Kepler-15

thumb|alt=Comparative sizes of Sun and Kepler-15|Comparative sizes of Sun and Kepler-15 Kepler-15 (also known as KOI-128 or KIC 11359879 is a G-type subgiant with a mass of 1.018 solar masses and a radius of 1.253 solar radius.

thumb | right | alt=Comparison of best-fit size of the exoplanet Kepler-9 b with the Solar System planet Jupiter, as reported in the Open Exoplanet Catalogue, 2015 | Comparison of best-fit size of the exoplanet Kepler-9 b with the Solar System planet Jupiter, as reported in the Open Exoplanet Catalogue, 2015 Kepler-15b is a planet discovered by the Kepler spacecraft. It is a hot Jupiter, with a mass of 0.66 MJ, a radius 0.96 RJ and a period of about 4.94 days.