NGC6820 & NGC6823
Scope: Deep Sky Instruments RC10c 254mm @ f/7.4 / FL= 1880mm Corrected Ritchey Chretien
Camera: FLI- ML11002M with FLI (7 position filter wheel CFW-5-7)
Total Exposure:... Ha=(40) 30min subs for a total of 20.0 hrs.....OIII (40) 30min subs for a total of 20.0 hrs.....SII=(10) 30min subs for a total of 5.0 hrs.
July 2013: Chico, California, USA
Comments: NGC 6820 is an emission nebula that surrounds open cluster NGC 6823 in Vulpecula, near M27, the Dumbbell Nebula. The nebula NGC 6820 is also called Sharpless catalog Sh 2-86.
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. The center of the open cluster is about two million years old and is predominantly represented by many young, bright blue 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.
The open star cluster NGC 6823 is about 50 light years across and lies about 6000 light years away.