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GM Aurigae
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Star GM Aurigae

T Tauri star GM Aurigae is located 521 light years away from the Sun. It is a single star of spectral class K6, that has 95 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
521 light years
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GM Aurigae

T Tauri star
Spectral class: K6

Location +

Ascension iconRight ascension: 4h 55m 10.983s
Declination iconDeclination: 30° 21' 59.376'' (northern hemisphere)
Parallax iconParallax: 6.264
Distance iconSun distance: 520.667 ly | 159.6 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: 95 % M Sun
| 995 M Jupiter
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Star mass
Mass of the star GM Aurigae is 0.95 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: 202 % R Sun
| 20.1 R Jupiter
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Star size
Radius of the star GM Aurigae is 2.02 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: 4287 K | 0.74 T Sun
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Star temperature
Surface temperature of GM Aurigae is 4287 K, which is 74 % 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
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Star age
Star GM Aurigae 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: 1.25 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): 12.2
Magnitude iconAbsolute magnitude (V): 6.2
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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GM Aurigae system structure

 GM Aurigae

More about GM Aurigae

Star GM Aurigae is a main sequence star that fuses hydrogen atoms into helium. It is is approximately 2 times bigger than the Sun and temperature on its surface is around 4287 K (4014 °C), which is about 74 % of Sun's temperature.
       GM Aurigae 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
HBC 77, 2MASS J04551098+3021595, TIC 96533063, WISE J045510.97+302159.2, 2E 1172, 2E 0451.9+3017, HBC 77, HBHA 2713-04, IRAS 04519+3017, IRAS C04519+3028, V* GM Aur, Gaia DR3 156907907082740480
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External sources
icon study
JWST Reveals Carbon-rich Chemistry in a Transitional Disk
Scientific study, Accepted: 11. 11. 2025
icon study
gaia icon
Gaia database (Gaia DR3 156907907082740480)
Archive from the Gaia mission

Frequently Asked Questions

How far is the GM Aurigae system from the Sun?

The GM Aurigae system is 521 light years or 159.6 parsecs from the Sun.

What galaxy is the GM Aurigae star in?

The GM Aurigae is in the Milky Way galaxy just like the Sun.

How many stars are in the GM Aurigae system?

The GM Aurigae is a single star, there are no other known stars in the system.

What type of star is the GM Aurigae?

The star GM Aurigae is a T Tauri star star.

What temperature is star GM Aurigae?

The star GM Aurigae has an effective temperature of 4287 K. Find out more about the temperature of stars in Stellar guide

stellar brief logoStellar Brief

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30. 10. 2026
stellar brief logo
The early architecture of planetary systems may be set at birth: a study of Sun-like stars found similar rates of star-planet misalignment across different stages of development. Other findings trace how water and carbon dioxide ice fade around young stars, why white-dwarf debris resists breaking into tiny pieces, and why a reported planet around Gliese 48 remains unconfirmed.
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