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289 G. Hydrae
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Star 289 G. Hydrae

Binary star 289 G. Hydrae is located 31 light years away from the Sun. It consists of a orange star and a white dwarf. For now, there are no known exoplanets in this star system.
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Sun distance
31 light years
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289 G. Hydrae A

Orange star, High proper motion star
Spectral class: K0 V

Location +

Ascension iconRight ascension: 11h 34m 28.640s
Declination iconDeclination: -32° 49' 39.665'' (southern hemisphere)
Parallax iconParallax: 104.613
Distance iconSun distance: 31.177 ly | 9.6 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: 87 % M Sun
| 911 M Jupiter
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Star mass
Mass of the star 289 G. Hydrae A is 0.87 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: 84 % R Sun
| 8.4 R Jupiter
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Star size
Radius of the star 289 G. Hydrae A is 0.84 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: 5241 K | 0.91 T Sun
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Star temperature
Surface temperature of 289 G. Hydrae A is 5241 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 billions years | 1.09 Sun
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Star age
Star 289 G. Hydrae A is 5 billion years old, which is about 1.09 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: 0.37 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): 6
Magnitude iconAbsolute magnitude (V): 6.1
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

289 G. Hydrae B

White dwarf, , High proper motion star
Spectral class: DC8

Basic characteristic

icon weight
Mass: 8 % M Sun
| 911.4 M Jupiter
(estimate)
Array
temperature iconTemperature: 6500 K
 (estimate)
+
Star temperature
Surface temperature of 289 G. Hydrae B is estimated to be 6500 K, which is 112 % 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 billions years | 1.09 Sun
+
Star age
Star 289 G. Hydrae B is 5 billion years old, which is about 1.09 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

Photometry

Magnitude iconApparent magnitude (V): 15
Magnitude iconAbsolute magnitude (V): 15.1
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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289 G. Hydrae system structure

 289 G. Hydrae A
289 G. Hydrae B

More about 289 G. Hydrae

       289 G. Hydrae can be found in southern celestial hemisphere, and it is possible to see it with naked eye. The star is also observable from Northern America, Europe and Asia.
Other designations of this star
WD 1132-325, VB 04, GJ 432 B, 20 Crt B, CD−32°8179, Gliese 432, GJ 432, HD 100623, HIP 56452, HR 4458, SAO 202583, LHS 308, LTT 4280, 20 Crt, Gaia EDR3 3478127463341507072
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External sources
simbad icon
Simbad database (* 20 Crt B)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 3478127467639543296)
Archive from the Gaia mission

Frequently Asked Questions

How far is the 289 G. Hydrae system from the Sun?

The 289 G. Hydrae system is 31 light years or 9.6 parsecs from the Sun.

What galaxy is the 289 G. Hydrae star in?

The 289 G. Hydrae is in the Milky Way galaxy just like the Sun.

How many stars are in the 289 G. Hydrae system?

The 289 G. Hydrae system contains 2 stars.

What type of star is the 289 G. Hydrae?

The primary in the 289 G. Hydrae system is a Orange star star.

What temperature is star 289 G. Hydrae?

The primary in the 289 G. Hydrae system has a temperature of 5241 K. Find out more about the temperature of stars in Stellar guide
Closest stars

 WISE J114156.71-332635.8
 - 0.9 ly

Gliese 433
 0.48 M☉ 1.6 ly

PM J11413-3624
 - 3.5 ly

66 G. Centauri
 0.89 M☉ 4.4 ly

Gliese 453
 - 4.5 ly
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