Saturday, September 01, 2007
Sh2-104 Emission Nebula in Cygnus
©2007 Richard Murray
Full Size Image
Techno Stuff: 8/18/07 Camera: ATK-16hr, Imaging Scope: Megrez 80mm APO at F/6, mounted on LX90 8" SCT, Ha 6nm, 76 minutes total with two 30 min subs and one 16 min sub (interupted due to clouds), binning 1x1, Autoguided with DSI Pro and PHDGuide from LX90, No Darks, Processed with CCDStack, Photoshop CS2 and PixInsight
Notes: Seldom imaged by amateur astronomers, this is a very faint emission nebula in the constellation Cygnus. This is located due east of the popular Crescent Nebula. Sh-104 is viewed by professional astronomers as a good illustration of the "collect and collapse" model of star formation triggered by the rapid expansion of a Helium II region.