The PDS 70 Exoplanetary System
PDS 70 is a star with null times the mass of the Sun, and null times its radius. It is located 369.83 light years away from the solar system and is estimated to be 0.005 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
PDS 70 is known to have 2 exoplanets in orbit around it.
PDS 70 c
PDS 70 c was discovered by the European Southern Observatory observatory using the imaging method. Its semi-major axis is 34.00 astronomical units, as compared to Earth's which is 1 astronomical unit.
Its eccentricity, the extent to which the shape of the exoplanet's orbit departs from a perfect circle (Earth's is 0.0167, which is why the shape of Earth's orbit is circular rather than oval in appearance), is 0.11, which means that when PDS 70 c is at is at its closest point to its host star, 30.26 astronomical units separates the two, and when it is at its farthest point, this number is 37.74. In the case of Earth, these numbers are 0.9832899 and 1.0167103 respectively.
The mass of PDS 70 c is 635.62 times the mass of Earth. The radius of PDS 70 c is 22.866 that of Earth. At more than 50 Earth masses, PDS 70 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn in our solar system.