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Gliese 239
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Star Gliese 239

Red dwarf Gliese 239 is located 33 light years away from the Sun. It is a single star of spectral class M0 Ve, that has 44 % of solar mass. There are multiple known exoplanets in this system.
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Sun distance
33 light years
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Gliese 239

Red dwarf, High proper motion star
Spectral class: M0 Ve

Location +

Ascension iconRight ascension: 6h 37m 9.945s
Declination iconDeclination: 17° 33' 58.739'' (equatorial region)
Parallax iconParallax: 100.023
Distance iconSun distance: 32.608 ly | 10.0 pc
Star position
The position of a star tells us where it appears in the sky, similar to how we use coordinates like latitude and longitude on Earth. In astronomy, the three main coordinates are right ascension, declination and distance. .. icon More about Star position in StellarGuide

Basic characteristic

icon weight
Mass: 43.9 % M Sun
| 460 M Jupiter
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Star mass
Mass of the star Gliese 239 is 0.439 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: 47 % R Sun
| 4.7 R Jupiter
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Star size
Radius of the star Gliese 239 is 0.47 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: 3807 K | 0.66 T Sun
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Star temperature
Surface temperature of Gliese 239 is 3807 K, which is 66 % 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
luminosity icon
Luminosity: 0.046 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): 9.6
Magnitude iconAbsolute magnitude (V): 9.6
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
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Gliese 239 system structure

 Gliese 239
Gliese 239 b 0.03 AU 2.1 M⊕ 1.2 R⊕ 2.8 days
Gliese 239 c 0.05 AU 3.1 M⊕ 1.5 R⊕ 5.7 days

More about Gliese 239

Nearby star Gliese 239 is a main sequence star that fuses hydrogen atoms into helium. It is approximately 50 % of the size of Sun and temperature on its surface is around 3807 K (3534 °C), which is about 66 % of Sun's temperature.
       Gliese 239 can be found in northern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope. The star is easily observable from Northern America, Europe and Asia.
Other designations of this star
LHS 1858, BD+17 1320, G 110-5, G 104-49, HD 260655, HIC 31635, HIP 31635, JP11 53, LFT 477, LTT 11880, NLTT 16743, 2MASS J06371092+1733526, Wolf 287, TOI-4599, Gaia EDR3 3359074685047632640
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External sources
icon study
simbad icon
Simbad database (HD 260655)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 3359074685047632640)
Archive from the Gaia mission
tess icon
TESS database (TOI 4599.01)
Archive from the TESS mission

Frequently Asked Questions

How far is the Gliese 239 system from the Sun?

The Gliese 239 system is 33 light years or 10.0 parsecs from the Sun.

What galaxy is the Gliese 239 star in?

The Gliese 239 is in the Milky Way galaxy just like the Sun.

How many stars are in the Gliese 239 system?

The Gliese 239 is a single star, there are no other known stars in the system.

What type of star is the Gliese 239?

The star Gliese 239 is a Red dwarf star.

What temperature is star Gliese 239?

The star Gliese 239 has an effective temperature of 3807 K. Find out more about the temperature of stars in Stellar guide
Class of stars Red dwarf
Red dwarfs are small, cool stars with surface temperatures of about 2,000–3,800 K, much cooler than the Sun. They usually have 8–50% of the Sun’s mass and shine very faintly, sometimes at just a tiny fraction of the Sun’s brightness. Classified mainly as spectral type M, they are the most common stars in the Milky Way, making up roughly 70–75% of its stellar population.

They fuse hydrogen slowly through the proton–proton chain and are fully convective, which allows them to use their fuel very efficiently. As a result, red dwarfs can live for tens of billions to trillions of years—far longer than the Sun. Many exoplanets orbit red dwarfs, including some in close habitable zones, though strong stellar activity can affect planetary environments.
Closest stars

 Gliese 232
 0 M☉ 6 ly

Gliese 228
 - 6.5 ly

Chi1 Orionis
 1 M☉ 7 ly

2MASS 0727+1710
 0.04 M☉ 7.1 ly

Gliese 1093
 0.21 M☉ 7.8 ly
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