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Sigma Draconis
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Star Sigma Draconis

Orange star Sigma Draconis is located 19 light years away from the Sun. It is a single star of spectral class K0V, that has 85 % of solar mass. There is at least one exoplanet in this system.
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Sun distance
19 light years
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Sigma Draconis

Orange star, High proper motion star
Spectral class: K0V

Location +

Ascension iconRight ascension: 19h 32m 23.427s
Declination iconDeclination: 69° 39' 12.424'' (northern hemisphere)
Parallax iconParallax: 173.494
Distance iconSun distance: 18.799 ly | 5.8 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: 85 % M Sun
| 890 M Jupiter
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Star mass
Mass of the star Sigma Draconis is 0.85 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: 78 % R Sun
| 7.7 R Jupiter
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Star size
Radius of the star Sigma Draconis is 0.776 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: 5338 K | 0.92 T Sun
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Star temperature
Surface temperature of Sigma Draconis is 5338 K, which is 92 % 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 billions years | 0.65 Sun
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Star age
Star Sigma Draconis is 3 billion years old, which is about 0.65 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: 0.41 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): 4.7
Magnitude iconAbsolute magnitude (V): 5.9
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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Sigma Draconis system structure

 Sigma Draconis
Sigma Draconis b
unconfirmed
 0.81 AU 12 M⊕ -

More about Sigma Draconis

Nearby star Sigma Draconis is a main sequence star that fuses hydrogen atoms into helium. It is approximately 80 % of the size of Sun and temperature on its surface is around 5338 K (5065 °C), which is about 92 % of Sun's temperature.
       Sigma Draconis can be found in northern celestial hemisphere, and it is possible to see it with naked eye. The star is easily observable from Northern America, Europe and Asia.
Other designations of this star
Alsafi, Gliese 764, GJ 764, σ Draconis, 61 Draconis, BD+69°1053, GCTP 4607.00, HD 185144, HIC 96100, HIP 96100, HR 7462, LHS 477, GAT 1255, LFT 1486, LTT 15713, 2MASS J19322153+6939413, NLTT 47961, ROT 2825, TIC 259237827, TYC 4448-2481-1, WISEA J193222.79+693922.3, WDS J19324+6940A, Gaia EDR3 2261614264931057664
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External sources
icon study
simbad icon
Simbad database (* sig Dra)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 2261614264931057664)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Sigma Draconis system from the Sun?

The Sigma Draconis system is 19 light years or 5.8 parsecs from the Sun.

What galaxy is the Sigma Draconis star in?

The Sigma Draconis is in the Milky Way galaxy just like the Sun.

How many stars are in the Sigma Draconis system?

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

What type of star is the Sigma Draconis?

The star Sigma Draconis is a Orange star star.

What temperature is star Sigma Draconis?

The star Sigma Draconis has an effective temperature of 5338 K. Find out more about the temperature of stars in Stellar guide
Closest stars

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 0.81 M☉ 3.3 ly

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 0.4 M☉ 5 ly

Gliese 809
 0.61 M☉ 5.8 ly

Gliese 4053
 0.16 M☉ 6.8 ly

WISE J1506+7027
 0.09 M☉ 6.9 ly
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