The yCas Nebula is a combination of two nebulae, IC 59 (top, center) and IC 63 (lower, left.) The star yCas shines at a magnitude 2.15 and is the central star in the "W" shape of the constellation Cassiopeia.
ABOUT THE IMAGE
DATE/TIME: Taken on the evening of September 11th, 2013.
CAMERA: Canon XSI, 450Da
TELESCOPE: Celestron C9.25" SCT @ F/6.3
ISO SETTING: 800
EXPOSURE LENGTH: 600sec.
TOTAL EXPOSURE LENGTH: 4hrs, 10min.
SUBTRACTIONS: 16 dark frames, 40 flat frames and 16 dark-flat frames.
STACKING/PRE-PROCESSING: Deep Sky Stacker
PROCESSING: Photoshop CS3