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Luytens Star
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Star Luytens Star

Red dwarf Luytens Star is located 12 light years away from the Sun. It is a single star of spectral class M3.5 V, that has 26 % of solar mass. There are multiple known exoplanets in this system.
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Sun distance
12 light years
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Luytens Star

Red dwarf, High proper motion star
Spectral class: M3.5 V

Location +

Ascension iconRight ascension: 7h 27m 25.115s
Declination iconDeclination: 5° 12' 33.778'' (equatorial region)
Parallax iconParallax: 264.127
Distance iconSun distance: 12.348 ly | 3.8 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: 26 % M Sun
| 272 M Jupiter
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Star mass
Mass of the star Luytens Star is 0.26 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: 35 % R Sun
| 3.5 R Jupiter
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Star size
Radius of the star Luytens Star is 0.35 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: 3277 K | 0.57 T Sun
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Star temperature
Surface temperature of Luytens Star is 3277 K, which is 57 % 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: 8.5 billions years | 1.85 Sun
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Star age
Star Luytens Star is 8.5 billion years old, which is about 1.85 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: 0.003 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): 9.9
Magnitude iconAbsolute magnitude (V): 12
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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Luytens Star system structure

 Luytens Star
Luytens Star c 0.04 AU 1.2 M⊕ 4.7 days
Luytens Star b 0.09 AU (HZ) 2.2 M⊕ 1.4 R⊕ 18.7 days
Luytens Star d 0.71 AU 10.8 M⊕ 413.9 days
Luytens Star e 0.85 AU 9.3 M⊕ 542 days

More about Luytens Star

Nearby star Luytens Star 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 3277 K (3004 °C), which is about 57 % of Sun's temperature.
       Luytens Star 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
Gliese 273, GJ 273, GCTP1755, BD +05°1668, G 089-019, LHS 33, LTT 12021, LFT 527, Vys 17, HIC 36208, HIP 36208, Gaia EDR3 3139847906307949696
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External sources
simbad icon
Simbad database (BD+05 1668)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 3139847906307949696)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Luytens Star system from the Sun?

The Luytens Star system is 12 light years or 3.8 parsecs from the Sun.

What galaxy is the Luytens Star star in?

The Luytens Star is in the Milky Way galaxy just like the Sun.

How many stars are in the Luytens Star system?

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

What type of star is the Luytens Star?

The star Luytens Star is a Red dwarf star.

What temperature is star Luytens Star?

The star Luytens Star has an effective temperature of 3277 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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