Annual Meeting of the Deep Sky Section, 2007 March 3
References
1 http://www.astrosurf.com/buil/us/iris/iris.htm
2 http://www.neatimage.com
3 Bortle, J.E., Sky & Telescope, 101, 2, 126 (2001)
4 http://www.iphas.org
5 http://garypoyner.pwp.blueyonder.co.uk/oj_camp.html
© 2007 Dominic Ford / The British Astronomical Association.