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
−1500
d
(>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
Encyclopaedia
data
SIMBAD data

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]

References[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″