Epoch J2000.0 Equinox J2000.0
|Right ascension||20h 17m 38.9s|
|Declination||−12° 30′ 30″|
|Apparent magnitude (V)||+4.30/+8.5|
|Distance||690 ± 140 ly
(211 ± 43 pc)
|Spectral type||G3 Ib|
Alpha1 Capricorni (α1 Cap, α1 Capricorni) is a double star in the southern constellation of Capricornus. It also has the traditional star name Prima Giedi or Algiedi Prima, and shares the name Algedi (from الجدي - al-jadii, meaning the goat) with α² Capricorni. It is approximately 690 light years from Earth.
This is a yellow G-type supergiant with an apparent magnitude of +4.30. This star has 5.3 times the mass of the Sun and is radiating around 1,047 times the Sun's luminosity. It has an 8th magnitude companion, separated by 0.65 arcseconds from the primary.
In popular culture
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