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Mu1 Cygni
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Star Mu1 Cygni

Binary star Mu1 Cygni is located 72 light years away from the Sun. It consists of a yellow-white star and a yellow star. For now, there are no known exoplanets in this star system.
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Sun distance
72 light years
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Mu1 Cygni

Yellow-White star
Spectral class: F6V+F3V

Location +

Ascension iconRight ascension: 21h 44m 8.892s
Declination iconDeclination: 28° 44' 29.633'' (northern hemisphere)
Parallax iconParallax: 45.156
Distance iconSun distance: 72.229 ly | 22.1 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: 131 % M Sun
| 1372 M Jupiter
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Star mass
Mass of the star Mu1 Cygni is 1.31 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: 188 % R Sun
| 18.7 R Jupiter
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Star size
Radius of the star Mu1 Cygni is 1.88 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: 6354 K | 1.1 T Sun
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Star temperature
Surface temperature of Mu1 Cygni is 6354 K, which is 110 % 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: 3.46 billions years | 0.75 Sun
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Star age
Star Mu1 Cygni is 3.46 billion years old, which is about 0.75 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: 6 L Sun
+
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): 4.5
Magnitude iconAbsolute magnitude (V): 2.8
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

Mu2 Cygni

Yellow star
Spectral class: G2V

Basic characteristic

icon weight
Mass: 99 % M Sun
| 1037 M Jupiter
+
Star mass
Mass of the star Mu2 Cygni is 1.31 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: 108 % R Sun
| 10.7 R Jupiter
+
Star size
Radius of the star Mu2 Cygni is 1.08 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: 5.998 K | 0 T Sun
+
Star temperature
Surface temperature of Mu2 Cygni is 5.998 K, which is 0 % 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
luminosity icon
Luminosity: 1.4 L Sun
+
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

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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Mu1 Cygni system structure

 Mu1 Cygni
Mu2 Cygni

More about Mu1 Cygni

       Mu1 Cygni 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
HD 206827, HR 8310, SAO 89939, 78 Cyg, BD+28°4169, HIP 107310, CCDM J21442+2845AB, WDS J21441+2845AB, HD 206826, HR 8309, SAO 89940, Gaia EDR3 1801210568415251072
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Frequently Asked Questions

How far is the Mu1 Cygni system from the Sun?

The Mu1 Cygni system is 72 light years or 22.1 parsecs from the Sun.

What galaxy is the Mu1 Cygni star in?

The Mu1 Cygni is in the Milky Way galaxy just like the Sun.

How many stars are in the Mu1 Cygni system?

The Mu1 Cygni system contains 2 stars.

What type of star is the Mu1 Cygni?

The primary in the Mu1 Cygni system is a Yellow-White star star.

What temperature is star Mu1 Cygni?

The primary in the Mu1 Cygni system has a temperature of 6354 K. Find out more about the temperature of stars in Stellar guide
Closest stars

 G 188-14
 - 4.4 ly

LP 341-25
 - 7 ly

HD 208313
 - 7.7 ly

LP 397-34
 - 7.9 ly

G 188-19
 - 8.6 ly
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