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
2024-04-21 20:33:01 S 15 12 58.387 +41 45 45.25 V C57
2024-04-21 20:33:01 s 1 -58650.456 0 +142308.94 0.161 C57
2024-04-21 21:53:01 S 15 12 52.567 +41 46 43.72 V C57
2024-04-21 21:53:01 s 1 -62586.552 0 +136028.12 0.174 C57
2024-04-21 22:13:00 S 15 12 50.443 +41 47 02.54 V C57
2024-04-21 22:13:00 s 1 -63558.930 0 +134431.97 0.851 C57
2024-04-21 22:53:01 S 15 12 47.842 +41 47 30.95 V C57
2024-04-21 22:53:01 s 1 -65488.783 0 +131208.50 0.678 C57
2024-04-21 23:13:01 S 15 12 46.382 +41 47 45.74 V C57
2024-04-21 23:13:01 s 1 -66446.060 0 +129581.33 0.7 C57
2024-04-21 23:33:01 S 15 12 44.688 +41 47 57.16 V C57
2024-04-21 23:33:01 s 1 -67398.023 0 +127943.82 0.554 C57
2024-04-21 23:53:01 S 15 12 43.363 +41 48 11.77 V C57
2024-04-21 23:53:01 s 1 -68344.569 0 +126296.04 0.176 C57
2024-04-22 00:13:01 S 15 12 42.187 +41 48 30.06 V C57
2024-04-22 00:13:01 s 1 -69285.595 0 +124638.08 0.503 C57
2024-04-22 00:33:01 S 15 12 40.570 +41 48 40.07 V C57
2024-04-22 00:33:01 s 1 -70220.912 0 +122969.85 0.309 C57
2024-04-22 00:53:01 S 15 12 39.182 +41 48 56.02 V C57
2024-04-22 00:53:01 s 1 -71150.413 0 +121291.46 0.531 C57
2024-04-22 01:33:01 S 15 12 35.983 +41 49 28.24 V C57
2024-04-22 01:33:01 s 1 -72991.449 0 +117904.35 0.798 C57
2024-04-22 01:53:01 S 15 12 34.258 +41 49 39.11 V C57
2024-04-22 01:53:01 s 1 -73902.676 0 +116195.66 0.55 C57
2024-04-22 02:13:01 S 15 12 33.146 +41 49 52.07 V C57
2024-04-22 02:13:01 s 1 -74807.562 0 +114477.02 0.295 C57
2024-04-22 03:53:00 S 15 12 25.932 +41 51 01.62 V C57
2024-04-22 03:53:00 s 1 -79231.186 0 +105735.13 0.604 C57
2024-04-22 06:33:01 S 15 12 12.979 +41 53 07.19 V C57
2024-04-22 06:33:01 s 1 -85923.159 0 +91248.365 0.315 C57
2024-04-22 09:33:00 S 15 11 59.753 +41 55 20.06 V C57
2024-04-22 09:33:00 s 1 -92793.299 0 +74260.542 0.79 C57
2024-04-22 09:44:34 C 15 11 45.208 +41 57 20.41 V 703
2024-04-22 09:47:36 C 15 11 45.049 +41 57 23.15 V 703
2024-04-22 09:50:37 C 15 11 44.786 +41 57 26.17 V 703
2024-04-22 09:53:39 C 15 11 44.545 +41 57 28.15 V 703
2024-04-22 10:13:00 S 15 11 56.947 +41 55 46.24 V C57
2024-04-22 10:13:00 s 1 -94213.447 0 +70393.432 0.945 C57
2024-04-22 10:33:01 S 15 11 55.138 +41 56 01.21 V C57
2024-04-22 10:33:01 s 1 -94907.895 0 +68448.049 0.402 C57
2024-04-22 10:53:01 S 15 11 53.995 +41 56 19.54 V C57
2024-04-22 10:53:01 s 1 -95591.700 0 +66494.979 0.649 C57
2024-04-22 10:53:49 C 15 11 40.558 +41 58 07.10 V T05
2024-04-22 10:58:22 C 15 11 40.207 +41 58 10.49 V T05
2024-04-22 11:02:47 C 15 11 39.845 +41 58 13.55 V T05
2024-04-22 11:23:47 C 15 11 38.280 +41 58 27.03 X F51
2024-04-22 11:32:16 C 15 11 37.692 +41 58 33.02 V T05
2024-04-22 11:33:01 S 15 11 50.861 +41 56 46.93 V C57
2024-04-22 11:33:01 s 1 -96926.708 0 +62566.400 0.133 C57
2024-04-22 11:38:59 C 15 11 37.144 +41 58 36.73 X F51