Thanks Patrick! That explains it and it makes perfect sense. End of story and end of thread.
BTW, Sky Charts is probably the most used program on my PC together with the Orbitron satellite tracking program. Keep up the good work, Patrick. Merci beaucoup!! Jan --- In [email protected], Patrick Chevalley <[EMAIL PROTECTED]> wrote: > > Hi, > > This is because the calendar use a shortcut to speed the calculation > when you request a long range of date. Remember I developed most of the > V2 with a 166Mhz Pentium :-) > > For rapidly moving object such the Moon, Sun, planets, some asteroid and > comet we need an iterative or interpolative computation to find the real > rise/set time. > This is done in the info box for one object but not in the calendar, or > only for the Moon. > > The Sun and Moon rise/set always refer to the upper limb and take > account for the refraction. > > In real world there is always a much bigger difference because of > variation in the refraction, obstacle at the horizon, ... > > Patrick > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/skychart-discussion/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
