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Alpha Arae

Proper NameNone
Bayer DesignationsAlpha Arae
Flamsteed NumberNone
HR (BSC)6510
Right Ascension17h 31m 50s
Declination-49° 52' 34"
Distance267 light years
82 parsecs
MagnitudeApparent: +2.8
Absolute: -1.7
Spectral ClassB2Vne Blue Dwarf
Optimum VisibilityJune / July (Usually visible from southern latitudes)

Alpha Arae has roughly the same mass as the Earth's Sun, but is much brighter and hotter, with a surface temperature of at least 10,000 Kelvin. It is highly variable: its brightness in the sky can vary by almost a tenth of a magnitude, perhaps because of variations in brightness on the surface of the star itself.

The brightest of the stars in Ara, the Altar, it lies in the central regions of the band of the Milky Way, about 270 light years (about 80 parsecs) inward across the Galactic disc.


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