WD 1856+534 b: A Jupiter-like World in a Close Orbit

WD 1856+534 is a DA star located 80.7 light-years away, and one planet orbits it. The star's reported mass estimate is 0.605 solar masses, which is smaller than the Sun's, and its reported radius estimate is 0.0121 solar radii, also smaller than the Sun's. Its reported temperature is 4920 K, cooler than the Sun's. The star is 8.7 billion years old.

The planet, WD 1856+534 b, is classified as Jupiter-like, meaning its radius exceeds four times Earth's. It was discovered in 2020 by the transit method, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness. WD 1856+534 b has a mass of 4390 Earth masses, larger than Earth's and roughly 13.8 times Jupiter's mass. Its radius of 10.4 Earth radii is also larger than Earth's, and its orbital period is 1.41 days. Its mean density is 21.5 g/cm³, 3.9 times Earth's.