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Alpha Comae Berenices
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Star Alpha Comae Berenices

Binary star Alpha Comae Berenices is located 58 light years away from the Sun. It consists of 2 yellow-white star stars. For now, there are no known exoplanets in this star system.
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Sun distance
58 light years
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Alpha Comae Berenices A

Yellow-White star
Spectral class: F5V

Location +

Ascension iconRight ascension: 13h 9m 59.295s
Declination iconDeclination: 17° 31' 46.039'' (equatorial region)
Parallax iconParallax: 56.100
Distance iconSun distance: 58.138 ly | 17.8 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: 123.7 % M Sun
| 1296 M Jupiter
+
Star mass
Mass of the star Alpha Comae Berenices A is 1.237 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: 140 % R Sun
| 14.2 R Jupiter
(estimate)
+
Star size
Radius of the star Alpha Comae Berenices A is not known. Its estimated value based on other similar stars is about 140 % 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: 6365 K | 1.1 T Sun
+
Star temperature
Surface temperature of Alpha Comae Berenices A is 6365 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
luminosity icon
Luminosity: 1.72 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): 4.3
Magnitude iconAbsolute magnitude (V): 3.1
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 Comae Berenices B

Yellow-White star
Spectral class: F5V

Location +

Distance iconDistance from the primary: 10 AU

Basic characteristic

icon weight
Mass: 108.7 % M Sun
| 1139 M Jupiter
+
Star mass
Mass of the star Alpha Comae Berenices B is 1.237 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: 130 % R Sun
| 12.4 R Jupiter
(estimate)
+
Star size
Radius of the star Alpha Comae Berenices B is not known. Its estimated value based on other similar stars is about 130 % 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: 6378 K | 1.1 T Sun
+
Star temperature
Surface temperature of Alpha Comae Berenices B is 6378 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
luminosity icon
Luminosity: 1.75 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): 5.5
Magnitude iconAbsolute magnitude (V): 4.3
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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Alpha Comae Berenices system structure

 Alpha Comae Berenices A
Alpha Comae Berenices B 10 AU

More about Alpha Comae Berenices

       Alpha Comae Berenices 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 114379, HR 4969, TIC 138128530, 2MASS J13095936+1731456, GJ 501.0, Gliese 501.0, alf Com, HIP 64241, WISE J130958.97+173146.5, α Com, Alpha Com, 42 Comae Berenices, 42 Com, STF 1728, ADS 8804 , BD+18 2697, CCDM J13100+1732, GC 17833, Gliese 501, IDS 13051+1803 AB, LTT 13802, NLTT 33105, PPM 129630, SAO 100443, WDS 13100+1732
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Frequently Asked Questions

How far is the Alpha Comae Berenices system from the Sun?

The Alpha Comae Berenices system is 58 light years or 17.8 parsecs from the Sun.

What galaxy is the Alpha Comae Berenices star in?

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

How many stars are in the Alpha Comae Berenices system?

The Alpha Comae Berenices system contains 2 stars.

What type of star is the Alpha Comae Berenices?

The primary in the Alpha Comae Berenices system is a Yellow-White star star.

What temperature is star Alpha Comae Berenices?

The primary in the Alpha Comae Berenices system has a temperature of 6365 K. Find out more about the temperature of stars in Stellar guide
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