K2-66b

K2-66b
Discovery
Discovered byK2
Discovery date2017
Transit
Orbital characteristics
0.05983±0.00072 AU
5.06963±0.00081 d
Inclination86.6+4.4
−2.4°
StarK2-66
Physical characteristics
2.49 R🜨
Mass0.06702 MJ
Mean density
7.6 g/cm3

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

Planet properties

Mass, radius, and temperature

K2-66b is a mega-Earth with radius 2.49 R🜨 and mass 21.3 M🜨. 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).

Orbit

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

Star

The star, K2-66 is a G1 sub-giant in Aquarius. It has a sun-like temperature of 5887 K, which corresponds to its spectral class and is very close to that of the rotationally variable star Kepler-130. It has a radius of 1.67 R☉ and a mass of 1.11 M☉. Its metallicity is −0.047, and its apparent magnitude is 11.71.

See also

References

  1. 1 2 3 4 5 6 7 "The Extrasolar Planet Encyclopaedia — K2-66 b". Extrasolar Planets Encyclopaedia. Retrieved 30 January 2021.
  2. 1 2 3 4 5 "Open Exoplanet Catalogue - K2-66 b". openexoplanetcatalogue.com. Retrieved 26 June 2021.
  3. 1 2 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.
  4. 1 2 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.
  5. ↑ 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.
  6. ↑ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 25 June 2021.
  7. ↑ "K2-66". sim-id. Retrieved 7 July 2021.[permanent dead link]
  8. ↑ "Kepler-130". sim-id. Retrieved 7 July 2021.[permanent dead link]
  9. ↑ "Kepler-130 | NASA Exoplanet Archive".
  10. ↑ "The Extrasolar Planet Encyclopaedia — Kepler-130 d". Extrasolar Planets Encyclopaedia. Retrieved 28 June 2021.
  11. ↑ "Open Exoplanet Catalogue - Kepler-130 d". www.openexoplanetcatalogue.com. Retrieved 28 June 2021.