do not follow here
Stellar Catalog more icon Nearby stars catalogue more icon
Alpha Trianguli
more icon

Star Alpha Trianguli

Binary star Alpha Trianguli is located 63 light years away from the Sun. It consists of a yellow giant and a red dwarf. For now, there are no known exoplanets in this star system.
Loading 3D model
Nearby stars catalogue
Sun distance
63 light years
galaxy map

Alpha Trianguli A

Yellow giant, Spectroscopic binary
Spectral class: F5III

Location +

Ascension iconRight ascension: 1h 53m 4.908s
Declination iconDeclination: 29° 34' 43.780'' (northern hemisphere)
Parallax iconParallax: 51.500
Distance iconSun distance: 63.331 ly | 19.4 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: 170 % M Sun
| 1781 M Jupiter
+
Star mass
Mass of the star Alpha Trianguli A is 1.70 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: 322 % R Sun
| 32 R Jupiter
+
Star size
Radius of the star Alpha Trianguli A is 3.22 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: 6288 K | 1.09 T Sun
+
Star temperature
Surface temperature of Alpha Trianguli A is 6288 K, which is 109 % 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: 1.6 billions years | 0.35 Sun
+
Star age
Star Alpha Trianguli A is 1.6 billion years old, which is about 0.35 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): 3.4
Magnitude iconAbsolute magnitude (V): 2
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

Alpha Trianguli B

Red dwarf, , Spectroscopic binary

Basic characteristic

icon weight
Mass: 11 % M Sun
| 115 M Jupiter
+
Star mass
Mass of the star Alpha Trianguli B is 1.70 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
temperature iconTemperature: 6300 K
 (estimate)
+
Star temperature
Surface temperature of Alpha Trianguli B is estimated to be 6288 K, which is 109 % 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 iconAbsolute magnitude (V): -1.4
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
Advertisement

Alpha Trianguli system structure

 Alpha Trianguli A
Alpha Trianguli B

More about Alpha Trianguli

       Alpha Trianguli can be found in northern celestial hemisphere, and it is possible to see it with naked eye. The star is easily observable from Northern America, Europe and Asia.
Other designations of this star
Mothallah, Ras al Muthallah, Caput Trianguli, α Trianguli,[11] 2 Trianguli, HR 544, HD 11443, BD+28°312, FK5 64, HIP 8796, SAO 74996
Advertisement

Frequently Asked Questions

How far is the Alpha Trianguli system from the Sun?

The Alpha Trianguli system is 63 light years or 19.4 parsecs from the Sun.

What galaxy is the Alpha Trianguli star in?

The Alpha Trianguli is in the Milky Way galaxy just like the Sun.

How many stars are in the Alpha Trianguli system?

The Alpha Trianguli system contains 2 stars.

What type of star is the Alpha Trianguli?

The primary in the Alpha Trianguli system is a Yellow giant star.

What temperature is star Alpha Trianguli?

The primary in the Alpha Trianguli system has a temperature of 6288 K. Find out more about the temperature of stars in Stellar guide
Closest stars

 2MASS J01530103+2937044
 - 1.4 ly

LSPM J0140+2701
 - 4.4 ly

2MASS J02062493+2640237
 - 4.6 ly

LP 297-12
 - 6.8 ly

Alpha Arietis
 1.5 M☉ 8.1 ly
3D map of stellar neighborhood
List of all nearby stars
Advertisement

exoplanet iconAbout Stellar Catalog

line
Working with real data
icon 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.
Estimated values
icon 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.
Fresh and validated
icon Stellar Catalog is continuously updated with new information from research papers. Stellar and planetary data are validated by automatic processes as well as humans.
Get your next news from nearby stars
Stellar Catalog brings the stars from our galaxy to you. Discover their position, physical properties and whether there are any exoplanets or disks orbiting them. The data in Stellar Catalog come from respectable sources like Gaia space telescope, or SIMBAD database.
Visit Stellar catalog on Facebook
Visit profile on X

Advertisement