Dear Fernando, many books and friends on this list report more precise algorithms, anyway this simple formula is nice and useful for a quick and approximate calculus :
DECL = 23.44 x sin ( 360 x N / 365) where N is the number of days from March 21. Best regards Alberto Nicelli Italy ( 45* 28' N ; 7* 52' E) > ---------- > From: Fernando Cabral[SMTP:[EMAIL PROTECTED] > Sent: martedì 29 settembre 1998 19.05 > To: [email protected] > Subject: Declination by calculation? > .............................................................. > Is there a formula to calculate the sun declination based on the date > and perhaps > the local time? The idea here, of course, is getting rid of any tables. > > Thank you > > > - fernando > > > > > > -- > mailto:[EMAIL PROTECTED] http://www.pix.com.br > Fernando Cabral Padrao iX Sistemas Abertos > [EMAIL PROTECTED] [EMAIL PROTECTED] > Fone: +55 61 321-2433 Fax: +55 61 225-3082 > Birthplace: 19º 37' 57.0" S 45º 17' 13.6" W > Home: 15º 45' 04.9" S 47º 49' 58.6" W > >
