Nightscapes & Deep Sky Colors
Astrophotography © Brian A. Morganti
NGC 6820 Emission Nebula
NGC 6823 Open Cluster
Mouse over the above image to see the designations of the various objects
NGC 6820 is an emission nebula that surrounds open cluster NGC 6823 in Vulpecula. The nebula NGC 6820 is also called Sharpless catalog Sh 2-86, which may more accurately be assigned to the small reflection nebula also known as GN 19.40.3
The most striking feature is the trunk-like pillar of dust and gas protruding from the east side of the nebula towards the open cluster, NGC 6823 in the west. The center of the open cluster is about two million years old and is predominantly represented by many young, bright blue-white stars. Outer parts of the cluster intimately involving pillars of emission nebula NGC 6820, contain even younger stars. The huge pillars of gas and dust are probably formed when surrounding gas and dust is pushed and eroded away by radiation from nearby stars. Remarkable dark globules of gas and dust are also visible in the nebula, much as is seen in the better known Eagle Nebula in Serpens or the Lagoon Nebula in Sagittarius.
Open star cluster NGC 6823 is about 50 light years across and lies about 6000 light years away.