Gliese 581b information

Gliese 581 b
	Size comparison of Gliese 581 b with Neptune; (Based on selected hypothetical modeled compositions)
Discovery
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
Orbital characteristics
Semi-major axis	0.041±0.001 AU
Eccentricity	0.022+0.027; −0.005
Orbital period (sidereal)	5.368±0.001 d
Time of periastron	2454751.76 ± 0.01
Argument of periastron	118.3°+27.4°; −22.9°
Semi-amplitude	12.35+0.18; −0.20 m/s
Star	Gliese 581
Physical characteristics
Mass	≥15.20+0.22; −0.27 M🜨

Gliese 581b or Gl 581b is an exoplanet orbiting within the Gliese 581 system. It is the first planet discovered of three confirmed in the system so far, and the second in order from the star.^[4]^[5]

^ Cite error: The named reference Bonfils was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Trifonov2018 was invoked but never defined (see the help page).
^ Cite error: The named reference robertson2014 was invoked but never defined (see the help page).
^ "Gl 581 b". Extrasolar Planets Encyclopaedia. Archived from the original on 2014-02-10.
^ "If There's Life on Alien Planet Gliese 581g, How Do We Find It?". Space.com. 30 September 2010. Archived from the original on 10 July 2018. Retrieved 5 January 2014.

[Bonfils-1] Cite error: The named reference Bonfils was invoked but never defined (see the help page).

[Trifonov2018-2] Cite error: The named reference Trifonov2018 was invoked but never defined (see the help page).

[robertson2014-3] Cite error: The named reference robertson2014 was invoked but never defined (see the help page).

[4] "Gl 581 b". Extrasolar Planets Encyclopaedia. Archived from the original on 2014-02-10.

[5] "If There's Life on Alien Planet Gliese 581g, How Do We Find It?". Space.com. 30 September 2010. Archived from the original on 10 July 2018. Retrieved 5 January 2014.

Gliese 581b information

and 17 Related for: Gliese 581b information

Gliese 581b

Gliese 581

Gliese 581d

Gliese 581g

Tidal locking

Gliese 581c

Gliese 581e

Lambda Librae

HD 139139

Zeta Librae

Mu Librae

List of exoplanets detected by radial velocity

Tau Librae

Upsilon Librae

Epsilon Librae

Kappa Librae

List of exoplanets discovered in 2016

Discovery^[1]
Size comparison of Gliese 581 b with Neptune (Based on selected hypothetical modeled compositions)
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
Orbital characteristics^[2]
Semi-major axis	0.041±0.001 AU
Eccentricity	0.022+0.027 −0.005
Orbital period (sidereal)	5.368±0.001 d
Time of periastron	2454751.76 ± 0.01^[3]
Argument of periastron	118.3°+27.4° −22.9°
Semi-amplitude	12.35+0.18 −0.20 m/s
Star	Gliese 581
Physical characteristics^[2]
Mass	≥15.20+0.22 −0.27 M_🜨