Maybe for planetary but not for guiding. Personaly i wouldn't bother and look for a quickcam 4000 pro ect on ebay if moneys tight. I can't find the full specs of it but a few googles says its not so crash hot
http://homepage.ntlworld.com/molyned/web-cameras.htm
This site has a list of alot of cams and there specs and if there useable for astro work.