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Gliese 27.1
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Star Gliese 27.1

Red dwarf Gliese 27.1 is located 77 light years away from the Sun. It is a single star of spectral class M0.5V, that has 53 % of solar mass. There is at least one exoplanet in this system.
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Sun distance
77 light years
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Gliese 27.1

Red dwarf, High proper motion star
Spectral class: M0.5V

Location +

Ascension iconRight ascension: 0h 39m 59.552s
Declination iconDeclination: -44° 15' 15.115'' (southern hemisphere)
Parallax iconParallax: 42.332
Distance iconSun distance: 77.047 ly | 23.6 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: 53 % M Sun
| 555 M Jupiter
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Star mass
Mass of the star Gliese 27.1 is 0.53 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: 52 % R Sun
| 5.2 R Jupiter
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Star size
Radius of the star Gliese 27.1 is 0.52 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: 3556 K | 0.62 T Sun
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Star temperature
Surface temperature of Gliese 27.1 is 3556 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
luminosity icon
Luminosity: 0.04597 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): 11.4
Magnitude iconAbsolute magnitude (V): 9.5
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 27.1 system structure

 Gliese 27.1
Gliese 27.1 b 0.1 AU 13 M⊕ 40.7 R⊕ 15.8 days

More about Gliese 27.1

Nearby star Gliese 27.1 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 3556 K (3283 °C), which is about 62 % of Sun's temperature.
       Gliese 27.1 can be found in southern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.
Other designations of this star
Gaia DR2 4980466929964496128, GJ 27.1, HIC 3143, HIP 3143, TYC 7531-1014-1, 2MASS J00395880-4415117, CD-44 170, LHS 1122, Gliese 9018, GJ 9018, LFT 61, L 363-95, LTT 354, NLTT 2181, TIC 80417903, TYC 7531-1014-1, WISEA J003959.30-441513.9, Gaia EDR3 4980466929965023104
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External sources
simbad icon
Simbad database (CD-44 170)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 4980466929965023104)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Gliese 27.1 system from the Sun?

The Gliese 27.1 system is 77 light years or 23.6 parsecs from the Sun.

What galaxy is the Gliese 27.1 star in?

The Gliese 27.1 is in the Milky Way galaxy just like the Sun.

How many stars are in the Gliese 27.1 system?

The Gliese 27.1 is a single star, there are no other known stars in the system.

What type of star is the Gliese 27.1?

The star Gliese 27.1 is a Red dwarf star.

What temperature is star Gliese 27.1?

The star Gliese 27.1 has an effective temperature of 3556 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.
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