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Groombridge 34
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Star Groombridge 34

Binary star Groombridge 34 is located 12 light years away from the Sun. It consists of 2 red dwarf stars. There are multiple known exoplanets in this system.
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Sun distance
12 light years
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Groombridge 34 A

Red dwarf, flare star
Spectral class: M2V

Location +

Ascension iconRight ascension: 0h 18m 27.179s
Declination iconDeclination: 44° 1' 29.232'' (northern hemisphere)
Parallax iconParallax: 280.707
Distance iconSun distance: 11.619 ly | 3.6 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: 39.8 % M Sun
| 417 M Jupiter
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Star mass
Mass of the star Groombridge 34 A is 0.398 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: 39 % R Sun
| 3.9 R Jupiter
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Star size
Radius of the star Groombridge 34 A is 0.388 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: 3603 K | 0.62 T Sun
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Star temperature
Surface temperature of Groombridge 34 A is 3603 K, which is 62 % 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: 3.02 billions years | 0.66 Sun
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Star age
Star Groombridge 34 A is 3.02 billion years old, which is about 0.66 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: 0.022 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): 8.1
Magnitude iconAbsolute magnitude (V): 10.3
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

Groombridge 34 B

Red dwarf, flare star
Spectral class: M4.1 V

Location +

Distance iconDistance from the primary: 93 AU

Basic characteristic

icon weight
Mass: 16 % M Sun
| 168 M Jupiter
+
Star mass
Mass of the star Groombridge 34 B is 0.398 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: 18 % R Sun
| 1.8 R Jupiter
+
Star size
Radius of the star Groombridge 34 B is 0.18 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: 3318 K | 0.57 T Sun
+
Star temperature
Surface temperature of Groombridge 34 B is 3318 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: 2.754 billions years | 0.6 Sun
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Star age
Star Groombridge 34 B is 2.754 billion years old, which is about 0.6 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: 0.00085 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): 11
Magnitude iconAbsolute magnitude (V): 13.3
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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Groombridge 34 system structure

 Groombridge 34 A
Groombridge 34 A b 0.07 AU 4 M⊕ 11.4 days
Groombridge 34 A c 5.4 AU 35 M⊕ 6694 days
Groombridge 34 B 93 AU

More about Groombridge 34

       Groombridge 34 can be found in northern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope. The star is easily observable from Northern America, Europe and Asia.
Other designations of this star
GQ Andromedae, Gliese 15 B, G 171-048, LHS 4, LTT 10109, GX Andromedae, V* GX And, BD+43° 44, GCTP 49, Gliese 15 A, GJ 15 A, Gl 15 A, G 171-047, HD 1326, HIP 1475, LHS 3, LTT 10108, SAO 36248, Gaia EDR3 385334230892516480
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External sources
icon study
simbad icon
Simbad database (V* GQ And)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 385334196532776576)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Groombridge 34 system from the Sun?

The Groombridge 34 system is 12 light years or 3.6 parsecs from the Sun.

What galaxy is the Groombridge 34 star in?

The Groombridge 34 is in the Milky Way galaxy just like the Sun.

How many stars are in the Groombridge 34 system?

The Groombridge 34 system contains 2 stars.

What type of star is the Groombridge 34?

The primary in the Groombridge 34 system is a Red dwarf star.

What temperature is star Groombridge 34?

The primary in the Groombridge 34 system has a temperature of 3603 K. Find out more about the temperature of stars in Stellar guide
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