I take its not Jupiter? Another way to find out is to download Stellarium (free) here http://www.stellarium.org/ add your location,help here http://www.earthtools.org/ and hopefully that will help. Cheers
The following link should help. I think it is Sirus sometimes flashes like a rainbow due to our atmospherics. http://earthsky.org/brightest-stars/sirius-the-brightest-star
Small storm tonight 3 cc's in total over Dalmellington about 1745hrs still a welcome change.
Rest of set can be viewed here
Radar grab was impressive and good to see comparison with the actual cloud.
Cracking fog captures one of my fave subjects as we get a lot in the Doon Valley. Best yet this year here http://www.flickr.com/photos/daveh64/sets/72157624206901558/ We also get a lot of fog bows http://www.flickr.com/photos/daveh64/sets/72157624847844448/