Gliese 317 c

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Gliese 317 c
Extrasolar planet List of extrasolar planets
Parent star
Star Gliese 317
Constellation Pyxis
Right ascension (α) 08h 40m 59.21s
Declination (δ) –23° 27′ 22.6″
Apparent magnitude (mV) 12
Distance 49.2 ± 0.72 ly
(15.1 ± 0.22 pc)
Spectral type M3.5V
Mass (m) 0.42 ± 0.05 M
Temperature (T) 3510 ± 50 K
Metallicity [Fe/H] 0.36 ± 0.2
Orbital elements
Semimajor axis (a) ≥5.5 AU
Eccentricity (e) ~(0-0.8)
Orbital period (P) ≥7100+8000
(>19.5 y)
Physical characteristics
Minimum mass (m sin i) 1.6 MJ
Discovery information
Discovery date 6 July 2007 (Announced)
Discoverer(s) Johnson et al.
Discovery method Doppler spectroscopy
Discovery site United States W. M. Keck
Discovery status Unconfirmed
Database references
Extrasolar Planets

Gliese 317 c is a possible extrasolar planet[1][2] approximately 50 light-years away in the constellation of Pyxis. The planet was announced in July 2007 to be orbiting the red dwarf star Gliese 317. The planet is a Jovian planet, at least 1.6 times the mass of Jupiter. Gliese 317 c orbits 5.5 AU or further from its parent star with an orbital period of at least 7100 days. The eccentricity of the orbit is poorly constrained.[2] It is the second known planet in order from Gliese 317.[3]

See also[edit]


  1. ^ Johnson et al.; Butler, R. Paul; Marcy, Geoffrey W.; Fischer, Debra A.; Vogt, Steven S.; Wright, Jason T.; Peek, Kathryn M. G. (2007). "A New Planet Around an M Dwarf: Revealing a Correlation Between Exoplanets and Stellar Mass" (abstract). The Astrophysical Journal 670 (1): 833–840. arXiv:0707.2409. Bibcode:2007ApJ...670..833J. doi:10.1086/521720.  web preprint
  2. ^ a b Anglada-Escude, Guillem et al. (2012). "Astrometry and radial velocities of the planet host M dwarf Gliese 317: new trigonometric distance, metallicity and upper limit to the mass of Gliese 317 b". The Astrophysical Journal 764 (1): 37A. arXiv:1111.2623. Bibcode:2012ApJ...746...37A. doi:10.1088/0004-637X/746/1/37. 
  3. ^ Schneider, Jean. "Planet GJ 317 c". The Extrasolar Planets Encyclopaedia. Retrieved 17 June 2013. 

Coordinates: Sky map 08h 40m 59.21s, −23° 27′ 22.6″