Kepler-438

Kepler-438
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 18h 46m 34.993s[1]
Declination +41° 57′ 03.93″[1]
Apparent magnitude (V) 15.0[2]
Astrometry
Distance473 ± 75 ly
(145 ± 23[3] pc)
Absolute magnitude (MV)9.55+0.54
−0.44[3]
Details[3]
Mass0.544+0.061
−0.041 M☉
Radius0.52+0.061
−0.038 R☉
Luminosity0.044+0.017
−0.012 L☉
Surface gravity (log g)4.74 cgs
Temperature5541±60 K
Metallicity [Fe/H]0.16±0.14 dex
Age4.4+0.7
−0.8 Gyr
Other designations
KIC 6497146, KOI-3284, 2MASS J18463499+4157039[4]
Database references
SIMBADdata
KICdata

Kepler-438 is a red dwarf in the constellation Lyra, about 470 light years from Earth and it is 1.5 the diameters of Earth.[5] Kepler-438b is the 1000th exo planet discovered and it was discovered in 2015 by NASA'S Kepler space telescopes.[6] It is notable for its planetary system, which includes Kepler-438b, a possibly Earth-size planet within Kepler-438's habitable zone. Alongside the discovery of Kepler-438 came the discovery of another exoplanet, Kepler-442b, both of which orbit smaller stars than of our own star.[7]

The Kepler-438 planetary system[2]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b — 0.166 35.23319 0.03 89.86° 0.0999 ± 0.015 RJ

References

  1. 1 2 Cutri, R. M. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. Bibcode:2003yCat.2246....0C.
  2. 1 2 "Notes on Kepler-438 b". exoplanet.eu. Retrieved 21 January 2017.
  3. 1 2 3 Torres, Guillermo; et al. (2015). "Validation of Twelve Small Kepler Transiting Planets in the Habitable Zone". American Astronomical Society. Bibcode:2015AAS...22543802C. arXiv:1501.01101 Freely accessible. doi:10.1088/0004-637X/800/2/99.
  4. ↑ "KOI-3284". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 January 2017.
  5. ↑ NASA's Kepler Marks 1,000th Exoplanet Discovery, Uncovers More Small Worlds in Habitable Zones
  6. ↑ "Kepler Discovers 1000th Exoplanet | Science Mission Directorate". science.nasa.gov. Retrieved 2017-05-09.
  7. ↑ "Alien earth 'could support life', but what is Kepler 438b like?". The Week UK. Retrieved 2017-05-09.


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