Dear Greg Heill,

Thank you very much for the references.
I'l try to find the "Astronomical Algorithms by Jean Meeus". And I'll also
try to find The Orrery newsletter, Issue #41.

Kind regards,

Miem Chan

miemchanATyahoo.com


All the information you need to calculate this can be found in
Astronomical
Algorithms by Jean Meeus.

I used that reference to write a BASIC program to calculate the
altitude and elevation of the Sun at the user's location at any
given date and time for an article in The Orrery newsletter, Issue
#41.

http://members.allstream.net/~gneill/orrery.html