2021 UL9

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6961634103 ± 2.59e-06
Semi-major axis (a)2.7344685101 AU ± 2.15e-05
Inclination (i)12.77396680° ± 6.73e-05
Long. of Asc. Node (Ω)357.01583474° ± 3.48e-05
Arg. of Perihelion (ω)103.66324626° ± 4.04e-05
Mean Anomaly (M)308.24751405° ± 3.64e-03
Mean Motion (n)0.2179730929°/day ± 2.58e-06
Perihelion dist (q)0.83083159 AU ± 9.65e-06
Aphelion dist (Q)4.63810543 AU ± 3.72e-05
Orbital Period4.52177959 yr ± 5.34e-05
Physical Parameters
H (abs. magnitude)21.70
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.265″
Uncertainty1
Orbit TypeApollo
MOID0.080117 AU
Observations Used50
Oppositions1
Arc Total2021-2022
First Observation Used2021-10-31
Last Observation Used2022-03-12
Observations (52)
Date Type RA Dec Mag Band Observatory
2022-03-12 12:59:08 C 13 54 18.605 -15 53 30.30 U F52
2022-03-12 13:16:35 C 13 54 15.791 -15 53 41.70 U F52