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Tau Scorpii
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Star Tau Scorpii

Blue-white star Tau Scorpii is located 474 light years away from the Sun. It is a single star of spectral class B0.2 V, that has 1500 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
474 light years
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Tau Scorpii

Blue-white star
Spectral class: B0.2 V

Location +

Ascension iconRight ascension: 16h 35m 52.953s
Declination iconDeclination: -28° 12' 57.661'' (southern hemisphere)
Parallax iconParallax: 6.880
Distance iconSun distance: 474.064 ly | 145.3 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: 1500 % M Sun
| 15714 M Jupiter
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Star mass
Mass of the star Tau Scorpii is 15.0 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: 650 % R Sun
| 64.7 R Jupiter
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Star size
Radius of the star Tau Scorpii is 6.5 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: 31440 K | 5.44 T Sun
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Star temperature
Surface temperature of Tau Scorpii is 31440 K, which is 544 % 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: 0.0057 billions years | 0 Sun
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Star age
Star Tau Scorpii is 0.0057 billion years old, which is about 0 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: 20400 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
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Tau Scorpii system structure

 Tau Scorpii

More about Tau Scorpii

Star Tau Scorpii is a main sequence star that fuses hydrogen atoms into helium. It is is approximately 7 times bigger than the Sun and temperature on its surface is around 31440 K (31167 °C), which is about 544 % of Sun's temperature.
       Tau Scorpii can be found in southern celestial hemisphere.
Other designations of this star
Paikauhale, Alniyat, Al Niyat, τ Sco, 23 Sco, FK5 620, GC 22303, HD 149438, HIC 81266, HIP 81266, HR 6165, SAO 184481
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Frequently Asked Questions

How far is the Tau Scorpii system from the Sun?

The Tau Scorpii system is 474 light years or 145.3 parsecs from the Sun.

What galaxy is the Tau Scorpii star in?

The Tau Scorpii is in the Milky Way galaxy just like the Sun.

How many stars are in the Tau Scorpii system?

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

What type of star is the Tau Scorpii?

The star Tau Scorpii is a Blue-white star star.

What temperature is star Tau Scorpii?

The star Tau Scorpii has an effective temperature of 31440 K. Find out more about the temperature of stars in Stellar guide
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Estimated values
icon Objects listed in the Stellar Catalog often have values that are estimates. These estimates are determined using their known characteristics, such as spectral type, brightness across different wavelengths, distance from a star, and other factors.
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