Kepler-62e

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Kepler-62e
Extrasolar planet List of extrasolar planets
Kepler-62f with 62e as Morning Star.jpg
Kepler-62f (foreground) and Kepler-62e (bright, star-like reflection on 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) 3.57[3] M
Radius (r) 1.61 (± 0.05)[2] R
Stellar flux (F) 1.2 ± 0.2
Temperature (T) 270 K
Orbital elements
Semimajor axis (a) 0.427[2] AU
Eccentricity (e) ~0[2]
Orbital period (P) 122.3874[2] d
Inclination (i) 89.98[2]°
Discovery information
Discovery date 18 April 2013[2]
Discoverer(s) Borucki et al.
Discovery method Transit (Kepler Mission)[2]
Other detection methods Transit timing variation
Discovery site Kepler Space Observatory
Discovery status Published refereed article
Other designations
KOI-701.03

Kepler-62e is a super-Earth exoplanet (extrasolar planet) discovered in orbit around the star Kepler-62, the second outermost of five such planets discovered by NASA's Kepler spacecraft. Kepler-62e is located about 1,200 ly (370 pc) from Earth in the constellation of Lyra.[4] The exoplanet was found using the transit method, in which the dimming effect that a planet causes as it crosses in front of its star is measured. Kepler-62e may be a terrestrial or water-ice-dominated solid planet; it lies in the inner part of its host star's habitable zone[2][5] and has an Earth Similarity Index of 0.83.

Given the planet's age (7 ± 4 billion years), stellar flux (1.2 ± 0.2 times Earth's) and radius (1.61 ± 0.05 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 suggests it is likely that a great majority of planets in Kepler-62e's size range are completely covered by ocean.[6][7]

Kepler-62e orbits its host star every 122 days and is roughly 60 percent larger than Earth.[8]

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


See also[edit]

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 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 340 (6132): 587. 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. ^ Kepler-62e: Super-Earth and Possible Water World
  5. ^ 3 Potentially Habitable 'Super-Earths' Explained (Infographic)
  6. ^ "Water worlds surface: Planets covered by global ocean with no land in sight". Harvard Gazette. 2013-04-18. Retrieved 2013-04-19. 
  7. ^ 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 1304: 5058. arXiv:1304.5058. Bibcode:2013arXiv1304.5058K. 
  8. ^ Super-Earths: Two Earth-like planets that could host life discovered. Indian Express. April 20, 2013

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