The HN Peg Exoplanetary System
HN Peg is a star with 1.1 times the mass of the Sun, and 1.04 times its radius. It is located 59.13 light years away from the solar system and is estimated to be 3.1 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
HN Peg is known to have 1 exoplanets in orbit around it.
HN Peg b
HN Peg b was discovered by the Spitzer Space Telescope observatory using the imaging method. Its discovery was announced in 2007-01. Its semi-major axis is 773.00 astronomical units, as compared to Earth's which is 1 astronomical unit.
The mass of HN Peg b is 6991.42 times the mass of Earth. The radius of HN Peg b is 11.777 that of Earth. At more than 50 Earth masses, HN Peg b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn in our solar system.