Kepler-42c
| Exoplanet | List of exoplanets | |
|---|---|---|
 | ||
| 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 |
| Distance | 727 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 | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
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
- ↑ Exoplanet.eu – 12 janvier 2012 « Planet: KOI-961c ».
- 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 Journal – arXiv:1201.2189v1.
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