PSR B1620-26 b
Description: PSR B1620-26 b is an exoplanet located approximately 12,400 light-years from Earth in the constellation of Scorpius. It bears the unofficial nicknames "Methuselah" and "the Genesis planet" due to its extreme age. The planet is in a circumbinary orbit around the two stars of PSR B1620-26 and is the first circumbinary planet ever confirmed. It is also the first planet found in a globular cluster. The planet is one of the oldest known extrasolar planets, believed to be about 12.7 billion years old.
Physical Properties
Mass (Jupiter mass): 2.5 MJ
Radius (Jupiter radius): 1.18 RJ
Density: 1.86 g/cm³
Equilibrium Temperature: Unknown
Orbital Parameters
Orbital Period: Unknown
Semi-major Axis: 23.0 AU
Eccentricity: Unknown
Inclination: Unknown
Host Star Properties
Host Star: PSR B1620-26
Spectral Type: Unknown
Temperature: Unknown
Stellar Mass: 1.35 M☉
Stellar Radius: Unknown
Discovery Information
Planet Letter: b
Object ID: 3.11423
Host ID: 2.103404
Discovery Date: 2003-07
Discovery Year: 2003
Discovery Method: Pulsar Timing
Discovery Locale: Space
Discovery Facility: Hubble Space Telescope
Discovery Instrument: WFPC2 Camera