NGC 4631“The Whale” galaxy, NGC 4627 and NGC 4656
Imaged 2009 April 26th at the
Kelling Heath Star Party, Norfolk, UK
Televue TVNP101 100mm APO refractor 540mm fl.
Sbig ST4 autoguider on G11 Mount
Starlight Xpress HX916 CCD camera
True Tech RGB colour filters
LRGB image L 60 mins 1x1, R 25 mins 1x1 G 25 mins 1x1, B 25 mins 1x1.
Two hour Fifteen minute total exposure.
Luminance sub exposures 300 seconds.