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] 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]

Planet properties

Mass, radius, and temperature

K2-66b is a mega-Earth with radius 2.49 R_🜨 and mass 21.3 M_E.^[5] The planet's temperature is highly variable due to the variability of its host star, and is currently estimated at 1,372 K (1,099 °C; 2,010 °F).^[2]

Orbit

The planet orbits every 5.07 days at 0.06 AU.^[1] It orbits within a "photoevaporation desert", where orbiting exoplanets should be very uncommon.^[4]^[6] K2-66b's orbit is nearly circular.^[2]^[7]

Star

The star,^[8] K2-66 is a G1 sub-giant in Aquarius.^[5] It has a sun-like temperature of 5887 K,^[1]^[2] which corresponds to its spectral class and is very close to that of the rotationally variable^[9] star Kepler-130.^[10]^[11]^[12] It has a radius of 1.67 R_☉ and a mass of 1.11 M_☉.^[2] Its metallicity is −0.047, and its apparent magnitude is 11.71.^[1]

References

^ ^a ^b ^c ^d ^e ^f ^g "The Extrasolar Planet Encyclopaedia — K2-66 b". Extrasolar Planets Encyclopaedia. Retrieved 30 January 2021.
^ ^a ^b ^c ^d ^e "Open Exoplanet Catalogue - K2-66 b". openexoplanetcatalogue.com. Retrieved 26 June 2021.
^ "K2-66 - Universe Guide". www.universeguide.com. Retrieved 7 July 2021.
^ ^a ^b 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.
^ ^a ^b Futó, P. (2018). Kepler-145b and K2-66b: A Kepler- and a K2-Mega-Earth with Different Compositional Characteristics. Lunar and Planetary Science Conference. No. 2083. p. 1224. Bibcode:2018LPI....49.1224F.
^ Sinukoff, Evan; et al. (31 May 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.
^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 25 June 2021.
^ "K2-66". sim-id. Retrieved 7 July 2021. {{cite web}}: Check |url= value (help)^{[permanent dead link]}
^ "Kepler-130". sim-id. Retrieved 7 July 2021. {{cite web}}: Check |url= value (help)^{[permanent dead link]}
^ "Kepler-130 | NASA Exoplanet Archive".
^ "The Extrasolar Planet Encyclopaedia — Kepler-130 d". Extrasolar Planets Encyclopaedia. Retrieved 28 June 2021.
^ "Open Exoplanet Catalogue - Kepler-130 d". www.openexoplanetcatalogue.com. Retrieved 28 June 2021.

External links

Zdroj:https://en.wikipedia.org?pojem=K2-66b
Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia.

[exoplanet.eu-1] ^ ^a ^b ^c ^d ^e ^f ^g "The Extrasolar Planet Encyclopaedia — K2-66 b". Extrasolar Planets Encyclopaedia. Retrieved 30 January 2021.

[:3-2] "Open Exoplanet Catalogue - K2-66 b". openexoplanetcatalogue.com. Retrieved 26 June 2021.

[: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.

[:0-5] Futó, P. (2018). Kepler-145b and K2-66b: A Kepler- and a K2-Mega-Earth with Different Compositional Characteristics. Lunar and Planetary Science Conference. No. 2083. p. 1224. Bibcode:2018LPI....49.1224F.

[6] Sinukoff, Evan; et al. (31 May 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.

[:2-7] "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 25 June 2021.

[8] "K2-66". sim-id. Retrieved 7 July 2021. {{cite web}}: Check |url= value (help)^{[permanent dead link]}

[9] "Kepler-130". sim-id. Retrieved 7 July 2021. {{cite web}}: Check |url= value (help)^{[permanent dead link]}

[10] "Kepler-130 | NASA Exoplanet Archive".

[11] "The Extrasolar Planet Encyclopaedia — Kepler-130 d". Extrasolar Planets Encyclopaedia. Retrieved 28 June 2021.

[12] "Open Exoplanet Catalogue - Kepler-130 d". www.openexoplanetcatalogue.com. Retrieved 28 June 2021.

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