Anyway Orestis, you might be able to find a better one than WX Sgr. The eclipses can be quite stunning - here's an animation I did a year ago of WX Sgr 'normally', in eclipse, and back to 'normal'. Look for a star left of centre.
http://i727.photobucket.com/albums/w...2-13June10.gif
Good luck!
Cheers -