Gliese 667 Cf

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Gliese 667 Cf
Extrasolar planet List of extrasolar planets
Parent star
Star Gliese 667C
Constellation Scorpius
Right ascension (α) 17h 18m 57.16483s
Declination (δ) −34° 59′ 23.1416″
Apparent magnitude (mV) 11.03
Mass (m) 0.31 M
Radius (r) 0.42 R
Temperature (T) 3700 K
Metallicity [Fe/H] −0.59 ± 0.10
Age 2–10 Gyr
Physical characteristics
Mass (m) 3.12[1] M
Radius (r) 1.52 [1] R
Stellar flux (F) 0.58
Temperature (T) 239 K
Orbital elements
Semimajor axis (a) 0.15575 ± 0.00017 AU
Eccentricity (e) 0.001
Orbital period (P) 39.0819 d
Inclination (i) >30°
Semi-amplitude (K) 1.2 m/s
Discovery information
Discovery date 2013
Discovery method Radial velocity (European Southern Observatory)
Discovery status Unconfirmed

Gliese 667 Cf is an unconfirmed exoplanet orbiting around the star Gliese 667C, which is a member of the Gliese 667 triple star system. It is slightly less massive than Gliese 667 Cc. Orbital-stability analysis indicates that it cannot be more than twice of its minimum mass. It is located in the middle of the habitable zone.

Although Gliese 667 Cf receives less than 60% of the visible starlight compared to Earth, it receives more infrared radiation than Earth. Based on the black-body temperature calculation, the total amount of starlight absorbed is higher.[2]

Re-analysis of the data by Feroz and Hobson (2014) indicates that the detection of this planet was actually a result of failing to properly account for correlated noise in the radial-velocity data.[3]


  1. ^ a b PHL's Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo
  2. ^ Anglada-Escudé, Guillem, et al (2013-06-07). "A dynamically-packed planetary system around GJ 667C with three super-Earths in its habitable zone". Astronomy & Astrophysics. arXiv:1306.6074. Bibcode:2013A&A...556A.126A. doi:10.1051/0004-6361/201321331. Retrieved 2013-06-25. 
  3. ^ Feroz, F.; Hobson, M. P. (2014). "Bayesian analysis of radial velocity data of GJ667C with correlated noise: evidence for only two planets". Monthly Notices of the Royal Astronomical Society 437 (4): 3540–3549. arXiv:1307.6984. Bibcode:2014MNRAS.437.3540F.