Gliese 581 b

Also known as BD-07 4003b, TIC 36853511b

extrasolar planet

Key facts

Discovered by: X. Bonfils, T. Forveille, X. Delfosse, S. Udry , M. Mayor , C. Perrier, F. Bouchy, F. Pepe, D. Queloz , J.-L. Bertaux
Discovery date: August 22, 2005, announced November 30, 2005
Detection method: Doppler spectroscopy
Semi major axis: 0.0399 ± 0.0005 AU
Eccentricity: 0.0342 +0.009, −0.010
Orbital period sidereal: 5.3686 ± 0.0001 d
Inclination: 47° +15°, −13°
Time of periastron: 2454751.76 ± 0.01
Argument of periastron: 54° +13°, −14°
Semi amplitude: 12.3 ± 0.1 m/s
Star: Gliese 581
Mass: 20.5 +6.2, −3.5 M 🜨

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Article

Gliese 581b or Gl 581b is an exoplanet orbiting within the Gliese 581 system, located 20.5 light-years (6.3 parsecs) away from Earth in the Libra constellation. It is the first planet discovered of three confirmed in the system so far, and the second in order from the star.

Discovery