NGC 6520 is an open cluster in the constellation Sagittarius, superimposed upon the Large Sagittarius Star Cloud. It is magnitude 9.0, diameter 5 arc minutes and class G. It has about 25 stars of magnitude 9 to 12. The dark nebula Barnard 86 lies near its western edge.

NGC 6520
Star cluster NGC 6520 and dark nebula Barnard 86 within the Large Sagittarius Star Cloud Credit: Johannes Schedler
Observation data (J2000 epoch)
Constellation	Sagittarius
Right ascension	18h 3.4m [1]
Declination	−27° 53′[1]
Apparent magnitude (V)	9.0
Apparent dimensions (V)	5'
Physical characteristics
Other designations	Cr 361, Mel 187
See also: Open cluster, List of open clusters

References

• Robert Burnham Jr, Burnham's Celestial Handbook: An observer's guide to the universe beyond the solar system, vol 3, p. 1555

External links

• Media related to NGC 6520 at Wikimedia Commons
• NGC 6520 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

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