Gliese 581

Type: Red dwarf
Spectral class: M3.5
Age: 4.3 - 8.0 Gyr
Metallicity [Fe/H]: -0.33 (± 0.12)

Central component of the Gl 581 system with planetary companions. Similar to Gliese 876, Gliese 581 is a red dwarf.

The star is one of the least active in the region, significantly less active than Gl 674. It has proportionally smaller spots, and alonger rotational period.