Gliese 179 b (original) (raw)

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Exoplanet which orbits the red dwarf star Gliese 179

Gliese 179 b

Discovery[1]
Discovered by Howard et al.
Discovery site Keck Observatory
Discovery date November 13, 2009
Detection method Radial velocity
Orbital characteristics[2]
Semi-major axis 2.424+0.071−0.075 AU
Eccentricity 0.179+0.048−0.044
Orbital period (sidereal) 2303+34−31 d6.306+0.094−0.086 yr
Inclination 61°+16°−13° or 119°+13°−16°
Longitude of ascending node 62°+99°−44°
Time of periastron 2457301+125−150
Argument of periastron 129°+21°−19°
Semi-amplitude 33.9±6.6
Star Gliese 179
Physical characteristics[2]
Mass 0.95+0.16−0.11 _M_J

Gliese 179 b (also known as HIP 22627 b) is an extrasolar planet which orbits the M-type main sequence star Gliese 179, located approximately 40 light years away in the constellation Orion. This planet has a minimum mass somewhat less than Jupiter and it orbits at 2.42 AU from the star with an eccentricity slightly less than Pluto. The planetary distance ranges from 1.90 to 2.92 AU. This planet was discovered by using the radial velocity method from spectrograph taken at Keck Observatory on November 13, 2009.[1] In 2023, the inclination and true mass of Gliese 179 b were determined via astrometry.[2]

Other planets that were discovered or confirmed on November 13, 2009:

Other giant planets around red dwarfs:

  1. ^ a b Howard, Andrew W.; et al. (2010). "The California Planet Survey. I. Four New Giant Exoplanets". The Astrophysical Journal. 721 (2): 1467–1481. arXiv:1003.3488. Bibcode:2010ApJ...721.1467H. doi:10.1088/0004-637X/721/2/1467. S2CID 14147776.
  2. ^ a b c Xiao, Guang-Yao; Liu, Yu-Juan; et al. (March 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. arXiv:2303.12409.