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V401 Draconis
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Star V401 Draconis

Red dwarf V401 Draconis is located 65 light years away from the Sun. It is a single star of spectral class dM2.0, that has typically about 25 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
65 light years
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V401 Draconis

Red dwarf, BY Draconis variable
Spectral class: dM2.0

Location +

Ascension iconRight ascension: 18h 17m 25.056s
Declination iconDeclination: 48° 22' 3.106'' (northern hemisphere)
Parallax iconParallax: 50.403
Distance iconSun distance: 64.710 ly | 19.8 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: 50 % M Sun
| 481.9 M Jupiter
 (estimate)
+
Star mass
The mass of the star V401 Draconis is unknown. Based on its other characteristics, it is estimated to be about 50 % 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: 50 % R Sun
| 4.6 R Jupiter
(estimate)
+
Star size
Radius of the star V401 Draconis is not known. Its estimated value based on other similar stars is about 50 % 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: 3600 K
 (estimate)
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Star temperature
Surface temperature of V401 Draconis is estimated to be 3622 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

Photometry

Magnitude iconApparent magnitude (V): 11.4
Magnitude iconAbsolute magnitude (V): 9.9
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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V401 Draconis system structure

 V401 Draconis

More about V401 Draconis

      a BY Draconis variable. Stars from this category exhibit periodic variations in their luminosity. The variability is caused by a rotation which shows and hides starspots on the surface. V401 Draconis can be found in northern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope. 

      V401 Draconis is a BY Draconis variable. Stars from this category exhibit periodic variations in their luminosity. The variability is caused by a rotation which shows and hides starspots on the surface.
Other designations of this star
V* V401 Dra, Gaia DR3 2122104690545294208
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External sources
simbad icon
Simbad database (V* V401 Dra)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia DR3 2122104690545294208)
Archive from the Gaia mission

Frequently Asked Questions

How far is the V401 Draconis system from the Sun?

The V401 Draconis system is 65 light years or 19.8 parsecs from the Sun.

What galaxy is the V401 Draconis star in?

The V401 Draconis is in the Milky Way galaxy just like the Sun.

How many stars are in the V401 Draconis system?

The V401 Draconis is a single star, there are no other known stars in the system.

What type of star is the V401 Draconis?

The star V401 Draconis is a Red dwarf star.

What temperature is the V401 Draconis?

The primary in the V401 Draconis system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
Class of stars Red dwarf
Red dwarfs are small, cool stars with surface temperatures of about 2,000–3,800 K, much cooler than the Sun. They usually have 8–50% of the Sun’s mass and shine very faintly, sometimes at just a tiny fraction of the Sun’s brightness. Classified mainly as spectral type M, they are the most common stars in the Milky Way, making up roughly 70–75% of its stellar population.

They fuse hydrogen slowly through the proton–proton chain and are fully convective, which allows them to use their fuel very efficiently. As a result, red dwarfs can live for tens of billions to trillions of years—far longer than the Sun. Many exoplanets orbit red dwarfs, including some in close habitable zones, though strong stellar activity can affect planetary environments.
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