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
2025-09-03 19:49:01 B 23 26 56.15 +07 18 40.6 X L76
2025-09-04 07:20:51 C 23 26 26.80 +06 45 09.8 q U55
2025-09-04 07:29:15 C 23 26 26.43 +06 44 45.4 q U55
2025-09-04 07:39:00 C 23 26 25.96 +06 44 16.1 q U55
2025-09-04 20:07:40 C 23 25 53.68 +06 07 06.0 X C40
2025-09-04 20:10:05 C 23 25 53.56 +06 06 58.8 X C40
2025-09-04 20:12:30 C 23 25 53.45 +06 06 51.5 X C40
2025-09-04 20:14:54 C 23 25 53.33 +06 06 44.2 X C40
2025-09-04 20:17:19 C 23 25 53.22 +06 06 37.0 X C40
2025-09-04 20:18:54 B 23 25 53.12 +06 06 31.7 X L76
2025-09-04 20:19:44 C 23 25 53.11 +06 06 29.7 X C40
2025-09-04 20:22:10 C 23 25 52.99 +06 06 22.4 X C40
2025-09-04 20:24:14 B 23 25 52.87 +06 06 15.6 X L76
2025-09-04 20:24:34 C 23 25 52.87 +06 06 15.1 X C40
2025-09-04 20:26:52 C 23 25 52.76 +06 06 08.1 X C40
2025-09-04 20:29:05 C 23 25 52.66 +06 06 01.4 X C40
2025-09-04 20:29:30 C 23 25 52.61 +06 06 00.2 X D04
2025-09-04 20:29:33 B 23 25 52.62 +06 05 59.5 X L76
2025-09-04 20:31:18 C 23 25 52.56 +06 05 54.8 X C40
2025-09-04 20:32:40 C 23 25 52.49 +06 05 50.7 X D04
2025-09-04 20:33:31 C 23 25 52.45 +06 05 48.1 X C40
2025-09-04 20:34:51 B 23 25 52.36 +06 05 43.6 X L76
2025-09-04 20:39:02 C 23 25 52.18 +06 05 31.8 X D04
2025-09-04 20:40:07 B 23 25 52.11 +06 05 27.7 X L76
2025-09-04 20:45:24 B 23 25 51.85 +06 05 11.7 X L76
2025-09-04 20:45:24 C 23 25 51.88 +06 05 12.4 X D04
2025-09-04 20:51:46 C 23 25 51.60 +06 04 53.3 X D04
2025-09-04 20:54:57 C 23 25 51.42 +06 04 43.7 X D04
2025-09-04 21:01:20 C 23 25 51.12 +06 04 24.0 X D04
2025-09-04 21:04:31 C 23 25 50.96 +06 04 14.9 X D04
2025-09-05 01:01:00 C 23 25 40.109 +05 52 15.35 Z C23
2025-09-05 01:25:15 C 23 25 39.055 +05 51 01.04 W J95
2025-09-05 01:38:22 C 23 25 38.422 +05 50 21.01 W J95
2025-09-05 01:39:13 C 23 25 38.290 +05 50 18.53 Z C23
2025-09-05 01:53:16 C 23 25 37.711 +05 49 35.54 W J95
2025-09-05 02:05:53 C 23 25 37.104 +05 48 56.99 W J95
2025-09-05 03:57:47 C 23 25 31.687 +05 43 14.70 Z C23
2025-09-05 05:26:37 C 23 25 27.463 +05 38 48.01 V R17
2025-09-05 05:32:02 C 23 25 27.199 +05 38 31.38 V R17
2025-09-05 05:38:41 C 23 25 26.890 +05 38 10.79 V R17
2025-09-05 05:43:57 C 23 25 26.635 +05 37 54.41 V R17
2025-09-05 19:52:43 B 23 24 49.50 +04 53 42.4 X L76
2025-09-05 19:57:59 B 23 24 49.25 +04 53 25.8 X L76
2025-09-05 20:03:15 B 23 24 48.99 +04 53 09.1 X L76
2025-09-05 20:08:32 B 23 24 48.73 +04 52 52.3 X L76
2025-09-05 20:13:48 B 23 24 48.46 +04 52 35.7 X L76
2025-09-05 20:19:06 B 23 24 48.19 +04 52 19.1 X L76
2025-09-05 21:34:35 C 23 24 44.875 +04 48 18.14 Z C23
2025-09-05 21:40:02 C 23 24 44.710 +04 48 01.44 V D76
2025-09-05 21:42:00 C 23 24 44.05 +04 47 56.8 X C40