Kepler-440b

Kepler-440b^[1]
Discovery
Discovery site	Kepler Space Observatory
Discovery date	2015
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).

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]

^ ^a ^b Cite error: The named reference Keplercitepaper-060115 was invoked but never defined (see the help page).
^ Staff (2015). "Planet Kepler-440 b". Extrasolar Planets Encyclopaedia. Retrieved 11 January 2015.
^ "HEC: Data of Potential Habitable Worlds". Archived from the original on 1 June 2012. Retrieved 25 January 2015.
^ 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.

[Keplercitepaper-060115-1] Cite error: The named reference Keplercitepaper-060115 was invoked but never defined (see the help page).

[EXP-2015-440b-2] Staff (2015). "Planet Kepler-440 b". Extrasolar Planets Encyclopaedia. Retrieved 11 January 2015.

[UPR-Catalog-3] "HEC: Data of Potential Habitable Worlds". Archived from the original on 1 June 2012. Retrieved 25 January 2015.

[NASA-20150106-4] 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.

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