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Sigma Coronae Borealis
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Star Sigma Coronae Borealis

Multiple star system Sigma Coronae Borealis is located 74 light years away from the Sun. It is a system with 5 stars. For now, there are no known exoplanets in this star system.
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Sun distance
74 light years
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Sigma Coronae Borealis A

Yellow-White star, Spectroscopic binary
Spectral class: F6V

Location +

Ascension iconRight ascension: 16h 14m 40.515s
Declination iconDeclination: 33° 51' 29.615'' (northern hemisphere)
Parallax iconParallax: 44.057
Distance iconSun distance: 74.030 ly | 22.7 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: 100 % M Sun
| 1048 M Jupiter
+
Star mass
Mass of the star Sigma Coronae Borealis A is 1 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: 120 % R Sun
| 11.7 R Jupiter
(estimate)
+
Star size
Radius of the star Sigma Coronae Borealis A is not known. Its estimated value based on other similar stars is about 120 % 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: 5950 K | 1.03 T Sun
+
Star temperature
Surface temperature of Sigma Coronae Borealis A is 5950 K, which is 103 % 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 iconApparent magnitude (V): 5.6
Magnitude iconAbsolute magnitude (V): 3.8
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

Sigma Coronae Borealis Ba

Yellow star, High proper motion star
Spectral class: G1V

Basic characteristic

icon weight
Mass: 113.7 % M Sun
| 1191 M Jupiter
+
Star mass
Mass of the star Sigma Coronae Borealis Ba is 1 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: 124 % R Sun
| 12.4 R Jupiter
+
Star size
Radius of the star Sigma Coronae Borealis Ba is 1.244 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: 6050 K | 1.05 T Sun
+
Star temperature
Surface temperature of Sigma Coronae Borealis Ba is 6050 K, which is 105 % 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

Sigma Coronae Borealis Bb

Yellow star, , High proper motion star

Basic characteristic

icon weight
Mass: 109 % M Sun
| 1142 M Jupiter
+
Star mass
Mass of the star Sigma Coronae Borealis Bb is 1.137 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: 124 % R Sun
| 12.4 R Jupiter
+
Star size
Radius of the star Sigma Coronae Borealis Bb is 1.244 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: 5870 K | 1.02 T Sun
+
Star temperature
Surface temperature of Sigma Coronae Borealis Bb is 5870 K, which is 102 % 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

Sigma Coronae Borealis Ca

Red dwarf, High proper motion star
Spectral class: M2.5V

Basic characteristic

icon weight
Mass: 42.3 % M Sun
| 443 M Jupiter
+
Star mass
Mass of the star Sigma Coronae Borealis Ca is 1.090 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: 44 % R Sun
| 4.3 R Jupiter
+
Star size
Radius of the star Sigma Coronae Borealis Ca is 0.437 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: 3454 K | 0.6 T Sun
+
Star temperature
Surface temperature of Sigma Coronae Borealis Ca is 3454 K, which is 60 % 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 iconApparent magnitude (V): 14.3
Magnitude iconAbsolute magnitude (V): 12.5
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

Sigma Coronae Borealis Cb

Red dwarf, , High proper motion star

Basic characteristic

icon weight
Mass: 10 % M Sun
| 105 M Jupiter
+
Star mass
Mass of the star Sigma Coronae Borealis Cb is 0.423 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: 3500 K
 (estimate)
+
Star temperature
Surface temperature of Sigma Coronae Borealis Cb is estimated to be 3542 K, which is 61 % 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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Sigma Coronae Borealis system structure

 Sigma Coronae Borealis A
Sigma Coronae Borealis Ba
Sigma Coronae Borealis Bb
Sigma Coronae Borealis Ca
Sigma Coronae Borealis Cb

More about Sigma Coronae Borealis

       Sigma Coronae Borealis 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
GJ 9549, Gliese 9549, HIP 79551, WDS J16147+3352E, G 180-42, σ CrB, 17 CrB, BD+34° 2750, HIP 79607 (only AB), SAO 65165, ADS 9979, σ2 CrB, TZ CrB, GJ 9550B, Gliese 9550B, HD 146361, HR 6064, CCDM J16147+3352A, WDS J16147+3352A, TYC 2583-1846-1, Gaia EDR3 1328866562170960512
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Frequently Asked Questions

How far is the Sigma Coronae Borealis system from the Sun?

The Sigma Coronae Borealis system is 74 light years or 22.7 parsecs from the Sun.

What galaxy is the Sigma Coronae Borealis star in?

The Sigma Coronae Borealis is in the Milky Way galaxy just like the Sun.

How many stars are in the Sigma Coronae Borealis system?

The Sigma Coronae Borealis system contains 5 stars.

What type of star is the Sigma Coronae Borealis?

The primary in the Sigma Coronae Borealis system is a Yellow-White star star.

What temperature is star Sigma Coronae Borealis?

The primary in the Sigma Coronae Borealis system has a temperature of 5950 K. Find out more about the temperature of stars in Stellar guide
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