Kepler-803 b: A Neptune-like World in a Distant System

Kepler-803 is a star located 2090 light-years away, with one known planet in orbit around it. The host star is estimated to be 4.9 billion years old, with a mass of 1.05 solar masses and a radius of 1.12 solar radii. Its temperature is 5920 K. The star's reported mass estimate is larger than the Sun's, its reported radius estimate is larger than the Sun's, and its reported temperature is hotter than the Sun's.

The system's only known planet is Kepler-803 b, a Neptune-like world discovered by the transit method in 2016. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness, and repeated dips help establish orbital periods. Kepler-803 b completes an orbit every 50.3 days and has a radius of 3.79 Earth radii. That reported radius estimate is larger than Earth's. In planet size classes, a Neptune-like planet reaches 4 times Earth's radius, so Kepler-803 b's radius places it within that category.