apse line मीनिंग इन हिंदी

For circular orbits apse line is not defined, because eccentricity is equal to zero.
Let 2a be the distance measured along the apse line from periapsis P to apoapsis A, as illustrated in the equation below:
There are three parameters that affect the size and shape of the analemma eccentricity, and the angle between the apse line and the line of solstices.