Graem Lourens © 2017
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NGC7635 Bubble Nebula

The bubble nebula is an emission nebula in the constellation of Cassiopeia. The bubble is caused by a young central star that excites the giant molecular cloud surrounding it.

Distance to earth: 8’000 lightyears
Apparent size: 30 arcminutes (1 x the moon)

Imaging time: 13.8 hours

Telescope: SW Evostar 80ED
Camera: Atik 460EX Mono

Capture information:
Date: September – November 2015
Total exposure time: 13.8 hours
Color combination: HA=Red, OIII=Green/Blue

Image data:
20 x 1200s HA
20 x 1200s OIII