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GD 309
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Star GD 309

White dwarf GD 309 is located 83 light years away from the Sun. It is a single star of spectral class DA4.7, that has typically about 60 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
83 light years
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GD 309

White dwarf
Spectral class: DA4.7

Location +

Ascension iconRight ascension: 11h 26m 52.729s
Declination iconDeclination: 59° 19' 16.233'' (northern hemisphere)
Parallax iconParallax: 39.325
Distance iconSun distance: 82.938 ly | 25.4 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: 70 % M Sun
| 691.4 M Jupiter
 (estimate)
+
Star mass
The mass of the star GD 309 is unknown. Based on its other characteristics, it is estimated to be about 70 % of the Sun's mass.

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: 0 % R Sun
| 0.1 R Jupiter
(estimate)
+
Star size
Radius of the star GD 309 is not known. Its estimated value based on other similar stars is about 0 % 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: 11100 K
 (estimate)
+
Star temperature
Surface temperature of GD 309 is estimated to be 11117 K, which is 192 % 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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GD 309 system structure

 GD 309

More about GD 309

       GD 309 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 EDR3 859082970614616448
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External sources
simbad icon
Simbad database (GD 309)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 859082970614616448)
Archive from the Gaia mission

Frequently Asked Questions

How far is the GD 309 system from the Sun?

The GD 309 system is 83 light years or 25.4 parsecs from the Sun.

What galaxy is the GD 309 star in?

The GD 309 is in the Milky Way galaxy just like the Sun.

How many stars are in the GD 309 system?

The GD 309 is a single star, there are no other known stars in the system.

What type of star is the GD 309?

The star GD 309 is a White dwarf star.

What temperature is the GD 309?

The primary in the GD 309 system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
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icon Data in Stellar Catalog come from trusted scientific sources. Primary source is Gaia space telescope mapping the stars in Milky Way. Other sources include research papers, Simbad catalog and Exoplanet.eu database.
Estimated values
icon Objects listed in the Stellar Catalog often have values that are estimates. These estimates are determined using their known characteristics, such as spectral type, brightness across different wavelengths, distance from a star, and other factors.
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