I should have mentioned in my previous email message that XEphem describes itself as "An Interactive Astronomical Ephemeris Program for X Windows, Version 3.2.3 25 Oct 1999." It is available for free from the web, or can be ordered on CD (with manual and binaries for several UNIX platforms). Checkout http://www.ClearSkyInstitute.com/xephem for more information.
Jim 40N45, 111W53 =-= Curiosity killed the cat, but for a while I was the suspect. -- Steven Wright