Kepler-442b

Kepler-442b[1][2][3]
Extrasolar planet List of extrasolar planets

Approximate size comparison of Kepler-442b (right) with Earth
Parent star
Star Kepler-442
Constellation Lyra[2]
Right ascension (α) 19h 01m 27.98s
Declination (δ) +39° 16′ 48.30″
Apparent magnitude (mV) 14.976
Distance1120; 1100[2] ly
(342[3] pc)
Mass (m) 0.610[3] M☉
Radius (r) 0.600[3] R☉
Temperature (T) 4402[3] K
Metallicity [Fe/H] -0.370[3]
Age ~2.9[3] Gyr
Physical characteristics
Radius(r)1.340[3] R⊕
Stellar flux(F⊙)0.66[3] ⊕
Temperature (T) 233 K (−40 °C; −40 °F)[4]
Orbital elements
Semimajor axis(a) 0.40900 AU
Eccentricity (e) 0.04 (+0.08, −0.04)[3]
Orbital period(P) 112.30530000 d
Inclination (i) 89.940°
Discovery information
Discovery date 2015[3][5]
Discoverer(s)
Discovery method Transit
Discovery site Kepler Space Observatory
Discovery status To be published in refereed article
Other designations
KOI-4742.01; Kepler-442 b; KOI-4742 b; K04742.01; WISE J190127.98+391648.2 b; KIC 4138008 b; 2MASS J19012797+3916482 b
Database references
Extrasolar Planets
Encyclopaedia		data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

Kepler-442b (also known by its Kepler Object of Interest designation KOI-4742.01) is a confirmed near-Earth-sized exoplanet, likely rocky, orbiting within the habitable zone of the K-type star[6] Kepler-442, about 1,120 light-years (342 pc) from Earth in the constellation Lyra.[1][2] The planet was discovered by NASA's Kepler spacecraft using the transit method, in which the dimming effect that a planet causes as it crosses in front of its star is measured. NASA announced the confirmation of the exoplanet on 6 January 2015.[1]

Confirmed exoplanet

Kepler-442b is a near-Earth-sized exoplanet with a radius 1.34 times that of Earth. The planet orbits the K-type star[6] Kepler-442 once every 112.3 days.[1][2]

Habitability

The planet was announced as being located within the habitable zone of Kepler-442, a region where liquid water could exist on the surface of the planet. It was described as being one of the most Earth-like planets, in terms of size and temperature, yet found.[1][2]

Notable Exoplanets – Kepler Space Telescope
Confirmed small exoplanets in habitable zones.
(Kepler-62e, Kepler-62f, Kepler-186f, Kepler-296e, Kepler-296f, Kepler-438b, Kepler-440b, Kepler-442b)
(Kepler Space Telescope; January 6, 2015).[1]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Clavin, Whitney; Chou, Felicia; Johnson, Michele (6 January 2015). "NASA's Kepler Marks 1,000th Exoplanet Discovery, Uncovers More Small Worlds in Habitable Zones". NASA. Retrieved 6 January 2015.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Sample, Ian (7 January 2015). "Kepler 438b: Most Earth-like planet ever discovered could be home for alien life". The Guardian. Retrieved 7 January 2015.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 Torres, Guillermo; Kipping, David M.; Fressin, Francois; Caldwell, Douglas A.; Twicken, Joseph D.; Ballard, Sarah; Batalha, Natalie M.; Bryson, Stephen T.; Ciardi, David R.; Henze, Christopher E.; Howell, Steve B.; Isaacson, Howard T.; Jenkins, Jon M.; Muirhead, Philip S.; Newton, Elisabeth R.; Petigura, Erik A.; Barclay, Thomas; Borucki, William J.; Crepp, Justin R.; Everett, Mark E.; Horch, Elliott P.; Howard, Andrew W.; Kolbl, Rea; Marcy, Geoffrey W.; McCauliff, Sean; Quintana, Elisa V. (2015). "Validation of Twelve Small Kepler Transiting Planets in the Habitable Zone". arXiv:1501.01101 [astro-ph.EP].
  4. ↑ "HEC: Data of Potential Habitable Worlds".
  5. ↑ Staff (2015). "Planet Kepler-442 b". The Extrasolar Planets Encyclopaedia. Retrieved 11 January 2015.
  6. ↑ 6.0 6.1 Gilster, Paul (6 January 2015). "AAS: 8 New Planets in Habitable Zone". Centauri-dreams.org. Retrieved 9 January 2015.

External links

Wikimedia Commons has media related to Kepler Mission.

Coordinates: 19h 01m 27.98s, +39° 16′ 48.30″