:42:48 C 18 23 48.19 +30 57 05.3 c 608
1997-07-05 10:35:36 C 18 06 37.54 +37 02 37.0 c 608
1997-07-05 11:29:39 C 18 06 34.29 +37 02 20.7 c 608
1997-07-12 10:08:32 C 17 57 07.88 +36 00 51.7 c 608
1997-07-12 11:02:22 C 17 57 04.89 +36 00 27.9 c 608
1997-07-13 10:24:10 C 17 55 50.19 +35 49 59.2 c 608
1997-07-13 11:24:26 C 17 55 46.94 +35 49 31.4 c 608
2003-03-13 11:13:10 C 16 57 36.86 +19 22 36.3 c 673
2003-03-13 11:22:50 C 16 57 36.95 +19 22 44.2 c 673
2003-03-13 11:31:50 C 16 57 37.25 +19 22 55.8 c 673
2003-03-13 11:40:50 C 16 57 37.63 +19 23 10.2 c 673
2003-03-19 09:49:20 C 17 01 16.73 +22 00 49.6 c 673
2003-03-19 09:56:09 C 17 01 16.84 +22 00 58.2 c 673
2003-03-19 10:07:09 C 17 01 17.04 +22 01 09.0 c 673
2003-03-19 10:16:00 C 17 01 17.20 +22 01 19.4 c 673
2003-03-26 10:07:38 C 17 03 52.58 +25 09 05.7 18.9 c 704
2003-03-26 10:24:29 C 17 03 52.83 +25 09 24.9 20.1 c 704
2003-03-26 10:41:09 C 17 03 52.84 +25 09 43.5 19.2 c 704
2003-03-26 10:57:48 C 17 03 52.97 +25 10 01.9 20.1 c 704
2003-03-26 11:14:27 C 17 03 53.03 +25 10 23.2 19.8 c 704
2003-03-28 06:18:54 C 17 04 13.52 +25 58 22.7 c 950
2003-03-28 06:19:46 C 17 04 13.52 +25 58 23.3 c 950
2003-03-28 06:20:39 C 17 04 13.52 +25 58 24.2 c 950
2003-03-28 06:21:31 C 17 04 13.53 +25 58 25.3 c 950
2003-04-22 08:55:05 C 16 54 18.31 +36 09 30.4 18.7 c 704
2003-04-22 09:12:42 C 16 54 17.70 +36 09 46.1 18.6 c 704
2003-04-22 09:28:09 C 16 54 16.92 +36 09 59.4 18.5 c 704
2003-04-22 09:43:34 C 16 54 16.30 +36 10 12.1 19.0 c 704
2003-05-04 21:09:07 C 16 39 33.91 +39 46 08.3 c 240
2003-05-04 21:10:55 C 16 39 33.81 +39 46 09.3 c 240
2003-05-04 21:14:31 C 16 39 33.60 +39 46 11.4 c 240
2003-05-04 21:23:31 C 16 39 33.08 +39 46 17.1 c 240
2003-05-04 21:25:19 C 16 39 32.98 +39 46 18.0 c 240
2003-05-04 21:30:42 C 16 39 32.68 +39 46 21.5 c 240
2004-07-24 10:35:44 C 02 18 43.81 +13 21 23.1 c 670
2004-07-24 11:59:35 C 02 18 56.57 +13 20 33.3 c 670
2004-10-23 17:27:03 C 10 17 53.28 -28 25 04.8 r E12
2004-10-23 17:39:15 C 10 17 55.47 -28 25 04.6 r E12
2004-10-23 17:51:29 C 10 17 57.58 -28 25 04.4 r E12