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LHS 1903
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Star LHS 1903

Red dwarf LHS 1903 is located 116 light years away from the Sun. It is a single star of spectral class M0.5V, that has typically about 25 % of solar mass. There are multiple known exoplanets in this system.
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Sun distance
116 light years
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LHS 1903

Red dwarf
Spectral class: M0.5V

Location +

Ascension iconRight ascension: 7h 11m 27.798s
Declination iconDeclination: 48° 19' 40.273'' (northern hemisphere)
Parallax iconParallax: 28.053
Distance iconSun distance: 116.266 ly | 35.6 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: 60 % M Sun
| 576.2 M Jupiter
 (estimate)
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Star mass
The mass of the star LHS 1903 is unknown. Based on its other characteristics, it is estimated to be about 60 % of the Sun's mass.

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 LHS 1903 is 0.539 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: 3664 K | 0.63 T Sun
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Star temperature
Surface temperature of LHS 1903 is 3664 K, which is 63 % 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: 7.08 billions years | 1.54 Sun
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Star age
Star LHS 1903 is 7.08 billion years old, which is about 1.54 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

Photometry

Magnitude iconApparent magnitude (V): 12.2
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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LHS 1903 system structure

 LHS 1903
LHS 1903 b 0.03 AU 3.3 M⊕ 1.4 R⊕ 2.2 days
LHS 1903 c 0.05 AU 4.6 M⊕ 2 R⊕ 6.2 days
LHS 1903 d 0.09 AU 6 M⊕ 2.5 R⊕ 12.6 days
LHS 1903 e 0.15 AU 5.8 M⊕ 1.7 R⊕ 29.3 days

More about LHS 1903

Star LHS 1903 is approximately 50 % of the size of Sun and temperature on its surface is around 3664 K (3391 °C), which is about 63 % of Sun's temperature.
       LHS 1903 can be found in northern 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 978086481343568128, Gaia DR3 978086481343568128, HIP 34730, G 107-55, LSPM J0711 4819, NLTT 17491, TOI-1730, TIC 318022259, TYC 3396-1862-1, 2MASS J07112794 4819501, Gaia DR3 978086481343568128
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External sources
icon study
gaia icon
Gaia database (Gaia DR3 978086481343568128)
Archive from the Gaia mission

Frequently Asked Questions

How far is the LHS 1903 system from the Sun?

The LHS 1903 system is 116 light years or 35.6 parsecs from the Sun.

What galaxy is the LHS 1903 star in?

The LHS 1903 is in the Milky Way galaxy just like the Sun.

How many stars are in the LHS 1903 system?

The LHS 1903 is a single star, there are no other known stars in the system.

What type of star is the LHS 1903?

The star LHS 1903 is a Red dwarf star.

What temperature is star LHS 1903?

The star LHS 1903 has an effective temperature of 3664 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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