<P> Where the obliquity of the ecliptic is not obtained elsewhere, it can be approximated: </P> <Dl> <Dd> ε = 23.439 ∘ − 0.0000004 ∘ n (\ displaystyle \ epsilon = 23.439 ^ (\ circ) - 0.0000004 ^ (\ circ) n) </Dd> </Dl> <Dd> ε = 23.439 ∘ − 0.0000004 ∘ n (\ displaystyle \ epsilon = 23.439 ^ (\ circ) - 0.0000004 ^ (\ circ) n) </Dd> <P> for use with the above equations . </P>

Four coordinates of earth on its revolution around the sun