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
2025-09-14 23:43:56 B 23 12 19.70 -09 11 02.5 X L76
2025-09-14 23:45:57 B 23 12 19.54 -09 11 11.5 X L76
2025-09-14 23:47:58 B 23 12 19.40 -09 11 20.4 X L76
2025-09-15 05:58:23 C 23 11 54.473 -09 38 39.01 V W68
2025-09-15 06:02:57 C 23 11 54.142 -09 38 59.68 V W68
2025-09-15 06:14:50 C 23 11 53.268 -09 39 53.17 V W68
2025-09-15 06:30:00 C 23 11 52.159 -09 41 01.61 V W68
2025-09-15 10:23:38 C 23 11 36.833 -09 59 00.12 X F52
2025-09-15 10:40:12 C 23 11 35.589 -10 00 15.14 X F52
2025-09-15 10:56:44 C 23 11 34.337 -10 01 30.79 X F52
2025-09-15 11:13:17 C 23 11 33.097 -10 02 45.90 X F52
2025-09-15 16:03:22 C 23 11 13.51 -10 24 50.4 V D29
2025-09-15 16:23:44 C 23 11 11.98 -10 26 23.3 V D29
2025-09-15 16:44:06 C 23 11 10.46 -10 27 56.1 V D29
2025-09-15 20:21:39 B 23 10 55.95 -10 44 35.5 X L76
2025-09-15 20:24:36 B 23 10 55.74 -10 44 49.0 X L76
2025-09-15 20:27:33 B 23 10 55.53 -10 45 02.6 X L76
2025-09-15 20:30:28 B 23 10 55.30 -10 45 16.0 X L76
2025-09-15 20:33:24 B 23 10 55.08 -10 45 29.3 X L76
2025-09-15 20:36:20 B 23 10 54.87 -10 45 42.8 X L76
2025-09-15 20:39:16 B 23 10 54.66 -10 45 56.1 X L76
2025-09-15 20:42:12 B 23 10 54.44 -10 46 09.5 X L76
2025-09-15 20:45:08 B 23 10 54.23 -10 46 22.8 X L76
2025-09-15 20:48:04 B 23 10 54.00 -10 46 36.4 X L76
2025-09-15 21:49:21 B 23 10 50.009 -10 51 17.24 V 160
2025-09-15 21:53:49 B 23 10 49.675 -10 51 37.80 V 160
2025-09-15 21:58:12 B 23 10 49.346 -10 51 57.85 V 160
2025-09-17 19:22:17 C 23 07 34.61 -14 24 49.9 X L18
2025-09-17 19:23:20 C 23 07 34.58 -14 24 55.4 X L18
2025-09-17 19:24:24 C 23 07 34.47 -14 25 00.6 X L18
2025-09-17 19:25:28 C 23 07 34.44 -14 25 05.9 X L18
2025-09-17 19:26:31 C 23 07 34.29 -14 25 11.2 X L18
2025-09-17 19:43:50 C 23 07 33.05 -14 26 33.5 V M32
2025-09-17 19:46:03 C 23 07 32.87 -14 26 44.2 V M32
2025-09-17 19:48:16 C 23 07 32.71 -14 26 54.6 V M32
2025-09-17 19:50:30 C 23 07 32.53 -14 27 05.3 V M32
2025-09-17 19:52:45 C 23 07 32.33 -14 27 16.3 V M32
2025-09-18 02:59:49 C 23 07 00.562 -15 00 54.22 V W68
2025-09-18 03:02:26 C 23 07 00.350 -15 01 06.78 V W68
2025-09-18 03:07:39 C 23 06 59.930 -15 01 31.84 V W68
2025-09-18 03:49:26 C 23 06 56.549 -15 04 52.86 V W68
2025-09-18 20:09:14 B 23 05 43.546 -16 24 16.31 V 160
2025-09-18 20:12:32 B 23 05 43.272 -16 24 32.00 V 160
2025-09-18 20:15:45 B 23 05 43.025 -16 24 47.66 V 160
2025-09-18 22:06:46 C 23 05 34.104 -16 33 49.50 Z C23
2025-09-18 22:31:33 C 23 05 32.098 -16 35 50.32 Z C23
2025-09-19 00:38:31 C 23 05 21.864 -16 46 06.02 Z C23
2025-09-19 21:22:46 C 23 03 46.663 -18 27 43.13 Z C23
2025-09-19 21:39:48 C 23 03 45.254 -18 29 07.15 Z C23
2025-09-19 21:52:13 C 23 03 44.174 -18 30 07.78 Z C23