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V401 Hydra
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Star V401 Hydra

Subgiant V401 Hydra is located 79 light years away from the Sun. It is a single star of spectral class G8/K0(IV), that has typically about 300 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
79 light years
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V401 Hydra

Subgiant, BY Draconis variable
Spectral class: G8/K0(IV)

Location +

Ascension iconRight ascension: 8h 37m 49.982s
Declination iconDeclination: -6° 48' 24.076'' (equatorial region)
Parallax iconParallax: 41.065
Distance iconSun distance: 79.425 ly | 24.4 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: 120 % M Sun
| 1215.2 M Jupiter
 (estimate)
+
Star mass
The mass of the star V401 Hydra is unknown. Based on its other characteristics, it is estimated to be about 120 % 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: 210 % R Sun
| 20.9 R Jupiter
(estimate)
+
Star size
Radius of the star V401 Hydra is not known. Its estimated value based on other similar stars is about 210 % 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: 5400 K
 (estimate)
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Star temperature
Surface temperature of V401 Hydra is estimated to be 5426 K, which is 93 % 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): 6.7
Magnitude iconAbsolute magnitude (V): 4.8
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 Hydra system structure

 V401 Hydra

More about V401 Hydra

      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 Hydra can be found in southern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope. The star is also observable from Northern America, Europe and Asia. 

      V401 Hydra 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 Hya, HD 73350, HIP 42333, 2MASS J08375030-0648248, WISEA J083750.08-064824.2, GJ 9273, Gliese 9273, TIC 51443167, Gaia EDR3 5755064487956174720
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External sources
simbad icon
Simbad database (V* V401 Hya)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 5755064487956174720)
Archive from the Gaia mission

Frequently Asked Questions

How far is the V401 Hydra system from the Sun?

The V401 Hydra system is 79 light years or 24.4 parsecs from the Sun.

What galaxy is the V401 Hydra star in?

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

How many stars are in the V401 Hydra system?

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

What type of star is the V401 Hydra?

The star V401 Hydra is a Subgiant star.

What temperature is the V401 Hydra?

The primary in the V401 Hydra system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
Class of stars Subgiant
A subgiant is a term used to describe a luminous star that is typically running out of hydrogen for nuclear fusion and is thus departing from the main sequence. These stars are classified as Yerkes luminosity class IV.
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