Kepler-751: A Cooler, Smaller Sun with a Super-Earth

Kepler-751 is a star located 2480 light-years away, and it hosts one known planet. The star is estimated to be 4.47 billion years old, with a mass of 0.87 solar masses and a radius of 0.84 solar radii. Its reported temperature is 5390 K. The star's reported mass estimate is smaller than the Sun's, and its reported radius estimate is also smaller than the Sun's. Its reported temperature is cooler than the Sun's.

The planet Kepler-751 b was discovered in 2016 by the transit method. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness. Repeated dips help establish orbital periods. Kepler-751 b is classified as a Super-Earth, a size class that reaches 2.5 times Earth's radius. Its radius is 2.46 Earth radii, and this reported radius estimate is larger than Earth's. The planet completes one orbit, its year, in 17.4 days.