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Gliese 633
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Star Gliese 633

Red dwarf Gliese 633 is located 55 light years away from the Sun. It is a single star of spectral class M3 V, that has typically about 25 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
55 light years
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Gliese 633

Red dwarf, High proper motion star
Spectral class: M3 V

Location +

Ascension iconRight ascension: 16h 40m 45.805s
Declination iconDeclination: -46° 0' 5.696'' (southern hemisphere)
Parallax iconParallax: 58.966
Distance iconSun distance: 55.312 ly | 17.0 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: 30 % M Sun
| 0 M Jupiter
(estimate)
Array
radius icon
Size: 40 % R Sun
| 4 R Jupiter
(estimate)
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Star size
Radius of the star Gliese 633 is not known. Its estimated value based on other similar stars is about 40 % 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: 3425 K | 0.59 T Sun
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Star temperature
Surface temperature of Gliese 633 is 3425 K, which is 59 % 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): 12.7
Magnitude iconAbsolute magnitude (V): 11.6
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 633 system structure

 Gliese 633

More about Gliese 633

Nearby star Gliese 633 is a main sequence star that fuses hydrogen atoms into helium. It is approximately 40 % of the size of Sun and temperature on its surface is around 3425 K (3152 °C), which is about 59 % of Sun's temperature.
       Gliese 633 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
L 339-19, LHS 3233, JP11 518, LFT 1297, LPM 615, LTT 6662, NLTT 43296, 2MASS J16404524-4559590, GJ 633, Gaia EDR3 5942777301034031104
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External sources
simbad icon
Simbad database (L 339-19)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 5942777301034031104)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Gliese 633 system from the Sun?

The Gliese 633 system is 55 light years or 17.0 parsecs from the Sun.

What galaxy is the Gliese 633 star in?

The Gliese 633 is in the Milky Way galaxy just like the Sun.

How many stars are in the Gliese 633 system?

The Gliese 633 is a single star, there are no other known stars in the system.

What type of star is the Gliese 633?

The star Gliese 633 is a Red dwarf star.

What temperature is star Gliese 633?

The star Gliese 633 has an effective temperature of 3425 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

 CD-43 11010
 - 4.3 ly

UPM J1605-4947
 - 7.2 ly

Gliese 3961
 - 7.4 ly

HD 150848
 - 7.5 ly

SCR J1639-4652
 - 7.6 ly
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