I found this nifty little thing last night. It runs on the desktop. I loaded it and have been running it for 24 hours. No problems / virus.
 
And, it's free.
 
Barney B.
 
 
Download a Sidereal Clock for Your Desktop
... The right ascension of a celestial object is same as the local mean sidereal time
that the object will pass an imaginary line drawn from the celestial pole to ...
www.radiosky.com/sidclockdownload.html - 4k - Cached - Similar pages