region of Gemini. A composition of ten minute sub frames making a total exposure time of
one hour for each filter was used. The filters were a Lumicon Night Sky H-alpha and an
Astronomik O111 filter:
This part of the night sky, the central region of Cassiopeia is challenging. It is full of
H Alpha and O111 regions of nebulosity. This image of IC59 and IC63 was taken using a two
hour exposure using a H-alpha filter for image luminance . The colour information was
combined with the luminance information with exposure times of 15 minutes for each RGB
filter:
