Proxima Cen is a star with 0.12 times the mass of the Sun, and 0.14 times its radius. It is located 4.24 light years away from the solar system.
Proxima Cen is known to have 1 exoplanets in orbit around it.
Proxima Cen b was discovered by the European Southern Observatory observatory, in 2016-08, using the radial velocity method. Its semi-major axis is 0.05 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of Proxima Cen b is 1.272 times the mass of Earth. The radius of Proxima Cen b is 1.080 that of Earth. At less than 1.5 Earth masses, Proxima Cen b is a regular terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars. Proxima Cen b orbits within the habitable zone of its parent star and could, potentially, be a habitable planet with stable bodies of liquid water on its surface, like Earth.