×

PSR B1257+12 B

Astronomical discovery
PSR B1257+12 c, alternatively designated PSR B1257+12 B, also named Poltergeist, is an extrasolar planet approximately 2,300 light-years away in the constellation of Virgo. It was one of the first planets ever discovered outside the Solar System,... Wikipedia
Discovered: January 22, 1992
Orbits: PSR B1257+12
Detection method: Pulsar Timing
Mass: 4.3 ± 0.2 ME
Orbital period (sidereal): 66.5419 ± 0.0001 d
Semi-major axis: 0.36 AU (54,000,000 km)