Gamma (eclipse)
Measure of the alignment of an eclipse / From Wikipedia, the free encyclopedia
Gamma (denoted as γ) of an eclipse describes how centrally the shadow of the Moon or Earth strikes the other body. This distance, measured at the moment when the axis of the shadow cone passes closest to the center of the Earth or Moon, is stated as a fraction of the equatorial radius of the earth (6378.137 km).[1]