V391 Pegasi b

V391 Pegasi b is an exoplanet of the subdwarf V391 Pegasi encircles all 1140 days. Due to its high mass is assumed that it is a gas planet.

Discovery

The planet was from R. Silvotti et al. discovered in 2007. The short-period pulsations of the sub- dwarf made ​​it to Use: Since these are very precise and predictable, periodic changes in the Pulsationsdauer by the influence of a massive companion noticeable.

Circulation and mass

The planet orbits its star at a distance of about 1.7 astronomical units and has a minimum mass of about 1017 Earth masses, or 3.2 Jupiter masses.