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Alpha2 Librae
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Star Alpha2 Librae

Multiple star system Alpha2 Librae is located 76 light years away from the Sun. It is a system with 4 stars. For now, there are no known exoplanets in this star system.
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Sun distance
76 light years
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Alpha2 Librae A

Subgiant, Spectroscopic binary
Spectral class: kA2hA5mA4IV-V

Location +

Ascension iconRight ascension: 14h 50m 52.722s
Declination iconDeclination: -16° 2' 30.395'' (equatorial region)
Parallax iconParallax: 43.030
Distance iconSun distance: 75.797 ly | 23.2 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: 195 % M Sun
| 2043 M Jupiter
+
Star mass
Mass of the star Alpha2 Librae A is 1.95 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: 280 % R Sun
| 27.9 R Jupiter
+
Star size
Radius of the star Alpha2 Librae A is 2.8 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: 8128 K | 1.41 T Sun
+
Star temperature
Surface temperature of Alpha2 Librae A is 8128 K, which is 141 % 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): 2.8
Magnitude iconAbsolute magnitude (V): 0.9
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

Alpha1 Librae A

Yellow-White star, Spectroscopic binary
Spectral class: F3V

Basic characteristic

icon weight
Mass: 140 % M Sun
| 1467 M Jupiter
+
Star mass
Mass of the star Alpha1 Librae A is 1.95 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: 141 % R Sun
| 14 R Jupiter
+
Star size
Radius of the star Alpha1 Librae A is 1.409 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: 6653 K | 1.15 T Sun
+
Star temperature
Surface temperature of Alpha1 Librae A is 6653 K, which is 115 % 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): 5.2
Magnitude iconAbsolute magnitude (V): 3.3
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

Alpha1 Librae B

Red dwarf, , Spectroscopic binary

Basic characteristic

icon weight
Mass: 50 % M Sun
| 524 M Jupiter
+
Star mass
Mass of the star Alpha1 Librae B is 1.4 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: 6700 K
 (estimate)
+
Star temperature
Surface temperature of Alpha1 Librae B is estimated to be 6697 K, which is 116 % 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

Alpha2 Librae B

White-Blue star, , , Spectroscopic binary

Basic characteristic

icon weight
Mass: 179 % M Sun
| 1875 M Jupiter
+
Star mass
Mass of the star Alpha2 Librae B is 0.5 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
temperature iconTemperature: 6700 K
 (estimate)
+
Star temperature
Surface temperature of Alpha2 Librae B is estimated to be 6697 K, which is 116 % 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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Alpha2 Librae system structure

 Alpha2 Librae A
Alpha1 Librae A
Alpha1 Librae B
Alpha2 Librae B

More about Alpha2 Librae

       Alpha2 Librae can be found in southern celestial hemisphere, and it is possible to see it with naked eye. The star is also observable from Northern America, Europe and Asia.
Other designations of this star
α2 Lib, 9 Librae, BD−15 3966, FK5 548, HD 130841, HIP 72622, HR 5531, SAO 158840
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Frequently Asked Questions

How far is the Alpha2 Librae system from the Sun?

The Alpha2 Librae system is 76 light years or 23.2 parsecs from the Sun.

What galaxy is the Alpha2 Librae star in?

The Alpha2 Librae is in the Milky Way galaxy just like the Sun.

How many stars are in the Alpha2 Librae system?

The Alpha2 Librae system contains 4 stars.

What type of star is the Alpha2 Librae?

The primary in the Alpha2 Librae system is a Subgiant star.

What temperature is star Alpha2 Librae?

The primary in the Alpha2 Librae system has a temperature of 8128 K. Find out more about the temperature of stars in Stellar guide
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