Gliese 667 C
Star
Gliese 667 C - a red dwarf 23.6 light-years away in Scorpius, the smallest member of a triple star system (it orbits a close pair of orange dwarfs about 230 AU away). It hosts two confirmed planets, including a super-Earth in its temperate zone; several further claimed planets remain disputed and are not shown.
Open in 3D viewSee Gliese 667 C in the live, interactive 3D map
Key facts
Mass
6.56 × 10²⁹ kg
0.33 M☉
Radius
292,194 km
42% of the Sun's radius
Surface temperature
3,350 K (3,077 °C)
Luminosity
5.24 × 10²⁴ W
Spectral type
M1.5V (red dwarf)
Science
Physical
- Mass
- 6.56 × 10²⁹ kg · 0.33 M☉
- Radius
- 292,194 km · 42% of the Sun's radius
- Density
- 6,281 kg/m³ · 6.3× water
- Computed from mass and radius
- Spectral type
- M1.5V (red dwarf)
Motion through space
- Proper motion
- 1.15 arcseconds per year · its drift across our sky
- SIMBAD — 2020yCat.1350....0G, 2018A&A...616A...7S
- Radial velocity
- +6.4 km/s · moving away from the Sun
- SIMBAD — 2020yCat.1350....0G, 2018A&A...616A...7S
- Speed across our line of sight
- 39.5 km/s
- Computed from proper motion and parallax
- Speed through space, relative to the Sun
- 40.1 km/s
- Computed from proper motion, parallax and radial velocity
Composition
- By mass
- A metal-poor red dwarf about 33% of the Sun's mass; the faint third star of the GJ 667 triple.
Temperature
- Surface
- 3,350 K (3,077 °C)
Radiation & temperature
- Luminosity
- 5.24 × 10²⁴ W · 0.0137 L☉
- Surface temperature
- 3,350 K (3,077 °C)
- Peak wavelength
- 865 nm · near-infrared (mostly invisible to the eye)
- Computed (Wien's law) from the surface temperature
Discovery & history
- Method
- Telescope
- Name
- 'Gliese 667 C' is the third (faintest) component of the GJ 667 triple star system in Scorpius.
The bright pair GJ 667 AB has been known for centuries; the faint red companion C was found to host planets by ESO's HARPS from 2011. Claims of up to seven planets (2013) were pared back - only two survive robust scrutiny.
Images
Images from open archives · credit shown per image