Perihelion-Minimum distance from the Sun to a planet in Kepler's First Law
Formula
rmin
perihelion, minimum distance from the Sun to the planet
epsilon
the eccentricity of the ellipse
Formula description
In astronomy, Kepler's laws give a description of the motion of planets around the Sun. Kepler's First Law is "The orbit of every planet is an ellipse with the Sun at one of the two foci."