Sh2-155 The Cave Nebula in Cepheus
by Bob and Janice Fera
ASA N8 8" f/3.8 Newtonian Astrograph
Yankee Robotics Trifid-2 6303E CCD Camera
Astrodon Filters
HaRGB Composite - 150:70:70:70 minutes
Sub-exposures: Ha - 10x15 minutes; RGB - 7x10 minutes
Image acquired with CCDAutopilot
Processed in CCDstack, MaxIm/DL (with RC-Astro plug-in), PixInsight LE and Adobe Photoshop
Taken August 17, 18, 2007 from Eagle Ridge Observatory, Foresthill, CA