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HK Tauri
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Star HK Tauri

Binary star HK Tauri is located 428 light years away from the Sun. It consists of 2 t tauri star stars. For now, there are no known exoplanets in this star system.
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Sun distance
428 light years
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HK Tauri A

T Tauri star
Spectral class: M1.5

Location +

Ascension iconRight ascension: 0h 18m 7.373s
Declination iconDeclination: 24° 24' 17.775'' (northern hemisphere)
Parallax iconParallax: 7.625
Distance iconSun distance: 428.000 ly | 131.2 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: 44 % M Sun
| 461 M Jupiter
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Star mass
Mass of the star HK Tauri A is 0.44 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 icon
Temperature: 3680 K | 0.64 T Sun
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Star temperature
Surface temperature of HK Tauri A is 3680 K, which is 64 % 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
luminosity icon
Luminosity: 0.56 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

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

HK Tauri B

T Tauri star
Spectral class: M2

Location +

Distance iconDistance from the primary: 309 AU

Basic characteristic

icon weight
Mass: 37 % M Sun
| 388 M Jupiter
+
Star mass
Mass of the star HK Tauri B is 0.44 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 icon
Temperature: 3550 K | 0.61 T Sun
+
Star temperature
Surface temperature of HK Tauri B is 3550 K, which is 61 % 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
luminosity icon
Luminosity: 0.42 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): 18
Magnitude iconAbsolute magnitude (V): 12.4
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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HK Tauri system structure

 HK Tauri A
HK Tauri B 309 AU

More about HK Tauri

       HK Tauri can be found in northern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.
Other designations of this star
2MASS J04315056+2424180, WISE J043150.56+242417.6
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External sources
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Frequently Asked Questions

How far is the HK Tauri system from the Sun?

The HK Tauri system is 428 light years or 131.2 parsecs from the Sun.

What galaxy is the HK Tauri star in?

The HK Tauri is in the Milky Way galaxy just like the Sun.

How many stars are in the HK Tauri system?

The HK Tauri system contains 2 stars.

What type of star is the HK Tauri?

The primary in the HK Tauri system is a T Tauri star star.

What temperature is star HK Tauri?

The primary in the HK Tauri system has a temperature of 3680 K. Find out more about the temperature of stars in Stellar guide

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30. 10. 2026
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A SPHEREx survey of more than 20,000 young stars finds that signs of water and carbon dioxide ice drop sharply as stars age past three million years. The latest findings also show how internal strength limits the size of rocky debris orbiting white dwarfs.
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