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Discovery siteKepler Space Observatory
Discovery date2015[2]
Orbital characteristics
0.24200 AU (36,203,000 km)
101.11141000 d
Physical characteristics
Mean radius
1.860 R
Temperature273 K (0 °C; 32 °F).[3]

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]

Confirmed exoplanet[edit]

Size comparison
Earth Kepler-440b
Small Earth.jpg 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]


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 ExoplanetsKepler 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]

See also[edit]


  1. ^ a b c d Torres, Guillermo; Kipping, David M.; Fressin, Francois; Caldwell, Douglas A.; Twicken, Joseph D.; Ballard, Sarah; Batalha, Natalie M.; Bryson, Stephen T.; Ciardi, David R.; Henze, Christopher E.; Howell, Steve B.; Isaacson, Howard T.; Jenkins, Jon M.; Muirhead, Philip S.; Newton, Elisabeth R.; Petigura, Erik A.; Barclay, Thomas; Borucki, William J.; Crepp, Justin R.; Everett, Mark E.; Horch, Elliott P.; Howard, Andrew W.; Kolbl, Rea; Marcy, Geoffrey W.; McCauliff, Sean; Quintana, Elisa V. (2015). "Validation of Twelve Small Kepler Transiting Planets in the Habitable Zone". The Astrophysical Journal. 800 (2): 99. arXiv:1501.01101. Bibcode:2015ApJ...800...99T. doi:10.1088/0004-637X/800/2/99.
  2. ^ Staff (2015). "Planet Kepler-440 b". The Extrasolar Planets Encyclopaedia. Retrieved 11 January 2015.
  3. ^ "HEC: Data of Potential Habitable Worlds".
  4. ^ a b Clavin, Whitney; Chou, Felicia; Johnson, Michele (6 January 2015). "NASA's Kepler Marks 1,000th Exoplanet Discovery, Uncovers More Small Worlds in Habitable Zones". NASA. Retrieved 6 January 2015.

External links[edit]

Coordinates: Sky map 19h 01m 23.99s, +41° 27′ 07.94″