XEPHEM

What is Xephem?

• Xephem is an interactive astronomy program for X Windows systems with Motif written by E.C. Downey. The program allows you to view the positions of celestial objects on the sky graphically as a function of time (ephem is short for ephemeris). Xephem version 3.7.5 is currently installed on Astronomy Department machines.

How Do I Run Xephem?

• To run xephem, login to an astronomy maching and open up a windowing system. Then type which xephem at the prompt in one of the windows to see if the command is available. If it is, type xephem to run. Or download xephem onto your home machine from the Xephem Home Page.

Where Can I Learn More?

• Type man xephem at the Unix prompt for system information.
• Use the Help Buttons accessible from each xephem window.
• Xephem Home Page.