Values in this table come from the NASA Exoplanet Archive. Wherever possible, values are taken from published papers as listed in the confirmed planets table in the Exoplanet Archive. Otherwise, values are taken from the Cumulative KOI Activity Table. Thus, values for a given KOI may come from different sources and the Exoplanet Archive can be consulted to provide the original data source.
* Planet temperatures are given from either a published paper or the Kepler Cumulative Activity Table. They are generally computed based on an assumption that the planet is in equilibrium with radiation from its star balanced by its own black body radiation, taking into account some reflection of radiation from the planet (albedo). Actual albedo is unknown, so calculations assume a "generic" albedo (e.g., the Cumulative Activity Table uses a value of 0.3). Temperatures do not take into account atmospheric properties (greenhouse effect), since these are unknown. The original data source should be consulted for specific calculations.
Jupiter, for example, not only has an atmosphere to complicate things, but a significant internal heat source as well. If Earth did not have atmosphere, its temperature would be below freezing point of water. The first Earth temperature value given in the table is computed as an average temperature if there were no greenhouse gases. The second value is Earth's actual average temperature.
** The inclination is the tilt of the orbital plane of the planet with respect to the plane of the sky, so 90 degrees is viewing the planet's orbit edge-on. All transiting planets with long-period orbits have this inclination very close to 90 degrees, and even close-in transiting planets have inclinations above ~80 degrees.
*** Metallicity values from published papers are given as reported and may be either [Fe/H] or [M/H]. Values from the Cumulative Activity Table are always [Fe/H], see the Exoplanet Archive for details.