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GG Tauri Aa
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Star GG Tauri Aa

Multiple star system GG Tauri Aa is located 380 light years away from the Sun. It is a system with 5 stars. For now, there are no known exoplanets in this star system.
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Sun distance
380 light years
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GG Tauri Aa

T Tauri star
Spectral class: K7

Location +

Ascension iconRight ascension: 4h 32m 30.370s
Declination iconDeclination: 17° 31' 40.203'' (equatorial region)
Parallax iconParallax: 8.591
Distance iconSun distance: 379.630 ly | 116.4 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: 78 % M Sun
| 817 M Jupiter
+
Star mass
Mass of the star GG Tauri Aa is 0.78 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: 140 % R Sun
| 13.8 R Jupiter
(estimate)
+
Star size
Radius of the star GG Tauri Aa is not known. Its estimated value based on other similar stars is about 140 % 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: 3700 K | 0.64 T Sun
+
Star temperature
Surface temperature of GG Tauri Aa is 3700 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
time icon
Age: 0.0015 billions years | 0 Sun
+
Star age
Star GG Tauri Aa is 0.0015 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: 0.38 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

GG Tauri Ab

T Tauri star
Spectral class: M0.5

Basic characteristic

temperature icon
Temperature: 3300 K | 0.57 T Sun
+
Star temperature
Surface temperature of GG Tauri Ab is 3300 K, which is 57 % 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: 0.0015 billions years | 0 Sun
+
Star age
Star GG Tauri Ab is 0.0015 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: 0.133 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

GG Tauri Ac

T Tauri star

Basic characteristic

temperature iconTemperature: 3300 K
 (estimate)
+
Star temperature
Surface temperature of GG Tauri Ac is estimated to be 3300 K, which is 57 % 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

GG Tauri Ba

T Tauri star
Spectral class: M5

Basic characteristic

icon weight
Mass: 12 % M Sun
| 126 M Jupiter
+
Star mass
Mass of the star GG Tauri Ba is 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: 20 % R Sun
| 1.5 R Jupiter
(estimate)
+
Star size
Radius of the star GG Tauri Ba is not known. Its estimated value based on other similar stars is about 20 % 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: 3200 K
 (estimate)
+
Star temperature
Surface temperature of GG Tauri Ba is estimated to be 3173 K, which is 55 % 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: 0.0015 billions years | 0 Sun
+
Star age
Star GG Tauri Ba is 0.0015 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: 0.096 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

GG Tauri Bb

T Tauri star
Spectral class: M7

Basic characteristic

icon weight
Mass: 4 % M Sun
| 42 M Jupiter
+
Star mass
Mass of the star GG Tauri Bb is 0.12 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: 10 % R Sun
| 0.9 R Jupiter
(estimate)
+
Star size
Radius of the star GG Tauri Bb is not known. Its estimated value based on other similar stars is about 10 % 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: 2800 K
 (estimate)
+
Star temperature
Surface temperature of GG Tauri Bb is estimated to be 2804 K, which is 48 % 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: 0.0015 billions years | 0 Sun
+
Star age
Star GG Tauri Bb is 0.0015 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: 0.015 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
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GG Tauri Aa system structure

 GG Tauri Aa
GG Tauri Ab
GG Tauri Ac
GG Tauri Ba
GG Tauri Bb

More about GG Tauri Aa

       GG Tauri Aa 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
GG Tau, WDS J04325+1732, TYC 1270-897-1, Gaia DR3 3314132593936905600
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External sources
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Frequently Asked Questions

How far is the GG Tauri Aa system from the Sun?

The GG Tauri Aa system is 380 light years or 116.4 parsecs from the Sun.

What galaxy is the GG Tauri Aa star in?

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

How many stars are in the GG Tauri Aa system?

The GG Tauri Aa system contains 5 stars.

What type of star is the GG Tauri Aa?

The primary in the GG Tauri Aa system is a T Tauri star star.

What temperature is star GG Tauri Aa?

The primary in the GG Tauri Aa system has a temperature of 3700 K. Find out more about the temperature of stars in Stellar guide
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