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 09:33:01 S 15 13 45.965 +41 37 42.74 V C57
2024-04-21 09:33:01 s 1 -24147.016 0 +187769.24 0.415 C57
2024-04-21 09:53:01 S 15 13 44.558 +41 37 59.02 V C57
2024-04-21 09:53:01 s 1 -25228.102 0 +186556.30 0.955 C57
2024-04-21 10:13:01 S 15 13 43.126 +41 38 13.70 V C57
2024-04-21 10:13:01 s 1 -26307.803 0 +185333.31 0.382 C57
2024-04-21 10:33:01 S 15 13 41.801 +41 38 31.56 V C57
2024-04-21 10:33:01 s 1 -27386.036 0 +184100.14 0.55 C57
2024-04-21 10:53:01 S 15 13 40.404 +41 38 44.74 V C57
2024-04-21 10:53:01 s 1 -28462.733 0 +182856.83 0.408 C57
2024-04-21 11:13:01 S 15 13 39.072 +41 38 58.67 V C57
2024-04-21 11:13:01 s 1 -29537.831 0 +181603.39 0.905 C57
2024-04-21 11:53:01 S 15 13 35.635 +41 39 31.43 V C57
2024-04-21 11:53:01 s 1 -31682.889 0 +179065.82 0.312 C57
2024-04-21 12:13:01 S 15 13 34.493 +41 39 41.47 V C57
2024-04-21 12:13:01 s 1 -32752.714 0 +177781.75 0.117 C57
2024-04-21 12:53:01 S 15 13 31.793 +41 40 13.62 V C57
2024-04-21 12:53:01 s 1 -34886.527 0 +175182.70 0.358 C57
2024-04-21 13:53:01 S 15 13 27.653 +41 40 54.70 V C57
2024-04-21 13:53:01 s 1 -38071.506 0 +171206.95 0.163 C57
2024-04-21 14:13:01 S 15 13 26.203 +41 41 08.81 V C57
2024-04-21 14:13:01 s 1 -39128.643 0 +169861.06 0.203 C57
2024-04-21 14:33:01 S 15 13 24.487 +41 41 23.24 V C57
2024-04-21 14:33:01 s 1 -40183.360 0 +168504.77 0.926 C57
2024-04-21 15:13:01 S 15 13 21.670 +41 41 55.10 V C57
2024-04-21 15:13:01 s 1 -42285.234 0 +165761.09 0.193 C57
2024-04-21 15:33:01 S 15 13 20.138 +41 42 08.57 V C57
2024-04-21 15:33:01 s 1 -43332.199 0 +164373.62 0.509 C57
2024-04-21 16:13:01 S 15 13 17.186 +41 42 37.37 V C57
2024-04-21 16:13:01 s 1 -45417.759 0 +161567.51 0.103 C57
2024-04-21 16:33:01 S 15 13 15.660 +41 42 52.24 V C57
2024-04-21 16:33:01 s 1 -46456.152 0 +160148.78 0.146 C57
2024-04-21 16:53:01 S 15 13 14.129 +41 43 08.08 V C57
2024-04-21 16:53:01 s 1 -47491.498 0 +158719.62 0.234 C57
2024-04-21 17:13:01 S 15 13 13.111 +41 43 25.10 V C57
2024-04-21 17:13:01 s 1 -48523.717 0 +157280.06 0.309 C57
2024-04-21 17:33:01 S 15 13 11.146 +41 43 39.29 V C57
2024-04-21 17:33:01 s 1 -49552.677 0 +155829.99 0.187 C57
2024-04-21 17:53:01 S 15 13 10.294 +41 43 50.66 V C57
2024-04-21 17:53:01 s 1 -50578.294 0 +154369.47 0.809 C57
2024-04-21 18:13:01 S 15 13 08.618 +41 44 04.52 V C57
2024-04-21 18:13:01 s 1 -51600.486 0 +152898.55 0.113 C57
2024-04-21 18:33:01 S 15 13 06.682 +41 44 19.54 V C57
2024-04-21 18:33:01 s 1 -52619.112 0 +151417.10 0.911 C57
2024-04-21 18:53:01 S 15 13 05.839 +41 44 35.02 V C57
2024-04-21 18:53:01 s 1 -53634.087 0 +149925.20 0.142 C57
2024-04-21 19:33:01 S 15 13 02.503 +41 45 01.91 V C57
2024-04-21 19:33:01 s 1 -55652.676 0 +146910.06 0.524 C57
2024-04-21 20:13:01 S 15 12 59.606 +41 45 32.51 V C57
2024-04-21 20:13:01 s 1 -57655.364 0 +143853.11 0.364 C57