Fluorescent Crescent


David Slack

Prudhoe, Northumberland

Orion ED80, SXV-H9 mono CCD camera, 0.6 focal reducer, Skywatcher HEQ5 Pro, Astronomik 12nm Oiii filter, Baader 7nm Ha filter and a finder guider using ZWO ASI120mm.

Bi-colour image of NGC6888 comprising 40 x 5 minute exposures with 12nm Oiii filter added to 25 x 3 minute exposures Ha taken in July 2016. I am glad I took the time to collect some Oiii data as it has given the crescent a glow that allows it to stand out against the surrounding gas.