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KOI 4878 Star System

KOI-4878 is a F-type main-sequence star, located at a distance of 1075 light years from the Solar System.
KOI-4878.01 is an unconfirmed extrasolar planet. KOI-4878.01 has an Earth Similarity Index of 98%, which is the highest that has been found. The estimated characteristics of the planet are similar to an Earth analog, although it is unconfirmed. It completes an orbit around its host star every 449 Earth days. Its host star is an F-type main-sequence star that is slightly less massive than the Sun, although it is about 5% larger and has a temperature of about 6031 K. Based on this, KOI-4878.01 should be in the habitable zone of the star. Its mass is somewhere between 0.4 - 3.0 Earth masses, likely about 0.99 Earth masses, and it it has a slightly larger radius (1.04), and has an equilibrium temperature of 256 K (-16.5 °C; 2.3 °F), extremely similar to Earth's equilibrium temperature of 255 K (-18 °C; -1 °F), If the atmosphere is similar to Earth's, it will have an average surface temperature of 291 K (17.85°C; 64.13 °F), slightly higher than Earth's.