Kepler-22b (also known by its Kepler Object of Interest designation KOI-087.01) is an exoplanet orbiting within the habitable zone of the Sun-like star Kepler-22.

In the absence of an atmosphere, its equilibrium temperature (assuming an Earth-like albedo) would be approximately 279 K (6 °C; 43 °F), slightly higher than that of Earth's 255 K (−18 °C; −1 °F).

[1] The adopted model in Kipping et al. (2013) does not reliably detect the mass (the upper limit is 52.8 ME).

[11] This possibility has spurred SETI to perform research on top candidates for extraterrestrial life.

[12] In the absence of an atmosphere, its equilibrium temperature (assuming an Earth-like albedo) would be approximately 279 K (6 °C), compared with Earth's 255 K (−18 °C).

[8][clarification needed] The Hunt for Exomoons with Kepler (HEK) project has studied the Kepler photometry of the planet, to find any evidence of transit timing and duration variations that may be caused by an orbiting satellite.

[8] The planet's first transit in front of its host star was observed on Kepler's third day of scientific operations, on 12 May 2009.

Additional confirmation data was provided by the Spitzer Space Telescope and ground-based observations.