Kepler-442b

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Exoplanet
Kepler-442 b

Approximate size of Kepler-442b (right) compared to Earth

Approximate size of Kepler-442b (right) compared to Earth
Constellation lyre
Position
equinox : J2000.0
Right ascension 19h 01m 27.98s
declination + 39 ° 16 ′ 48.30 ″
Orbit data
Central star Kepler 442
Major semi-axis 0.40900 AU
eccentricity 0.04  +0.08−0.04
Period of circulation 112.30530000 d
Further data
radius 1,340
distance 342 pc
history
Date of discovery 2015
Catalog names
KOI-4742.01, Kepler-442 b, KOI-4742 b, K04742.01, WISE J190127.98 + 391648.2 b, KIC 4138008 b, 2MASS J19012797 + 3916482 b

Kepler-442b (also KOI-4742.01 ) is a confirmed and almost Earth-sized exoplanet , very likely a rocky planet , which orbits the K-star Kepler-442 in the constellation Lyra in its habitable zone . The planet was prepared by the space telescope Kepler the NASA using the Transit method discovered, the slight darkening of the star is measured in the pass of the planet. NASA announced the confirmation of the exoplanet on January 6, 2015.

Confirmed exoplanet

Kepler-442b is an exoplanet with a radius of 1.34 earth radii . The planet orbits Kepler-442, a bright orange star belonging to spectral class K, in 112.3 days.

Habitability

The planet is in the habitable zone of Kepler-442, where liquid water could exist on its surface . When its discovery was announced, Kepler-442b was named one of the most Earth-like planets in terms of its size and temperature that had been found by then.

Small exoplanets discovered and confirmed by Kepler in habitable zones (status: January 2015)

See also

Individual evidence

  1. ↑ a b c Guillermo Torres, David M. Kipping, Francois Fressin, Douglas A. Caldwell, Joseph D. Twicken, Sarah Ballard, Natalie M. Batalha, Stephen T. Bryson, David R. Ciardi, Christopher E. Henze, Steve B Howell, Howard T. Isaacson, Jon M. Jenkins, Philip S. Muirhead, Elisabeth R. Newton, Erik A. Petigura, Thomas Barclay, William J. Borucki, Justin R. Crepp, Mark E. Everett, Elliott P. Horch , Andrew W. Howard, Rea Kolbl, Geoffrey W. Marcy, Sean McCauliff, Elisa V. Quintana: Validation of Twelve Small Kepler Transiting Planets in the Habitable Zone . arxiv : 1501.01101 .
  2. ↑ a b c d e Jet Propulsion Laboratory: NASA's Kepler Marks 1,000th Exoplanet Discovery, Uncovers More Small Worlds in Habitable Zones. Retrieved April 7, 2015 .
  3. ↑ a b c d The Guardian: Kepler 438b: Most Earth-like planet ever discovered could be home for alien life. Retrieved April 7, 2015 .
  4. ^ The Extrasolar Planets Encyclopaedia: Planet Kepler-442 b. Retrieved April 7, 2015 .
  5. ↑ a b Paul Gilster: AAS: 8 New Planets in Habitable Zone. Retrieved April 7, 2015 .

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