2.23
Apparent Mag75
Distance (ly)A0V
Spectral Type9,700
Temperature (K)Alpha Coronae Borealis, also known as Alphecca or Gemma, is the brightest star in Corona Borealis and an eclipsing binary.
Stellar Data
Apparent Magnitude2.23
Absolute Magnitude0.42
Distance75 light-years
Spectral TypeA0V
Temperature9,700 K
Luminosity67 L☉
Radius2.89 R☉
Mass2.58 M☉
Right Ascension15h 34m 41.3s
Declination+26° 42′ 52.9″
ConstellationCorona Borealis
Notable Facts
- Also known as Alphecca or Gemma
- It is an eclipsing binary with a period of 17.36 days
- The name Gemma means jewel, as it is the gem of the crown