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HP Tauri
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Star HP Tauri

Multiple star system HP Tauri is located 559 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
559 light years
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HP Tauri

T Tauri star
Spectral class: K2-5e

Location +

Ascension iconRight ascension: 4h 35m 52.801s
Declination iconDeclination: 22° 54' 22.935'' (northern hemisphere)
Parallax iconParallax: 5.839
Distance iconSun distance: 558.535 ly | 171.2 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: 121 % M Sun
| 1268 M Jupiter
+
Star mass
Mass of the star HP Tauri is 1.21 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: 160 % R Sun
| 15.9 R Jupiter
+
Star size
Radius of the star HP Tauri is 1.60 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: 4522 K | 0.78 T Sun
+
Star temperature
Surface temperature of HP Tauri is 4522 K, which is 78 % 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: 0.001 billions years | 0 Sun
+
Star age
Star HP Tauri is 0.001 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: 0.99 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): 14.9
Magnitude iconAbsolute magnitude (V): 8.7
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

HP Tauri G2

Yellow star

Basic characteristic

temperature icon
Temperature: 6030 K | 1.04 T Sun
+
Star temperature
Surface temperature of HP Tauri G2 is 6030 K, which is 104 % 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

HP Tauri G3

Red dwarf

Basic characteristic

temperature iconTemperature: 4800 K
 (estimate)
+
Star temperature
Surface temperature of HP Tauri G3 is estimated to be 4834 K, which is 83 % 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

HP Tauri G3 B

Red dwarf

Basic characteristic

temperature iconTemperature: 4800 K
 (estimate)
+
Star temperature
Surface temperature of HP Tauri G3 B is estimated to be 4834 K, which is 83 % 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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HP Tauri system structure

 HP Tauri
HP Tauri G2
HP Tauri G3
HP Tauri G3 B

More about HP Tauri

       HP 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
Gaia DR3 145213187879627776
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External sources
icon study
The Walkaway Star HP Tau/G2: Evidence for a Stellar Merger
Scientific study, Accepted: 06. 02. 2026

Frequently Asked Questions

How far is the HP Tauri system from the Sun?

The HP Tauri system is 559 light years or 171.2 parsecs from the Sun.

What galaxy is the HP Tauri star in?

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

How many stars are in the HP Tauri system?

The HP Tauri system contains 4 stars.

What type of star is the HP Tauri?

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

What temperature is star HP Tauri?

The primary in the HP Tauri system has a temperature of 4522 K. Find out more about the temperature of stars in Stellar guide
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