Astronomy:Kepler-68d

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Kepler-68d
Discovery
Discovery dateFebruary 12, 2013
Radial velocity
Orbital characteristics
Periastron1.148 AU
Apoastron1.652 AU
1.4±0.03 AU[1]
Eccentricity0.18 ± 0.05
Orbital period580±50 d
Physical characteristics
Mass≥0.947 Mj


Kepler-68d is a gas giant with the minimum mass about the same as Jupiter. It is at least a jovian-mass planet orbiting 1.4 astronomical units from its parent star, Kepler-68, well within habitable zone of the star.[2] It was detected by radial velocity.[3]

After planets Kepler-68b and c were detected by observing planetary transits in front of its star, doppler spectroscopy measurements were used to make follow-up observations of the star. Kepler-68d was discovered using that method.

References

  1. "Kepler Discoveries". kepler.nasa.gov. http://kepler.nasa.gov/Mission/discoveries/. 
  2. Gilliland, Ronald L. et al. (2013). "Kepler-68: Three Planets, One with a Density Between That of Earth and Ice Giants". The Astrophysical Journal 766 (1): 40. doi:10.1088/0004-637X/766/1/40. Bibcode2013ApJ...766...40G. 
  3. Exoplanet. "Planet Kepler-68 d". Exoplanet.eu. http://voparis-exoplanet-new.obspm.fr/catalog/kepler-68_d/. 

External links