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Gliese 1221
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Star Gliese 1221

White dwarf Gliese 1221 is located 20 light years away from the Sun. It is a single star of spectral class DQ9P, that has 81 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
20 light years
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Gliese 1221

White dwarf
Spectral class: DQ9P

Location +

Ascension iconRight ascension: 17h 48m 3.870s
Declination iconDeclination: 70° 52' 53.666'' (northern hemisphere)
Parallax iconParallax: 160.995
Distance iconSun distance: 20.259 ly | 6.2 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: 81 % M Sun
| 849 M Jupiter
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Star mass
Mass of the star Gliese 1221 is 0.81 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: 1 % R Sun
| 0.1 R Jupiter
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Star size
Radius of the star Gliese 1221 is 0.00984 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: 5260 K | 0.91 T Sun
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Star temperature
Surface temperature of Gliese 1221 is 5260 K, which is 91 % 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: 5.69 billions years | 1.24 Sun
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Star age
Star Gliese 1221 is 5.69 billion years old, which is about 1.24 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: 0.000085 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

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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Gliese 1221 system structure

 Gliese 1221

More about Gliese 1221

Nearby star Gliese 1221 is is is much smaller than the Sun and temperature on its surface is around 5260 K (4987 °C), which is about 91 % of Sun's temperature.
       Gliese 1221 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
EGGR 372, G 240-72, LP 44-113, WD 1748+708, LHS 455, NLTT 45565, Gaia EDR3 1638979384378696704
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External sources
simbad icon
Simbad database (EGGR 372)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 1638979384378696704)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Gliese 1221 system from the Sun?

The Gliese 1221 system is 20 light years or 6.2 parsecs from the Sun.

What galaxy is the Gliese 1221 star in?

The Gliese 1221 is in the Milky Way galaxy just like the Sun.

How many stars are in the Gliese 1221 system?

The Gliese 1221 is a single star, there are no other known stars in the system.

What type of star is the Gliese 1221?

The star Gliese 1221 is a White dwarf star.

What temperature is star Gliese 1221?

The star Gliese 1221 has an effective temperature of 5260 K. Find out more about the temperature of stars in Stellar guide
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