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Zeta Tucanae
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Star Zeta Tucanae

Yellow-White star Zeta Tucanae is located 28 light years away from the Sun. It is a single star of spectral class F9.5V, that has 99 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
28 light years
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Zeta Tucanae

Yellow-White star, High proper motion star
Spectral class: F9.5V

Location +

Ascension iconRight ascension: 0h 20m 8.548s
Declination iconDeclination: -64° 52' 10.622'' (southern hemisphere)
Parallax iconParallax: 116.183
Distance iconSun distance: 28.073 ly | 8.6 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: 99 % M Sun
| 1037 M Jupiter
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Star mass
Mass of the star Zeta Tucanae is 0.99 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: 108 % R Sun
| 10.7 R Jupiter
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Star size
Radius of the star Zeta Tucanae is 1.08 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: 5900 K | 1.02 T Sun
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Star temperature
Surface temperature of Zeta Tucanae is 5900 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
time icon
Age: 2.8 billions years | 0.61 Sun
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Star age
Star Zeta Tucanae is 2.8 billion years old, which is about 0.61 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: 1.26 L Sun
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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): 4.2
Magnitude iconAbsolute magnitude (V): 4.6
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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Zeta Tucanae system structure

 Zeta Tucanae

More about Zeta Tucanae

Nearby star Zeta Tucanae is a main sequence star that fuses hydrogen atoms into helium. It is is approximately 8 % bigger than the Sun and temperature on its surface is around 5900 K (5627 °C), which is about 102 % of Sun's temperature.
       Zeta Tucanae can be found in southern celestial hemisphere, and it is possible to see it with naked eye.
Other designations of this star
FK5 10, GCTP 54, Gliese 17, GJ 17, HD 1581, HIP 1599, HR 77, LHS 5, LTT 167, SAO 248163, GC 401, Gaia EDR3 4900108950849461248
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External sources
simbad icon
Simbad database (* zet Tuc)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 4900108950849461248)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Zeta Tucanae system from the Sun?

The Zeta Tucanae system is 28 light years or 8.6 parsecs from the Sun.

What galaxy is the Zeta Tucanae star in?

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

How many stars are in the Zeta Tucanae system?

The Zeta Tucanae is a single star, there are no other known stars in the system.

What type of star is the Zeta Tucanae?

The star Zeta Tucanae is a Yellow-White star star.

What temperature is star Zeta Tucanae?

The star Zeta Tucanae has an effective temperature of 5900 K. Find out more about the temperature of stars in Stellar guide
Closest stars

 Gliese 54
 0.43 M☉ 3 ly

WISE 0148-7202
 - 5.7 ly

L 88-59
 0.58 M☉ 5.8 ly

Gliese 877
 0 M☉ 6.2 ly

p Eridani
 0.88 M☉ 6.3 ly
3D map of stellar neighborhood
List of all nearby stars

stellar brief logoStellar Brief

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27. 10. 2026
stellar brief logo
A giant planet candidate near Boyajian’s star may look oversized because a broad ring system surrounds it, not because the planet itself is unusually large. New atmospheric models also show why methane and carbon monoxide can vary across hot gas giants, exposing major limits in simpler predictions.
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