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
Wikidata facts
- Instance of
- star
- Constellation
- Libra
- Parent body
- Gliese 581
- Mass
- 0.0645
- Orbital period
- 5.368
- Image
- Planet Gliese 581 b.png
Show 18 more facts
- epoch
- J2000.0
- discovery method
- Doppler spectroscopy
- time of discovery or invention
- 2005-12-00
- angular distance
- 0.006602
- Commons category
- Gliese 581 b
- catalog code
- TIC 36853511b
- apparent magnitude
- 10.55
- discoverer or inventor
- High Accuracy Radial Velocity Planet Searcher
- right ascension
- 229.86177972340250
- declination
- -7.72227526632666
- argument of periapsis
- 118.3
- semi-major axis of an orbit
- 0.041
- M sin i
- 0.04782
- orbital eccentricity
- 0.02
- parallax
- 158.7492
- right ascension component of proper motion
- -1221.467
- declination component of proper motion
- -97.129
- orbital inclination
- 47
Sources (2)
via Wikidata · CC0
~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.