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Procyon
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Star Procyon

Binary star Procyon is located 11 light years away from the Sun. It consists of a subgiant and a white dwarf. For now, there are no known exoplanets in this star system.
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Sun distance
11 light years
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Procyon A

Subgiant, Spectroscopic binary
Spectral class: F5IV

Location +

Ascension iconRight ascension: 7h 39m 18.120s
Declination iconDeclination: 5° 13' 29.955'' (equatorial region)
Parallax iconParallax: 284.560
Distance iconSun distance: 11.460 ly | 3.5 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: 150 % M Sun
| 1571 M Jupiter
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Star mass
Mass of the star Procyon A is 1.5 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: 205 % R Sun
| 20.4 R Jupiter
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Star size
Radius of the star Procyon A is 2.048 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: 6474 K | 1.12 T Sun
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Star temperature
Surface temperature of Procyon A is 6474 K, which is 112 % 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: 1.87 billions years | 0.41 Sun
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Star age
Star Procyon A is 1.87 billion years old, which is about 0.41 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: 6.93 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

Photometry

Magnitude iconApparent magnitude (V): 0.4
Magnitude iconAbsolute magnitude (V): 2.7
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

Procyon B

White dwarf, , Spectroscopic binary
Spectral class: DQZ D

Location +

Distance iconDistance from the primary: 4.3075 AU

Basic characteristic

icon weight
Mass: 60.2 % M Sun
| 631 M Jupiter
+
Star mass
Mass of the star Procyon B is 1.5 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: 1.2 % R Sun
| 0.1 R Jupiter
+
Star size
Radius of the star Procyon B is 0.01234 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
time icon
Age: 1.37 billions years | 0.3 Sun
+
Star age
Star Procyon B is 1.37 billion years old, which is about 0.3 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: 0.00049 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): 10.9
Magnitude iconAbsolute magnitude (V): 13.2
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
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Procyon system structure

 Procyon A
Procyon B 4.3075 AU

More about Procyon

       Procyon 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
Elgomaisa, Algomeysa, Antecanis, α Canis Minoris, Alpha Canis Minoris, 10 Canis Minoris, BD+05°1739, Gliese 280, GJ 280, HD 37279, HIC 30438, HIP 30438, HR 2943, SAO 115756, LHS 233, alf CMi
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External sources
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Frequently Asked Questions

How far is the Procyon system from the Sun?

The Procyon system is 11 light years or 3.5 parsecs from the Sun.

What galaxy is the Procyon star in?

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

How many stars are in the Procyon system?

The Procyon system contains 2 stars.

What type of star is the Procyon?

The primary in the Procyon system is a Subgiant star.

What temperature is star Procyon?

The primary in the Procyon system has a temperature of 6474 K. Find out more about the temperature of stars in Stellar guide
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