Corona Australis (abbreviation: CrA), the Southern Crown, also known (less commonly but more correctly) as Corona Austrini, is a small, faint southern constellation. It lies at the southwestern edge of Sagittarius, north of Telescopium. Its principal stars (Theta, Eta-2, Gamma, Delta, Beta, Alpha, and Gamma) form an arc, similar to but fainter than that of Corona Borealis.

 

Located at the edge of the Milky Way, Corona Australis contains some interesting deep sky objects. Among these are the variable diffuse nebula NGC 6729, which surrounds the erratic variable R Coronae Australis (RA 19h 01.9m, Dec –36° 57'), and the globular cluster NGC 6541, an interesting object with binoculars or a small telescope, that lies between Theta CrA and Theta Scorpii (magnitude 6.6; diameter 13.1 arcseconds; distance 14,000 light-years; RA 18h 08m, Dec –43° 42').

 

Constellations

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