<P> The mean anomaly of the Sun (actually, of the Earth in its orbit around the Sun, but it is convenient to pretend the Sun orbits the Earth), is: </P> <Dl> <Dd> g = 357.528 ∘ + 0.9856003 ∘ n (\ displaystyle g = 357.528 ^ (\ circ) + 0.9856003 ^ (\ circ) n) </Dd> </Dl> <Dd> g = 357.528 ∘ + 0.9856003 ∘ n (\ displaystyle g = 357.528 ^ (\ circ) + 0.9856003 ^ (\ circ) n) </Dd> <P> Put L (\ displaystyle L) and g (\ displaystyle g) in the range 0 ° to 360 ° by adding or subtracting multiples of 360 ° as needed . </P>

A plot of sunrise position as a function of time of the year