Kepler-42c

Kepler-42 c
Exoplanet List of exoplanets

Sizes of Earth-like planets, including Mars, Kepler-42c (KOI-961.02), Kepler-20e, Kepler-20f and Earth.
Parent star
Star Kepler-42
Constellation Cygnus
Right ascension (α) 19h 28m 52.56s
Declination (δ) +44° 37 09.6
Apparent magnitude (mV) 10.64
Distance727 ly
(223 pc)
Spectral type M
Orbital elements
Semi-major axis(a) ~ 0.0060[1] AU
Orbital period(P) 0.45328509 ± 9.7×10−7[2] d
Inclination (i) 85.06+0.15
0.16
°
Time of transit (Tt) 2454966.86952 ± 4.2×10−4 JD
Physical characteristics
Radius(r)0.73 ± 0.20[2] R
Stellar flux(F)67
Temperature (T) 720 ± 73[2]
Discovery information
Discovery date January 11, 2012
Discoverer(s) Philip S. Muirhead et al.[2]
Discovery method Transit (Kepler)
Other detection methods Transit-timing variations
Discovery site In space
Discovery status Published
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

Kepler-42 c, previously KOI-961.02 then KOI-961 c, is an exoplanet orbiting Kepler-42 (previously KOI-961), a star located about 126 light-years (38.7 pc) from the Solar System, in the constellation of Cygnus. A planetary system of at least three exoplanets with sizes between Mars and Venus has been detected around this red dwarf on January 11, 2012 by the method of transits with the help of the space telescope Kepler:

Kepler-42 c would be a 0.73-Earth-radius planet orbiting its star in a little less than 11 hours at about 0.006 AU of its host star, creating an average equilibrium temperature of about 445 °C (833 °F).

Notes and references

  1. Exoplanet.eu – 12 janvier 2012 « Planet: KOI-961c ».
  2. 1 2 3 4 Philip S. Muirhead, John Asher Johnson, Kevin Apps, Joshua A. Carter, Timothy D. Morton, Daniel C. Fabrycky, J. Sebastian Pineda, Michael Bottom, Barbara Rojas-Ayala, Everett Schlawin, Katherine Hamren, Kevin R. Covey, Justin R. Crepp, Keivan G. Stassun, Joshua Pepper, Leslie Hebb, Evan N. Kirby, Andrew W. Howard, Howard T. Isaacson, Geoffrey W. Marcy, David Levitan, Tanio Diaz-Santos, Lee Armus, James P. Lloyd, « Characterizing the Cool KOIs III. KOI-961: A Small Star with Large Proper Motion and Three Small Planets » accepté pour publication dans The Astrophysical JournalarXiv:1201.2189v1.


This article is issued from Wikipedia - version of the Monday, October 05, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.