Astronomy:NGC 6819
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Short description: Open cluster in the constellation Cygnus
| NGC 6819 | |
|---|---|
 Credit: Tom Wildener | |
| Observation data (J2000 epoch) | |
| Constellation | Cygnus |
| Right ascension | 19h 41m 18.0s[1] |
| Declination | +40° 11′ 12″[1] |
| Distance | 7,200 ly |
| Apparent magnitude (V) | 7.3[1] |
| Apparent dimensions (V) | 5' |
| Physical characteristics | |
| Other designations | 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]
References
- ↑ 1.0 1.1 1.2 "NGC 6819". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6819.
- ↑ "NGC 6819". http://observing.skyhound.com/archives/aug1/NGC_6819.html.
- ↑ "Astro Lab Spring 2008". http://www.phy.ohiou.edu/~tss/ASTR410/Ragozzine_Uckert08/ragozzine.html.
- ↑ "Astro Lab Spring 2008". http://www.phy.ohiou.edu/~tss/ASTR410/Ragozzine_Uckert08/ragozzine.html.
External links
- NGC 6819 at SEDS
- NGC 6819 at Silicon Owl
- NGC 6819 at Messier45[yes|permanent dead link|dead link}}]
- NGC 6819 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
19h 41m 18s, +40° 11′ 00″
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