PSR B1257 12 A

PSR 1257 12 b is an exoplanet, the " PSR 1257 12 " orbiting the pulsar. Due to its low mass is assumed that it is a terrestrial planet - the size of a dwarf planet - is. He is the lightest planet detected outside the solar system (as of 15 October 2006).

Discovery

Unlike the majority of exoplanets it has been discovered using the pulsar timing method. The planet was discovered by Aleksander Wolszczan in 1992 and confirmed by other researchers.

Circulation and mass

The planet orbits its star " PSR 1257 12 " every 25.26 days, at a distance of about 0.19 astronomical units at an eccentricity of 0 percent and has a mass of about 1.329 · 1023 kg ( 0.0222481 Earth masses ). Its radius is estimated to 2200 km.

Climate and composition

It is estimated that there is on the planet a temperature of 527 ° C. It is believed that the planet from a silicate core.