K2-66b

K2-66b
Discovery
Discovered by	K2
Discovery date	2017
Detection method	Transit
Orbital characteristics
Semi-major axis	0.05983±0.00072 AU
Orbital period (sidereal)	5.06963±0.00081 d
Inclination	86.6+4.4; −2.4°
Star	K2-66
Physical characteristics
Mean radius	2.49 R🜨
Mass	0.06702 MJ
Mean density	7.6 g/cm3

K2-66b is a confirmed^[2]^[3]^{[failed verification]} mega-Earth orbiting the subgiant K2-66, about 520 parsecs (1,700 ly) from Earth in the direction of Aquarius.^[1] It is an extremely hot and dense planet heavier than Neptune, but with only about half its radius.^[4]

^ ^a ^b ^c ^d "The Extrasolar Planet Encyclopaedia — K2-66 b". Extrasolar Planets Encyclopaedia. Retrieved 30 January 2021.
^ Cite error: The named reference :3 was invoked but never defined (see the help page).
^ "K2-66 - Universe Guide". www.universeguide.com. Retrieved 7 July 2021.
^ Sinukoff, Evan; Howard, Andrew W.; Petigura, Erik A.; Fulton, Benjamin J.; Crossfield, Ian J. M.; Isaacson, Howard; Gonzales, Erica; Crepp, Justin R.; Brewer, John M.; Hirsch, Lea; Weiss, Lauren M.; Ciardi, David R.; Schlieder, Joshua E.; Benneke, Bjoern; Christiansen, Jessie L.; Dressing, Courtney D.; Hansen, Brad M. S.; Knutson, Heather A.; Kosiarek, Molly; Livingston, John H.; Greene, Thomas P.; Rogers, Leslie A.; Lépine, Sébastien (2017). "K2-66b and K2-106b: Two Extremely Hot Sub-Neptune-size Planets with High Densities". The Astronomical Journal. 153 (6): 271. arXiv:1705.03491. Bibcode:2017AJ....153..271S. doi:10.3847/1538-3881/aa725f. S2CID 31572527.

[exoplanet.eu-1] "The Extrasolar Planet Encyclopaedia — K2-66 b". Extrasolar Planets Encyclopaedia. Retrieved 30 January 2021.

[:3-2] Cite error: The named reference :3 was invoked but never defined (see the help page).

[:5-3] "K2-66 - Universe Guide". www.universeguide.com. Retrieved 7 July 2021.

[:1-4] Sinukoff, Evan; Howard, Andrew W.; Petigura, Erik A.; Fulton, Benjamin J.; Crossfield, Ian J. M.; Isaacson, Howard; Gonzales, Erica; Crepp, Justin R.; Brewer, John M.; Hirsch, Lea; Weiss, Lauren M.; Ciardi, David R.; Schlieder, Joshua E.; Benneke, Bjoern; Christiansen, Jessie L.; Dressing, Courtney D.; Hansen, Brad M. S.; Knutson, Heather A.; Kosiarek, Molly; Livingston, John H.; Greene, Thomas P.; Rogers, Leslie A.; Lépine, Sébastien (2017). "K2-66b and K2-106b: Two Extremely Hot Sub-Neptune-size Planets with High Densities". The Astronomical Journal. 153 (6): 271. arXiv:1705.03491. Bibcode:2017AJ....153..271S. doi:10.3847/1538-3881/aa725f. S2CID 31572527.

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