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Kappa Tucanae
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Star Kappa Tucanae

Multiple star system Kappa Tucanae 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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Kappa Tucanae A

Subgiant, High proper motion star
Spectral class: F6IV

Location +

Ascension iconRight ascension: 1h 15m 47.320s
Declination iconDeclination: -68° 52' 31.545'' (southern hemisphere)
Parallax iconParallax: 42.991
Distance iconSun distance: 75.866 ly | 23.3 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: 137 % M Sun
| 1435 M Jupiter
+
Star mass
Mass of the star Kappa Tucanae A is 1.37 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: 200 % R Sun
| 19.5 R Jupiter
(estimate)
+
Star size
Radius of the star Kappa Tucanae A is not known. Its estimated value based on other similar stars is about 200 % 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: 6366 K | 1.1 T Sun
+
Star temperature
Surface temperature of Kappa Tucanae A is 6366 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

Photometry

Magnitude iconApparent magnitude (V): 5
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

Kappa Tucanae B

Yellow star, High proper motion star
Spectral class: G5V

Basic characteristic

icon weight
Mass: 85 % M Sun
| 890 M Jupiter
+
Star mass
Mass of the star Kappa Tucanae B is 1.37 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: 90 % R Sun
| 8.7 R Jupiter
(estimate)
+
Star size
Radius of the star Kappa Tucanae B is not known. Its estimated value based on other similar stars is about 90 % 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 iconTemperature: 18000 K
 (estimate)
+
Star temperature
Surface temperature of Kappa Tucanae B is estimated to be 18031 K, which is 312 % 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): 7.6
Magnitude iconAbsolute magnitude (V): 6
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

Kappa Tucanae C

Orange star, , High proper motion star
Spectral class: K2V

Basic characteristic

icon weight
Mass: 80 % M Sun
| 859 M Jupiter
 (estimate)
+
Star mass
The mass of the star Kappa Tucanae C is unknown. Based on its other characteristics, it is estimated to be about 80 % of the Sun's mass.

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: 80 % R Sun
| 7.9 R Jupiter
(estimate)
+
Star size
Radius of the star Kappa Tucanae C is not known. Its estimated value based on other similar stars is about 80 % 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 iconTemperature: 5000 K
 (estimate)
+
Star temperature
Surface temperature of Kappa Tucanae C is estimated to be 4992 K, which is 87 % 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): 7.8
Magnitude iconAbsolute magnitude (V): 6
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

Kappa Tucanae D

Red dwarf, , , High proper motion star

Basic characteristic

temperature iconTemperature: 5000 K
 (estimate)
+
Star temperature
Surface temperature of Kappa Tucanae D is estimated to be 4992 K, which is 87 % 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): 8.4
Magnitude iconAbsolute magnitude (V): 6.6
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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Kappa Tucanae system structure

 Kappa Tucanae A
Kappa Tucanae B
Kappa Tucanae C
Kappa Tucanae D

More about Kappa Tucanae

       Kappa Tucanae can be found in southern celestial hemisphere, and it is possible to see it with naked eye.
Other designations of this star
κ Tuc, HD 7788, HIP 5896, HR 377, SAO 248346, Gaia EDR3 4692263148249862016
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Frequently Asked Questions

How far is the Kappa Tucanae system from the Sun?

The Kappa Tucanae system is 76 light years or 23.3 parsecs from the Sun.

What galaxy is the Kappa Tucanae star in?

The Kappa Tucanae is in the Milky Way galaxy just like the Sun.

How many stars are in the Kappa Tucanae system?

The Kappa Tucanae system contains 4 stars.

What type of star is the Kappa Tucanae?

The primary in the Kappa Tucanae system is a Subgiant star.

What temperature is star Kappa Tucanae?

The primary in the Kappa Tucanae system has a temperature of 6366 K. Find out more about the temperature of stars in Stellar guide
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