Star Alpha Trianguli B
Red dwarf Alpha Trianguli B is located 63 light years away from the Sun.
It is a single star, that has 11 % of solar mass.
For now, there are no known exoplanets in this star system.
Frequently Asked Questions
How far is the Alpha Trianguli B system from the Sun?
The Alpha Trianguli B system is 63 light years or 19.4 parsecs from the Sun.
What galaxy is the Alpha Trianguli B star in?
The Alpha Trianguli B is in the Milky Way galaxy just like the Sun.
How many stars are in the Alpha Trianguli B system?
The Alpha Trianguli B is a single star, there are no other known stars in the system.
What type of star is the Alpha Trianguli B?
The star Alpha Trianguli B is a Red dwarf star.
What temperature is the Alpha Trianguli B?
The primary in the Alpha Trianguli B system has an effective temperature of K ( °C). 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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Data in Stellar Catalog come from trusted scientific sources. Primary source is Gaia space telescope mapping the stars in Milky Way. Other sources include research papers, Simbad catalog and Exoplanet.eu database.
Objects listed in the Stellar Catalog often have values that are estimates. These estimates are determined using their known characteristics, such as spectral type, brightness across different wavelengths, distance from a star, and other factors.
Stellar Catalog is continuously updated with new information from research papers. Stellar and planetary data are validated by automatic processes as well as humans.