Astronomical data · SIMBAD
- Object type
- Pl
- Distance
- 21 light-years
- Coordinates
- RA 229.8618° · Dec -7.7223°
View on SIMBAD →
via SIMBAD · CDS Strasbourg
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 🜨
via Wikipedia infobox
~2 min read
Encyclopedic overview
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
Excerpted from Wikipedia’s “Gliese 581 b” article, available under the CC BY-SA 4.0 licence.