This is a dimmer part of the Veil Nebula in Cygnus. Being discovered in 1904 after the New General Catalogue was created, it has no NGC number.
Like the brighter Western and Eastern Veil Nebulae, it is part of the larger supernova remnant, that exploded between 10,000 and 20,000 years ago. The source was a star 20 times more massive than the Sun and the nebula is 2400 lightyears distant.
In this RGBHOO image, hydrogen has been mapped to red, and oxygen to both green and blue. It is the result of 1h of RGB and 5 hours of Ha and OIII data capture from Horsham, over 4 evenings in August and September 2024. A ZWO ASI2600MM Pro camera was used, through an 8-inch Teleskop-Service Ritchey-Chretien reflector.
Date: 04/09/2025
Location: Horsham, West Sussex
Photographer: Graham Wilcock
