Gliese 649 b

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Gliese 649 b
Extrasolar planet List of extrasolar planets
Parent star
Star Gliese 649
Constellation Hercules
Right ascension (α) 16h 58m 08.850s[1]
Declination (δ) 25° 44′ 38.99″[1]
Apparent magnitude (mV) 9.62
Distance 33.7 ± 0.5[1] ly
(10.3 ± 0.1[1] pc)
Spectral type M1.5V
Orbital elements
Semimajor axis (a) 1.135 (± 0.035) AU
(169.8 Gm)
Periastron (q) 0.795 AU
(118.9 Gm)
Apastron (Q) 1.475 AU
(220.7 Gm)
Eccentricity (e) 0.30 (± 0.08)
Orbital period (P) 598.3 (± 4.2) d
(1.638 y)
Orbital speed (υ) 20.7 km/s
Argument of
periastron
(ω) 352 (± 15)°
Time of periastron (T0) 12876 (± 22) JD
Semi-amplitude (K) 12.4 (± 1.1) m/s
Physical characteristics
Minimum mass (m sin i) 0.328 (± 0.032) MJ
Discovery information
Discovery date 2009-12-17
Discoverer(s) Johnson et al.[2]
Discovery method Radial velocity
Discovery status Published[2]
Other designations
BD+25°3173 b, HIP 83043 b
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBAD data

Gliese 649 b /ˈɡlzə/, or Gl 649 b is an extrasolar planet, orbiting the 10th magnitude M-type star Gliese 649, 10 parsecs from earth. This planet is a sub-Jupiter, massing 0.328 Jupiter mass and orbits at 1.135 AU.[2]

References[edit]

  1. ^ a b c d van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b c Johnson, John Asher et al. (2010). "The California Planet Survey II. A Saturn-Mass Planet Orbiting the M Dwarf Gl649". The Publications of the Astronomical Society of the Pacific 122 (888): 149–155. arXiv:0912.2730. Bibcode:2010PASP..122..149J. doi:10.1086/651007. 


Coordinates: Sky map 16h 58m 09s, +25° 44′ 39″