I'm coding a solar system animation and so far it's done, but the the orbits of the planets are circular. To make the simulation more realistic, I want to use elliptic orbits. So I visited Mercury (planet) and Solar System Exploration: Planets: Mercury: Facts & Figures pages, but the semi-minor axis of the Mercury (or any other planet) isn't given.
Then I looked for a way to calculate it and found a formula
in Ellipse - Wikipedia, the free encyclopedia page, but my math knowledge falls short in applying it to my situation.
Mercury Semi-major axis 57,909,050 km Eccentricity 0.205630 Aphelion 69,816,900 km Perihelion 46,001,200 km
Is there a way to calculate the semi-minor axis of Mercury's orbit with the given values?