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51 Pegasi and Bellerophon

51 Pegasi was the first star (except the Sun of course) where a planet has been detected (1995, the first exoplanet). This received the name Bellerophon. It is very close to its star and therefore extremely hot. At least one other additional planet exists.

Constellation: Pegasus
Distance: 50.1 light-years
Radial velocity: -33.7 km/sec
Planet orbit time: 4.2293 days

51 Pegasi

Spectral class: G2-3
Visual magnitude: 5.47
Luminosity: 1.33 * Sun
Mass: 1.1 * Sun
Diameter: 1.27 * Sun
 

Planet Bellerophon




Mass: 0.5 * Jupiter
Diameter: 1.3 * Jupiter

Back: List of Exoplanets
    51 Pegasi
In the picture Bellerophon is in the foreground, otherwise it would be much to big.
Graphic: Nasa

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