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Gliese 667 C
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Star Gliese 667 C

Red dwarf Gliese 667 C is located 24 light years away from the Sun. It is a single flare star of spectral class M1.5V, that has 33 % of solar mass. There are multiple known exoplanets in this system.
Sun distance
24 light years
galaxy map

Gliese 667 C

Red dwarf, flare star, High proper motion star
Spectral class: M1.5V

Location +

Distance iconDistance from the primary: 230 AU

Basic characteristic

icon weight
Mass: 33 % M Sun
| 346 M Jupiter
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Star mass
Mass of the star Gliese 667 C is 0.33 solar masses.

The mass of a star is the total amount of matter it contains. It is one of the most important properties of a star, as it determines almost everything about how the star lives, changes, and dies. In astronomy, star mass is usually measured in solar masses (M☉) — where 1 solar mass is equal to the mass of our Sun... icon More about Star mass in StellarGuide
radius icon
Size: 42 % R Sun
| 4.2 R Jupiter
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Star size
Radius of the star Gliese 667 C is 0.42 solar radii.

The size of a star refers to its radius — the distance from its center to its surface. Star size is usually measured in solar radii (R☉), where 1 solar radius equals approximately 696,000 kilometers. Depending on their type and life stage, stars can be much smaller or larger than the Sun... icon More about Star size in StellarGuide
temperature icon
Temperature: 3600 K | 0.62 T Sun
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Star temperature
Surface temperature of Gliese 667 C is 3600 K, which is 62 % of the temperature on the surface of the Sun.

The temperature of a star refers to the temperature at its surface, also called the photosphere. It is measured in kelvins (K), the standard unit for temperature in astronomy. A star’s temperature tells us a lot about its physical properties and where it stands in its evolutionary stage... icon More about Star temperature in StellarGuide
time icon
Age: 6 billions years | 1.3 Sun
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Star age
Star Gliese 667 C is 6 billion years old, which is about 1.3 of the Sun's age.

The age of a star tells us how long it has been shining since it formed. Knowing a star’s age helps astronomers understand its life stage, how it has changed over time, and what will happen to it in the future... icon More about Star age in StellarGuide
luminosity icon
Luminosity: 0.01863 L Sun
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Star luminosity
Luminosity is the total amount of energy a star gives off every second. Think of it as the star’s true brightness — not just how bright it looks from Earth. This is important because some stars may appear dim simply because they are far away, not because they’re actually faint... icon More about Star luminosity in StellarGuide

Photometry

Magnitude iconApparent magnitude (V): 10.2
Magnitude iconAbsolute magnitude (V): 10.9
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
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

Gliese 667 C system structure

 Gliese 667 A
Gliese 667 B
Gliese 667 C 230 AU
Gliese 667 C b 0.05 AU 5.7 M⊕ -
Gliese 667 C c 0.13 AU 3.7 M⊕ 1.5 R⊕ -
Gliese 667 C f 0.16 AU (HZ) 2.7 M⊕ 39 days
Gliese 667 C e 0.21 AU 2.7 M⊕ 62.2 days
Gliese 667 C g 0.55 AU 4.6 M⊕ 256.2 days
More about Gliese 667 C
Gliese 667 C is approximately 40 % of the size of Sun and temperature on its surface is around 3600 K (3327 °C), which is about 62 % of Sun's temperature.
       Gliese 667 C 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.
External sources
icon study
Three Hot Jupiters transiting K-dwarfs with a significant heavy element mass
Scientific study, Accepted: 05. 06. 2025
icon study
Searching for helium escape and a low density atmosphere around the 120 Myr old sub-Neptune HIP94235b using CRIRES+
Scientific study, Accepted: 04. 06. 2025
icon study
The Age and High Energy Environment of the Very Young Transiting Exoplanet TOI 1227b
Scientific study, Accepted: 04. 06. 2025
icon study
NLTE atmospheric modelling of the ultra-hot Jupiter WASP-178b and comparison with UV and optical observations
Scientific study, Accepted: 03. 06. 2025
simbad icon
Simbad database (HD 156384C)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
Class of stars Red dwarf
Red dwarfs are small, relatively cool, reddish stars. They are by far the most common type of star in the solar neighborhood. Their mass typically ranges from about 8% to 50% of the Sun's mass.
News from this star system
calendar icon20. 03 2023
tag iconStars
Article image:

Astronomers have discovered a brown dwarf orbiting the red giant HD 18438

Astronomers led by Byeong-Cheol Lee have made a groundbreaking discovery, detecting a brown dwarf orbiting the red giant HD 18438. With a radius of 89 times that of the Sun, HD 18438 is now the largest known star to be orbited by an exoplanet or brown dwarf.

Read more
calendar icon09. 03 2023
tag iconExoplanets
Article image:

Newly discovered exoplanet HD 207496 b is too close to its star and is loosing atmosphere

Read more
calendar icon03. 03 2023
tag iconExoplanets
Article image:

Two giant exoplanets discovered orbiting nearby Sun-like star HIP 104045

Astronomers discovered two new exoplanets orbiting a star HIP 104045. The star is 175 light years away and its mass and size are similar to the Sun. Both exoplanets are gas giants, smaller than Jupiter.

Read more
calendar icon08. 02 2023
tag iconBrown dwarfs
Article image:

Astronomers used JWST and TESS telescopes to study nearby brown dwarf HD 19467 B

Brown dwarfs are objects between planets and stars. Astronomers divide them into 3 categories according to their temperature - L, T, Y. Their relatively low temperatures and brightness allow them to stay hidden for most part. Only the most powerful infrared telescopes are able to see them and that is where James Webb Space Telescope comes in.

Read more

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