K2-72e

K2-72e
	Size comparison between K2-72e (left) and the Earth.
Discovery
Discovered by	Crossfield et al.
Discovery site	Kepler Space Observatory
Discovery date	July 18, 2016
Detection method	Transit
Orbital characteristics
Semi-major axis	0.106 +0.009; −0.013 AU
Eccentricity	0.110+0.199; −0.087
Orbital period (sidereal)	24.159 ±0.004 d
Star	K2-72
Physical characteristics
Mean radius	1.29 +0.14; −0.13 R🜨
Mass	~2.21 ME
Temperature	261.15 K (−12.00 °C; 10.40 °F)

K2-72e (also known by its EPIC designation EPIC 206209135.04), is a confirmed exoplanet, likely rocky, orbiting within the habitable zone of the red dwarf star K2-72, the outermost of four such planets discovered in the system by NASA's Kepler spacecraft on its "Second Light" mission. It is located about 217.1 light-years (66.56 parsecs, or nearly 2.0538×10¹⁵ km) away from Earth in the constellation of Aquarius. The exoplanet was found by using the transit method, in which the dimming effect that a planet causes as it crosses in front of its star is measured.^[3]

^ ^a ^b ^c ^d ^e "NASA Exoplanet Archive". NASA Exoplanet Science Institute. 14 October 2020. Retrieved 2020-10-14.
^ ^a ^b Cite error: The named reference PHL was invoked but never defined (see the help page).
^ Crossfield, Ian J. M.; Ciardi, David R.; Petigura, Erik A.; Sinukoff, Evan; Schlieder, Joshua E.; Howard, Andrew W.; Beichman, Charles A.; Isaacson, Howard; Dressing, Courtney D.; Christiansen, Jessie L.; Fulton, Benjamin J.; Lépine, Sébastien; Weiss, Lauren; Hirsch, Lea; Livingston, John (2016-09-01). "197 CANDIDATES AND 104 VALIDATED PLANETS IN K2's FIRST FIVE FIELDS". The Astrophysical Journal Supplement Series. 226 (1): 7. arXiv:1607.05263. Bibcode:2016ApJS..226....7C. doi:10.3847/0067-0049/226/1/7. ISSN 0067-0049.

[K2-72e_archive-1] "NASA Exoplanet Archive". NASA Exoplanet Science Institute. 14 October 2020. Retrieved 2020-10-14.

[PHL-2] Cite error: The named reference PHL was invoked but never defined (see the help page).

[3] Crossfield, Ian J. M.; Ciardi, David R.; Petigura, Erik A.; Sinukoff, Evan; Schlieder, Joshua E.; Howard, Andrew W.; Beichman, Charles A.; Isaacson, Howard; Dressing, Courtney D.; Christiansen, Jessie L.; Fulton, Benjamin J.; Lépine, Sébastien; Weiss, Lauren; Hirsch, Lea; Livingston, John (2016-09-01). "197 CANDIDATES AND 104 VALIDATED PLANETS IN K2's FIRST FIVE FIELDS". The Astrophysical Journal Supplement Series. 226 (1): 7. arXiv:1607.05263. Bibcode:2016ApJS..226....7C. doi:10.3847/0067-0049/226/1/7. ISSN 0067-0049.

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