Stars with Exoplanets: Errai (original) (raw)

Errai A, or Gamma Cephei A, is an orange subgiant, orbited by a red dwarf (B). The A star has a gas planet with 1.59 times the mass of Jupiter, which orbits its star every 2.47 years in an average distance of 2.03 AU.

Constellation: Cepheus
Age: 3 billion years
Distance: 45 light-years
Space between Errai A and B: 12 - 26 AU
Orbit period of Errai A and B: 74 years

| Errai A Spectral class: K2 Visual magnitude: 3.22 Luminosity: 10.6 * Sun Mass: 1.6 * Sun Diameter: 4.5 * Sun | | Errai B Spectral class: M Mass: 0.4 * Sun Diameter: 0.5 * Sun | | ----------------------------------------------------------------------------------------------------------------------------------- | | --------------------------------------------------------------------------- |

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08/26/2006

Errai A (hidden) and B.
Photo: Fukagawa / idw / University of Jena