Kepler-440b

Kepler-440b (also known by its Kepler Object of Interest designation KOI-4087.01) is a confirmed super-Earth exoplanet orbiting within the habitable zone of Kepler-440, about 850 light-years (261 pc) from Earth.^[1] The planet was discovered by NASA's Kepler spacecraft using the transit method, in which the dimming effect that a planet causes as it crosses in front of its star is measured. NASA announced the confirmation of the exoplanet on 6 January 2015.^[4]

Kepler-440b^[1]

Discovery
Discovery site	Kepler Space Observatory
Discovery date	2015[2]
Detection method	Transit
Orbital characteristics
Semi-major axis	0.24200 AU (36,203,000 km)
Eccentricity	>0.340
Orbital period (sidereal)	101.11141000 d
Inclination	89.930
Star	Kepler-440
Physical characteristics
Mean radius	1.860 R🜨
Temperature	273 K (0 °C; 32 °F).[3]

Confirmed exoplanet

Kepler-440b is a [super-Earth] with a radius 1.86 times that of Earth. The planet orbits Kepler-440 once every 101.1 days.^[1]

Habitability

The planet was announced as being located within the habitable zone of Kepler-440, a region where liquid water could exist on the surface of the planet.^[1]

Notable Exoplanets – Kepler Space Telescope
Confirmed small exoplanets in habitable zones. (Kepler-62e, Kepler-62f, Kepler-186f, Kepler-296e, Kepler-296f, Kepler-438b, Kepler-440b, Kepler-442b) (Kepler Space Telescope; 6 January 2015).[4]

Size comparison

Earth	Kepler-440b

See also

• Habitability of K-type main-sequence star systems
• List of potentially habitable exoplanets