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Gliese 581
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Star Gliese 581

Red dwarf Gliese 581 is located 21 light years away from the Sun. It is a single star of spectral class M3 V, that has 31 % of solar mass. There are multiple known exoplanets in this system.
Sun distance
21 light years
galaxy map

Gliese 581

Red dwarf, BY Draconis variable
Spectral class: M3 V

Location

Ascension iconRight ascension: 15h 19m 25.516s
Declination iconDeclination: -7° 43' 21.745'' (equatorial region)
Parallax iconParallax: 158.718
Distance iconSun distance: 20.549 ly | 6.3 pc

Basic characteristic

icon weight
Mass: 31 % M Sun | 325 M Jupiter
radius icon
Size: 30 % R Sun | 3 R Jupiter
temperature iconTemperature: 3209 K | 0.56 T Sun
time iconAge: 8 billions years | 1.74 Sun
luminosity iconLuminosity: 0.002 L Sun

Photometry

Magnitude iconApparent magnitude (V): 10.6
Magnitude iconAbsolute magnitude (V): 11.6
5
10
15
20
25
30
35
K
2.1
H
1.6
J
1.2
Grp
0.8
I
0.8
G
0.6
V
0.5
Gbp
0.5
B
0.4
U
0.3
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).

Gliese 581 system structure

Gliese 581
 Gliese 581 e 0.03 AU 1.8 M⊕ 3.1 days
Gliese 581 b 0.04 AU 15.3 M⊕ 5.4 days
Gliese 581 c 0.07 AU 5 M⊕ 12.9 days
Gliese 581 g
disproven
 0.13 AU 2.2 M⊕ -
Gliese 581 d
disproven
 0.22 AU 7 M⊕ -
Gliese 581 f
disproven
 50 AU -
More about Gliese 581
Nearby star Gliese 581 is a main sequence star that fuses hydrogen atoms into helium. It is approximately 30 % of the size of Sun and temperature on its surface is around 3209 K (2936 °C), which is about 56 % of Sun's temperature.
      a BY Draconis variable. Stars from this category exhibit periodic variations in their luminosity. The variability is caused by a rotation which shows and hides starspots on the surface. Gliese 581 can be found in southern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope. The star is also observable from Northern America, Europe and Asia. 

      Gliese 581 is a BY Draconis variable. Stars from this category exhibit periodic variations in their luminosity. The variability is caused by a rotation which shows and hides starspots on the surface.
Other designations of this star
Wolf 562, HO Librae, HO Lib, BD−07°4003, GJ 581, HIP 74995, LFT 1195, LHS 394, LPM 564, LTT 6112, NLTT 39886, TYC 5594-1093-1, BD-07 4003, Gaia EDR3 6322070093095493504
External sources
icon study
The CARMENES search for exoplanets around M dwarfs. Revisiting the GJ 581 multi-planetary system with new Doppler measurements from CARMENES, HARPS, and HIRES
Scientific study, Accepted: 16. 07. 2024
simbad icon
Simbad database (BD-07 4003)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 6322070093095493504)
Archive from the Gaia mission
Class of stars Red dwarf
Red dwarfs are small reddish stars, that are by far the most common type of star in solar neighborhood. Their mass is usually between 10 and 50 % of solar mass.
Closest stars

 Gliese 555
 0.29 M☉ 4.3 ly

2MASS J1507-1627
 0.07 M☉ 5.1 ly

33 G. Librae
 0.8 M☉ 5.3 ly

WISE 1541-2250
 0.01 M☉ 5.7 ly

Gliese 3877
 0.08 M☉ 8.3 ly
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