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GG Tauri Bb
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Star GG Tauri Bb

T Tauri star GG Tauri Bb is located 380 light years away from the Sun. It is a single star of spectral class M7, that has 4 % of solar mass. 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 Bb

T Tauri star
Spectral class: M7

Basic characteristic

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Mass: 4 % M Sun
| 42 M Jupiter
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Star mass
Mass of the star GG Tauri Bb is 0.04 solar masses (or 41.9 Jupiter 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)
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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)
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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
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Age: 0.0015 billions years | 0 Sun
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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
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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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GG Tauri Bb system structure

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

More about GG Tauri Bb

       GG Tauri Bb can be found in northern celestial hemisphere.
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External sources
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Scientific study, Accepted: 29. 12. 2026
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A Spatial Map of the Atmospheric Limb of a Hot Jupiter
Scientific study, Accepted: 14. 10. 2026
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News from this star system

Atmospheric composition of hot Jupiter KELT-2A b reveals chemical history
iconToday
Image: Atmospheric composition of hot Jupiter KELT-2A b reveals chemical history
New observations of hot Jupiter KELT-2A b confirm water vapor in its atmosphere. The planet shows a carbon-to-oxygen ratio similar to its host star but with overall lower metallicity, suggesting a complex migration history from far out in its star system....
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Periodic transit timing variations measured for Neptune-like planet HAT-P-18 b
iconToday
Image: Periodic transit timing variations measured for Neptune-like planet HAT-P-18 b
New observations from the James Webb Space Telescope show periodic transit timing variations in the Neptune-like planet HAT-P-18 b. The data indicates an orbital timing shift of 92.9 seconds, providing fresh insights into the dynamics of this distant system....
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Orbital and atmospheric evolution of the mini-Neptune TOI-2257 b
iconToday
Image: Orbital and atmospheric evolution of the mini-Neptune TOI-2257 b
The exoplanet TOI-2257 b orbits its star once every 35 days with a high eccentricity. New models suggest its atmospheric and orbital fate depends on whether it is a gas-rich mini-Neptune or a rocky super-Earth. Higher eccentricity would confirm a gaseous nature....
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Frequently Asked Questions

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

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

What galaxy is the GG Tauri Bb star in?

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

How many stars are in the GG Tauri Bb system?

The GG Tauri Bb is a single star, there are no other known stars in the system.

What type of star is the GG Tauri Bb?

The star GG Tauri Bb is a T Tauri star star.

What temperature is the GG Tauri Bb?

The primary in the GG Tauri Bb system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
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