GJ 581 b · Asteria Star

Scientific overview

GJ 581 b is a mini-neptune orbiting GJ 581, completing an orbit every 5 days, about 21 light-years from Earth. It was discovered in 2005 using the radial velocity method.

Host star

Gliese 581

Spectral type

M3.0 V

Temperature

3,500 K

Mass

0.295 M☉

Planetary system — GJ 581 system

View the GJ 581 system (3 known planets).

Planet	Class	Radius (R⊕)	Period (d)	Distance (ly)
GJ 581 eRadial Velocity · 2009	Terrestrial planet	1.38	3.1481	21
GJ 581 bRadial Velocity · 2005	Mini-Neptune	4.79	5.3686	21
GJ 581 cRadial Velocity · 2007	Mini-Neptune	2.5	12.9211	21

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2005

Discovered at

La Silla Observatory

Knowledge connections

OrbitsGliese 581
Member of systemGJ 581 system
Discovered by methodRadial Velocity Method
Discovered atLa Silla Observatory
Catalogued inNASA Exoplanet Archive

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