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Betelgeuse
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Star Betelgeuse

Binary star Betelgeuse is located 723 light years away from the Sun. It consists of a red supergiant and a blue-white star. For now, there are no known exoplanets in this star system.
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Sun distance
723 light years
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Betelgeuse

Red supergiant
Spectral class: M1–M2 Ia–ab

Location +

Ascension iconRight ascension: 5h 55m 10.305s
Declination iconDeclination: 7° 24' 25.430'' (equatorial region)
Parallax iconParallax: 4.510
Distance iconSun distance: 723.184 ly | 221.7 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: 1800 % M Sun
| 18856 M Jupiter
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Star mass
Mass of the star Betelgeuse is 18 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: 76400 % R Sun
| 7602.7 R Jupiter
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Star size
Radius of the star Betelgeuse is 764 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: 3700 K | 0.64 T Sun
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Star temperature
Surface temperature of Betelgeuse is 3700 K, which is 64 % 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: 0.01 billions years | 0 Sun
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Star age
Star Betelgeuse is 0.01 billion years old, which is about 0 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: 100000 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

Betelgeuse B

Blue-white star

Basic characteristic

icon weight
Mass: 300 % M Sun
| 3143 M Jupiter
+
Star mass
Mass of the star Betelgeuse B is 18 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: 240 % R Sun
| 23.5 R Jupiter
(estimate)
+
Star size
Radius of the star Betelgeuse B is not known. Its estimated value based on other similar stars is about 240 % 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: 7400 K | 1.28 T Sun
+
Star temperature
Surface temperature of Betelgeuse B is 7400 K, which is 128 % 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

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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Betelgeuse system structure

 Betelgeuse
Betelgeuse B

More about Betelgeuse

       Betelgeuse can be found in northern celestial hemisphere.
Other designations of this star
α Ori, 58 Ori, HR 2061, BD+7°1055, HD 39801, FK5 224, HIP 27989, SAO 113271, GC 7451
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External sources
icon study
VLT/SPHERE imaging of the candidate companion of Betelgeuse
Scientific study, Accepted: 20. 05. 2026
icon study

Frequently Asked Questions

How far is the Betelgeuse system from the Sun?

The Betelgeuse system is 723 light years or 221.7 parsecs from the Sun.

What galaxy is the Betelgeuse star in?

The Betelgeuse is in the Milky Way galaxy just like the Sun.

How many stars are in the Betelgeuse system?

The Betelgeuse system contains 2 stars.

What type of star is the Betelgeuse?

The primary in the Betelgeuse system is a Red supergiant star.

What temperature is star Betelgeuse?

The primary in the Betelgeuse system has a temperature of 3700 K. Find out more about the temperature of stars in Stellar guide
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