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Alpha Hydri
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Star Alpha Hydri

Yellow-White star Alpha Hydri is located 72 light years away from the Sun. It is a single star of spectral class F0IV, that has 200 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
72 light years
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Alpha Hydri

Yellow-White star, High proper motion star
Spectral class: F0IV

Location +

Ascension iconRight ascension: 1h 58m 46.202s
Declination iconDeclination: -61° 34' 11.495'' (southern hemisphere)
Parallax iconParallax: 45.430
Distance iconSun distance: 71.793 ly | 22.0 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: 200 % M Sun
| 2095 M Jupiter
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Star mass
Mass of the star Alpha Hydri is 2.0 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: 304 % R Sun
| 30.3 R Jupiter
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Star size
Radius of the star Alpha Hydri is 3.040 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: 7087 K | 1.23 T Sun
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Star temperature
Surface temperature of Alpha Hydri is 7087 K, which is 123 % 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: 0.810 billions years | 0.18 Sun
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Star age
Star Alpha Hydri is 0.810 billion years old, which is about 0.18 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: 21 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): 2.8
Magnitude iconAbsolute magnitude (V): 1.1
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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Alpha Hydri system structure

 Alpha Hydri

More about Alpha Hydri

Nearby star Alpha Hydri is is approximately 3 times bigger than the Sun and temperature on its surface is around 7087 K (6814 °C), which is about 123 % of Sun's temperature.
       Alpha Hydri can be found in southern celestial hemisphere, and it is possible to see it with naked eye.
Other designations of this star
α Hyi, CD−62° 71, GJ 83, Gliese 83, HIP 9236, HR 591, SAO 248474
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External sources
simbad icon
Simbad database (* alf Hyi)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)

Frequently Asked Questions

How far is the Alpha Hydri system from the Sun?

The Alpha Hydri system is 72 light years or 22.0 parsecs from the Sun.

What galaxy is the Alpha Hydri star in?

The Alpha Hydri is in the Milky Way galaxy just like the Sun.

How many stars are in the Alpha Hydri system?

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

What type of star is the Alpha Hydri?

The star Alpha Hydri is a Yellow-White star star.

What temperature is star Alpha Hydri?

The star Alpha Hydri has an effective temperature of 7087 K. Find out more about the temperature of stars in Stellar guide
Closest stars

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2MASS J02284355-6325052
 - 5.5 ly

SCR J0138-6029
 - 6.3 ly

HD 12058
 - 6.4 ly

L 173-39
 - 6.8 ly
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