Kepler-62f

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Kepler-62f
Extrasolar planet List of extrasolar planets
Kepler-62f with 62e as Morning Star.jpg
Kepler-62f (foreground) and Kepler-62e (right) are habitable zone exoplanets orbiting the star Kepler-62 (center).
Parent star
Star Kepler-62 (KOI-701)
Constellation Lyra
Right ascension (α) 18h 52m 51.06019s
Declination (δ) +45° 20′ 59.507″
Apparent magnitude (mV) 13.654[1]
Distance ~1200 ly
(~368[2] pc)
Mass (m) 0.69 (± 0.02)[2] M
Radius (r) 0.64 (± 0.02)[2] R
Temperature (T) 4925 (± 70)[2] K
Metallicity [Fe/H] -0.37 (± 0.04)[2]
Age 7 (± 4)[2] Gyr
Physical characteristics
Mass (m) 2.57[3] M
Radius (r) 1.41 (± 0.07)[2] R
Stellar flux (F) 0.41 ± 0.05
Temperature (T) 208 K
Orbital elements
Semimajor axis (a) 0.718[2] AU
Eccentricity (e) ~0[2]
Orbital period (P) 267.291[2] d
Inclination (i) 89.90[2]°
Discovery information
Discovery date 18 April 2013[2]
Discoverer(s) Eric Agol[4]
Discovery method Transit (Kepler Mission)[2]
Other detection methods n/a
Discovery site Kepler Space Observatory
Discovery status Published refereed article
Other designations
KOI-701.04

Kepler-62f[2][4][5] (also known by its Kepler Object of Interest designation KOI-701.04) is a super-Earth exoplanet (extrasolar planet) in orbit around the star Kepler-62, the outermost of five such planets discovered by NASA's Kepler spacecraft. Kepler-62f is located about 1200 light-years (370 parsecs) from Earth in the constellation of Lyra.[6] 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. Kepler-62f may be a terrestrial or water-dominated solid planet; it lies within the outer part of its host star's habitable zone[2][7] and has an Earth Similarity Index of 0.69.

Confirmed exoplanet and host star[edit]

Kepler-62f, a super-Earth, has a radius 1.4 times that of Earth.[2] The planet orbits a star that is slightly smaller and cooler than the Sun, named Kepler-62, which is orbited by a total of five transiting planets, of which Kepler-62f has the longest orbital period.[2] The star would appear a slight peach color to the naked eye, and, as viewed from planet Kepler-62f, would have an angular size about 90% as large as the Sun seen from Earth.[2]

Habitability[edit]

Given the planet's age (7 ± 4 billion years), irradiance (0.41 ± 0.05 times Earth's) and radius (1.41 ± 0.07 times Earth's), a rocky (silicate-iron) composition with the addition of a possibly substantial amount of water is considered plausible.[2] A modeling study accepted in The Astrophysical Journal indicates it is likely that a great majority of planets in its size range are completely covered by ocean (possibly frozen, if Kepler-62f is indeed such a planet).[8][9] If its density is the same as Earth's, its mass would be 1.413 or 2.80 times Earth's.

Comparison of the sizes of planets Kepler-69c, Kepler-62e, Kepler-62f, and the Earth. (All planets except the Earth are artists' conceptions.)
The Kepler Space Telescope search volume, in the context of the Milky Way Galaxy.


Cultural impact[edit]

On May 9, 2013, a congressional hearing by two U.S. House of Representatives subcommittees discussed "Exoplanet Discoveries: Have We Found Other Earths?," prompted by the discovery of exoplanet Kepler-62f, along with Kepler-62e and Kepler-69c. A related special issue of the journal Science, published earlier, described the discovery of the exoplanets.[10] Kepler-62f and the other Kepler-62 exoplanets are being specially targeted as part of the SETI search programs.[11]

See also[edit]

Kepler-62e, another exoplanet in the Kepler-62 system

References[edit]

  1. ^ "Kepler Input Catalog search result". Space Telescope Science Institute. Retrieved 2013-04-18. 
  2. ^ a b c d e f g h i j k l m n o p q r s Borucki, William J.; et al. (18 April 2013). "Kepler-62: A Five-Planet System with Planets of 1.4 and 1.6 Earth Radii in the Habitable Zone". Science Express. arXiv:1304.7387. Bibcode:2013Sci...340..587B. doi:10.1126/science.1234702. Retrieved 18 April 2013. 
  3. ^ PHL's Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo
  4. ^ a b Johnson, Michele; Harrington, J.D. (18 April 2013). "NASA's Kepler Discovers Its Smallest 'Habitable Zone' Planets to Date". NASA. Retrieved 18 April 2013. 
  5. ^ Overbye, Dennis (18 April 2013). "2 Good Places to Live, 1,200 Light-Years Away". New York Times. Retrieved 18 April 18. 
  6. ^ Kepler-62f: A Possible Water World
  7. ^ 3 Potentially Habitable 'Super-Earths' Explained (Infographic)
  8. ^ "Water worlds surface: Planets covered by global ocean with no land in sight". Harvard Gazette. 2013-04-18. Retrieved 2013-04-19. 
  9. ^ Kaltenegger, L.; Sasselov, D.; Rugheimer, S. (2013-04-18 [preprint]). "Water Planets in the Habitable Zone: Atmospheric Chemistry, Observable Features, and the case of Kepler-62e and -62f". The Astrophysical Journal. arXiv:1304.5058. Bibcode:2013arXiv1304.5058K. 
  10. ^ Staff (May 3, 2013). "Special Issue: Exoplanets". Science. Retrieved May 18, 2013. 
  11. ^ "Has Kepler Found Ideal SETI-target Planets?". SETI Institute. 19 April 2013. Retrieved 17 September 2013. 

External links[edit]

Coordinates: Sky map 18h 52m 51.06019s, +45° 20′ 59.507″