Magnificient images of the Pinwheel galaxy M101 in Ursa Major, obtained by Brad Wallis and Robert Provin [click on the images to see them in their full size and glory].

The left image was exposed 20 minutes with SBIG ST-7 CCD camera on an Astro-Physics 4 inch f/6 Traveler APO refractor.
The right picture was composed of two co-added 30 minute exposures with SBIG ST-7 CCD camera with minus-IR filter, on an Astro-Physics 152mm f/7.5 EDF refractor. Dark frame: average of nine. Flat frame: average of 4.

The images in this page are copyrighted © by Brad Wallis and Robert Provin who kindly contributed them to our database. They may be freely used for private purpose [only]. Use in non-commercial public html pages requires appropriate acknowledgement. If you should consider any for-profit use, please contact Robert Provin.

Last Modification: 28 Jun 1998, 18:30 MET