title: Eta1 Coronae Australis
text: # Eta1 Coronae Australis
  
  $Eta^1$ Coronae Australis, Latinized from $η^1$ CrA, is a suspected astrometric binary star system in the constellation of Corona Australis. It is visible to the naked eye as a dim, white-hued point of light with an apparent visual magnitude of 5.456. Parallax measurements put it at a distance of 317 light-years away from the Sun.
  
  The visible component is an A-type main-sequence star with a stellar classification of A3V, which indicates it is generating energy through core hydrogen fusion. It has broad spectrum absorption lines associated with its rotation period, having a projected rotational velocity of 122.3 km/s. The star is radiating 58 times the luminosity of the Sun from its photosphere at an effective temperature of 8,371 K.
  
  