Gliese 179 b

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Gliese 179 b
Exoplanet List of exoplanets
Parent star
Star Gliese 179
Constellation Orion
Right ascension (α) 04h 52m 05.73s[1]
Declination (δ) +06° 28′ 35.5″[1]
Apparent magnitude (mV) 11.96
Distance 40±2[1] ly
(12.3±0.6[1] pc)
Spectral type M3.5
Mass (m) 0.357±0.030 M
Radius (r) 0.38±0.02 R
Temperature (T) 3370±100 K
Metallicity [Fe/H] 0.30±0.10
Orbital elements
Semi-major axis (a) 2.41±0.04 AU
(~361 Gm)
    ~199 mas
Periastron (q) 1.90±0.22 AU
(~286 Gm)
Apastron (Q) 2.92±0.24 AU
(~436 Gm)
Eccentricity (e) 0.21±0.08
Orbital period (P) 2288±59 d
(~6.26 y)
Orbital speed (υ) 11.5±0.5 km/s
Argument of
(ω) 153±24°
Time of periastron (T0) 25140±104 JD
Semi-amplitude (K) 33.9±6.6 m/s
Physical characteristics
Minimum mass (m sin i) 0.82±0.07 MJ
Discovery information
Discovery date November 13, 2009
Discoverer(s) Howard et al.
Discovery method Radial velocity
Discovery site Keck Observatory
Discovery status Submitted[2]
Other designations
HIP 22627 b
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

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 a little bit less than Jupiter and it orbits at 2.41 AU or 361 Gm 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 radial velocity method from spectrograph taken at Keck Observatory on November 13, 2009.

See also[edit]

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

Related giant planets around red dwarfs:


  1. ^ a b c d van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ Howard, Andrew W.; et al. (2010). "The California Planet Survey. I. Four New Giant Exoplanets". The Astrophysical Journal. 721 (2): 1467–1481. arXiv:1003.3488Freely accessible. Bibcode:2010ApJ...721.1467H. doi:10.1088/0004-637X/721/2/1467. 

Coordinates: Sky map 04h 52m 05.7273s, +06° 28′ 35.542″