The open cluster NGC 6823 near the centre of this image, is embedded in the extensive hydrogen emission of the Sh2-86 nebula. The cluster is around 50 lightyears across and 6000 lightyears distant.
The most striking feature is the trunk-like pillar of dust and gas protruding from the east side of the nebula, pointing towards the open cluster. A number of smaller structures can be seen throughout most of the nebula. These huge pillars of gas and dust are probably formed when surrounding gas and dust is eroded away by radiation from the cluster stars.
The center of the open cluster is about two million years old and is predominantly represented by many young, bright blue stars.
This HaRGB image is the result of 2h of RGB and 6h of Ha data capture from Horsham over six evenings in July 2024. A ZWO ASI2600MM Pro camera was used, through an 8-inch Teleskop-Service Ritchey-Chretien reflector.
Date: 28/07/2024
Location: Horsham, West Sussex
Photographer: Graham Wilcock
