Kepler-47d

Kepler-47d completes one orbit in about 187.4 Earth days and sits about 0.6992 astronomical units from its host system. NASA lists its discovery year as 2019. [NASA Exoplanet Catalog](https://science.nasa.gov/exoplanet-catalog/kepler-47-d/)

Astronomers detected it with NASA's Kepler space telescope using the transit method, watching the planet pass in front of its stars. NASA announced the third planet in the Kepler-47 system in April 2019. [NASA discovery alert](https://www.nasa.gov/missions/kepler/discovery-alert-a-third-planet-in-kepler-47-system/)

It is a Neptune-like world with a radius of about 7 Earth radii, making it the largest of the 3 known planets in the system at discovery. NASA lists its mass as about 19.02 Earth masses. [NASA Exoplanet Catalog](https://science.nasa.gov/exoplanet-catalog/kepler-47-d/)

It is a circumbinary planet, meaning it travels around both stars in the Kepler-47 binary system. The 2 stars orbit each other every 7.45 days, while Kepler-47d takes about 187 days to go around the pair. [NASA discovery alert](https://www.nasa.gov/missions/kepler/discovery-alert-a-third-planet-in-kepler-47-system/)