Gliese 667

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Places in Fenspace
Gliese 667 A
Eso0939a.jpg
Artist’s impression of the Gliese 667 system (image courtesy ESO)
Stellar characteristics
ConstellationScorpius
Right ascension (Epoch J2000)17h 18m 57.18s
Declination (Epoch J2000)−34° 59' 23.3"
Spectral typeK3V
Distance from Sol22.74 ly
Other designationsHR 6426, Gl 667 A, Hip 84709, HD 156384, CD-34 11626 A, CP-34 6803, SAO 208670, LHS 442, LTT 6888, LFT 1336, LPM 638, UGPMF 433, MLO 4A.
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Places in Fenspace
Gliese 667 B
Stellar characteristics
ConstellationScorpius
Right ascension (Epoch J2000)17h 18m 57.18s
Declination (Epoch J2000)−34° 59' 23.3"
Spectral typeK5 V
Distance from Sol22.74 ly
Other designationsGl 667 B, MLO 4B.
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Gliese 667 (also HR 6426 and MLO 4) is a triple star system in the constellation of Scorpius. The star system lies at a distance of about 6.97 pc (22.7 ly). In addition to the three gravitationally bound stars, there is a fourth close component, but the 4th component is not bound to the system. To the naked eye, the system appears to be a single faint star of magnitude 5.89. There is a 12th magnitude star close to the other three, but it is not gravitationally bound to the system.

The two brightest components, Gl 667 A and Gl 667 B, are separated by an average distance of about 12.6 AU, but have an eccentric orbit, which takes them as close as about 5 AU, or as far as 20 AU. The orbit takes approximately 42.15 years to complete. The orbital distance translates to an average separation of 1.8".

Gliese 667 C orbits further out, between about 56 and 215 AU, equating to an angular separation of about 30". It has at least two planets, one of which is earthlike and orbiting in the star's habitable zone.

Gliese 667 A

Gliese 667 A is an orange dwarf star of spectral class K3V. The star has a lower concentration of heavy elements (metals) than the Sun. The star has a mass of around 75% of that of the Sun and a luminosity of around 12 or 13% of that of the Sun. The apparent magnitude is 6.29, giving an absolute magnitude of around 7.07.

Gliese 667 B

Gliese 667 B is an orange dwarf star of spectral class K5V, with a mass of about 65% of that of the Sun, and only about 5% of the Sun's luminosity. The apparent magnitude is 7.24, giving an absolute magnitude of around 8.02.

Gliese 667 C

See Gliese 667 C