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Xi Bootis
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Star Xi Bootis

Binary star Xi Bootis is located 22 light years away from the Sun. It consists of a orange star and a yellow star. For now, there are no known exoplanets in this star system.
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Sun distance
22 light years
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Xi Bootis A

Yellow star, High proper motion star
Spectral class: G8Ve

Location +

Ascension iconRight ascension: 14h 51m 23.536s
Declination iconDeclination: 19° 6' 0.971'' (equatorial region)
Parallax iconParallax: 148.069
Distance iconSun distance: 22.027 ly | 6.8 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: 88.1 % M Sun
| 923 M Jupiter
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Star mass
Mass of the star Xi Bootis A is 0.881 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: 86 % R Sun
| 8.6 R Jupiter
+
Star size
Radius of the star Xi Bootis A is 0.863 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: 5480 K | 0.95 T Sun
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Star temperature
Surface temperature of Xi Bootis A is 5480 K, which is 95 % 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: 6.5 billions years | 1.41 Sun
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Star age
Star Xi Bootis A is 6.5 billion years old, which is about 1.41 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: 0.6041 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): 4.7
Magnitude iconAbsolute magnitude (V): 5.5
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

Xi Bootis B

Orange star, High proper motion star
Spectral class: K4Ve

Basic characteristic

icon weight
Mass: 70 % M Sun
| 733 M Jupiter
+
Star mass
Mass of the star Xi Bootis B is 0.881 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: 61 % R Sun
| 6.1 R Jupiter
+
Star size
Radius of the star Xi Bootis B is 0.61 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: 4767 K | 0.83 T Sun
+
Star temperature
Surface temperature of Xi Bootis B is 4767 K, which is 83 % 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: 6.5 billions years | 1.41 Sun
+
Star age
Star Xi Bootis B is 6.5 billion years old, which is about 1.41 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: 0.061 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): 6.8
Magnitude iconAbsolute magnitude (V): 7.7
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
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Xi Bootis system structure

 Xi Bootis A
Xi Bootis B

More about Xi Bootis

       Xi Bootis 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
Gliese 566, GJ 556, Ksi Bootis, ξ Boo, ξ Boötis, 37 Boötis, HD 131156, HIP 72659, HR 5544, SAO 101250, Gaia EDR3 1237090738916392704
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External sources
icon study
Zeeman Doppler Imaging of ksi Boo A and B
Scientific study, Accepted: 12. 05. 2023
simbad icon
Simbad database (* ksi Boo B)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 1237090738916392832)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Xi Bootis system from the Sun?

The Xi Bootis system is 22 light years or 6.8 parsecs from the Sun.

What galaxy is the Xi Bootis star in?

The Xi Bootis is in the Milky Way galaxy just like the Sun.

How many stars are in the Xi Bootis system?

The Xi Bootis system contains 2 stars.

What type of star is the Xi Bootis?

The primary in the Xi Bootis system is a Yellow star star.

What temperature is star Xi Bootis?

The primary in the Xi Bootis system has a temperature of 5480 K. Find out more about the temperature of stars in Stellar guide
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