NGC 6819 explained

NGC 6819
Credit:	Tom Wildener
Epoch:	J2000
Constellation:	Cygnus
Ra:	^[1]
Dist Ly:	7,200 ly
Appmag V:	7.3
Size V:	5'
Names:	Collinder 403

NGC 6819 is an open cluster (commonly known as an "open star cluster") located 7,200 light years away in the Cygnus constellation. It was discovered by Caroline Herschel on 12 May 1784.

Situated on the boundary of Cygnus and Lyra, NGC 6819 contains roughly two dozen stars of magnitude 10 to 12, with many more lower magnitude members.^[2]

The age of NGC 6819 is estimated here to be ~ 2.5 ± 0.5 Gyr.^[3] Its distance is calculated to be 2.16 ± 0.57 kpc.^[4]

External links

• • NGC 6819 at SEDS
• NGC 6819 at Silicon Owl
• NGC 6819 at Messier45

Notes and References

1. NGC 6819. 2021-02-19.
2. Web site: NGC 6819. November 16, 2011.
3. Web site: Astro Lab Spring 2008. www.phy.ohiou.edu. 2016-06-02. https://web.archive.org/web/20181001162932/http://www.phy.ohiou.edu/~tss/ASTR410/Ragozzine_Uckert08/ragozzine.html. 2018-10-01. dead.
4. Web site: Astro Lab Spring 2008. www.phy.ohiou.edu. 2016-06-02. https://web.archive.org/web/20181001162932/http://www.phy.ohiou.edu/~tss/ASTR410/Ragozzine_Uckert08/ragozzine.html. 2018-10-01. dead.