Gliese 667

Starbox begin
name=Gliese 667 A/B/C Starbox observe
epoch=J2000
constell=Scorpius
ra=17h 18m 57.18s
dec=−34° 59' 23.3"
appmag_v=6.29/7.24/10.25 Starbox character
class=K3V / K5V / M2V
b-v=1.03/???/1.57
u-b=0.83/???/1.17
variable=A: suspected
B: unknown
C: flare star Starbox astrometry
radial_v=0
prop_mo_ra=1149.24
prop_mo_dec=-90.80
parallax=143.45
p_error=17.12
absmag_v=7.07/8.02/11.03 Starbox detail
mass=0.75/0.65/0.38
radius=0.77/0.44/0.20
luminosity=0.13/0.05/0.003 | temperature=3950
metal=26% Sun
rotation=
age= Starbox visbin
name=Gliese 667 AB
period=42.15
axis=1.81
eccentricity=0.58
inclination=128
node=313
periastron=1975.9 Starbox catalog
names=HD 156384, HR 6426, CD−34°11626, SAO 208670, HIP 84709, LHS 442/442/443, MLO 4

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 system has a relatively high proper motion, exceeding 1 second of arc per year.

Planetary 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".

Gl 667 C orbits further out, between about 56 and 215 AU, equating to an angular separation of about 30".

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

Gliese 667 C is a red dwarf star of spectral class of M2V. It has a mass of around 38% of that of the Sun and only 0.3% of the Sun's luminosity. The apparent magnitude is 10.25, giving an absolute magnitude of around 11.03.

External links

* cite web
title=MLO 4 | work=SolStation
url=http://www.solstation.com/stars/mlo4abc.htm
accessdate=July 9
accessyear=2006