Achernar

Achernar (Alpha Eridani) is the ninth-brightest star in the sky, a bright blue variable B-type star in the southern sky. It is a Be star, with a rotation period of roughly two days at most, which considerably flattens it. It has an A-type binary companion orbiting at about 7 AU. Characteristics:

• Eridanus - constellation.
• 01h37m42.84548s - right ascension.
• -57deg14m12.3101 - declination.
• +0.46 - apparent magnitude.
• -2.74 - absolute magnitude.
• 139 ly - distance.
• -0.16 - B-V color index.

Achernar A characteristics:

• B3 Vpe - spectral type.
• 6 - mass(solar).
• 3493 - luminosity(solar).
• ~8 - radius(solar).