51 Pegasi b

Exoplanet

The first exoplanet discovered orbiting a Sun-like star, a 'hot Jupiter' whose discovery launched modern exoplanet science.

Facts

TypeExoplanet
Orbits51 Pegasi
Distance from Earth50.9 ly
Diameter179,662 km
Mass1.16 × 10^27 kg
Temperature1,011°C
Orbital period4 days
Apparent magnitude5.49
HemisphereNorthern
Discovered1995
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