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Gliese 84
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Star Gliese 84

Red dwarf Gliese 84 is located 30 light years away from the Sun. It is suspected double or multiple star of spectral class M2.5 V, that has 40 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
30 light years
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Gliese 84

Red dwarf, Spectroscopic binary
Spectral class: M2.5 V

Location +

Ascension iconRight ascension: 2h 5m 6.307s
Declination iconDeclination: -17° 36' 55.451'' (equatorial region)
Parallax iconParallax: 107.297
Distance iconSun distance: 30.397 ly | 9.3 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: 40 % M Sun
| 419 M Jupiter
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Star mass
Mass of the star Gliese 84 is 0.4 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: 54 % R Sun
| 5.4 R Jupiter
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Star size
Radius of the star Gliese 84 is 0.54 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: 3534 K | 0.61 T Sun
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Star temperature
Surface temperature of Gliese 84 is 3534 K, which is 61 % 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

Photometry

Magnitude iconApparent magnitude (V): 10.2
Magnitude iconAbsolute magnitude (V): 10.3
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 84 system structure

 Gliese 84

More about Gliese 84

Nearby star Gliese 84 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 3534 K (3261 °C), which is about 61 % of Sun's temperature.
       Gliese 84 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.
Other designations of this star
HIP 9724, LHS 149, LTT 1092, G 272-148, BD-18 359, Gaia EDR3 5138510181584617856
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External sources
simbad icon
Simbad database (BD-18 359)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 5138510181584617856)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Gliese 84 system from the Sun?

The Gliese 84 system is 30 light years or 9.3 parsecs from the Sun.

What galaxy is the Gliese 84 star in?

The Gliese 84 is in the Milky Way galaxy just like the Sun.

How many stars are in the Gliese 84 system?

The Gliese 84 is a single star, there are no other known stars in the system.

What type of star is the Gliese 84?

The star Gliese 84 is a Red dwarf star.

What temperature is star Gliese 84?

The star Gliese 84 has an effective temperature of 3534 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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