Kepler-421 (KOI-1274 A) is a yellow main sequence star, being of spectral class G7V. Orange star of spectral class K9V (KOI-1274 B), projected on sky plane just 1.085″ away, is not physically associated to it. The distance to star KOI-1274 A is approximately 1150 light-years, and to KOI-1274 B is about 1900 light-years.

Planetary system

Kepler-421 has an exoplanet (Kepler-421b), which is notable for its position near the snow line.

The Kepler-421 planetary system
Companion (in order from star)MassSemimajor axis (AU)Orbital period (days)EccentricityInclinationRadius
b1.219+0.089 −0.106704.20±0.010.041+0.095 −0.03489.965+0.024 −0.031°0.411+0.021 −0.016 RJ