Day corresponding
To know the day of the year in which the measure was made I have to
apply the following
P. I.
Cooper formula
Cooper’s formula is below
Delta = 23.45 x sen ((360 x (284 + n) / 365))
Delta is declination and n is the number corresponding
to the days of the year (Cooper table).
I get ”n” and get two values that give a very close declination to 8,183
°.
The two values are 60 and 284
The value of 60 is the 60th day of the year that is in our calendar on