PhotographerKjell H. Winnem
Location of photoHof,Norway
Date/Time of photo4-10 dec 2012
EquipmentHomebuilt 10-inch Newtonian f/4 and mount in dome.Cam.:SXVR-H9 guided off-axis with DSI ProII and PHD,GPUSB-interface to mount.Exp.:Ha 5x30m,SII 4x30m bin2x2,OIII 3x30m bin2x2.HST-palette.Proc.:Nebulosity2 and PS CS3.
DescriptionNGC7635,also called the Bubble Nebula is a emission nebula in Cassiopeia,created by the stellar wind from a massiv hot young Wolf-Rayet star(10-40 solar masses).The main bubble is contained within another bubble about 2,5 times the diameter of the smaller and all is embedded in a giant molecular cloud.Distance abt.7800 ly.