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289 G. Hydrae B
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Star 289 G. Hydrae B

White dwarf 289 G. Hydrae B is located 31 light years away from the Sun. It is a single star of spectral class DC8, that has typically about 60 % of solar mass. 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 B

White dwarf
Spectral class: DC8

Basic characteristic

icon weight
Mass: 8 % M Sun
| 0 M Jupiter
(estimate)
Array
temperature iconTemperature: 6500 K
 (estimate)
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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
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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 B system structure

 289 G. Hydrae A
289 G. Hydrae B

More about 289 G. Hydrae B

       289 G. Hydrae B can be found in southern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.
Other designations of this star
WD 1132-325, VB 04, GJ 432 B, 20 Crt B, Gaia EDR3 3478127467639543296
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External sources
icon study
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Scientific study, Accepted: 29. 12. 2026
icon study
A Sample of Thick-Disk Stars Hosting Hot Jupiters
Scientific study, Accepted: 16. 10. 2026
icon study
icon study
icon study
icon study
icon study
icon study
icon study
A Spatial Map of the Atmospheric Limb of a Hot Jupiter
Scientific study, Accepted: 14. 10. 2026
icon study
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

News from this star system

WASP-33 b and other hot Jupiters identified as prime targets for structural studies
iconToday
Image: WASP-33 b and other hot Jupiters identified as prime targets for structural studies
WASP-33 b, WASP-76 b, and HAT-P-32 b are identified as the best candidates for studying how stellar gravity shapes exoplanet interiors. Measuring their physical deformation will help reveal their deep, internal density structures using JWST and Ariel data....
Read article tag icon
Atmospheric structure of WASP-94 A b revealed through new limb asymmetry method
iconToday
Image: Atmospheric structure of WASP-94 A b revealed through new limb asymmetry method
A new analysis of WASP-94 A b reveals a 415 K temperature difference between its morning and evening sides. The evening atmosphere shows signs of H2O, CO2, CO, and H2S, while the morning side remains obscured by aerosols....
Read article tag icon
Thick-disk stars identified as hosts to ancient hot jupiter planets
iconToday
Image: Thick-disk stars identified as hosts to ancient hot jupiter planets
New analysis of 268 stars identifies several hot Jupiters orbiting ancient stars in the Milky Way's thick disk. These systems, over 8 billion years old, show distinct differences in mass and orbital periods compared to younger thin-disk populations....
Read article tag icon

Frequently Asked Questions

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

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

What galaxy is the 289 G. Hydrae B star in?

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

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

The 289 G. Hydrae B is a single star, there are no other known stars in the system.

What type of star is the 289 G. Hydrae B?

The star 289 G. Hydrae B is a White dwarf star.

What temperature is the 289 G. Hydrae B?

The primary in the 289 G. Hydrae B system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
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