Nebulae
NGC 6888 Crescent Nebula in Cygnus (HSO palette)
This emission nebula is composed of material ejected from a red giant star, showing as shock waves. It is around 5000 lightyears distant.
This narrowband image is the result of 4h of data capture, over two evenings in August and September 2021. It consists of 2h of capture through a H-alpha filter and 2h of capture using an Oxygen-III filter. ZWO ASI2600MM Pro camera though an 8-inch Teleskop-Service Ritchey-Chretien reflector.
In this rendition using an HSO colour palette, Ha is mapped to red-gold and OIII to blue. This shows the OIII nebulosity structure well.
Date: 05/09/2021
Location: Horsham, West Sussex
Photographer: Graham Wilcock
