Monday, 25 March 2013

AR11704 CaK Closeup - 25th March

Cak closeup colour by Mark Townley
Cak closeup colour, a photo by Mark Townley on Flickr.

New active region AR11704 is the only real feature of interest in CaK on our star today. This was taken with the 70mm scope @ f9, DMK31 and homebrew CaK filter.