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TOI 5389 B
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Star TOI 5389 B

White dwarf TOI 5389 B is located 428 light years away from the Sun. It is a single star of spectral class DC, that has 57 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
428 light years
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TOI 5389 B

White dwarf
Spectral class: DC

Location +

Distance iconDistance from the primary: 2447 AU

Basic characteristic

icon weight
Mass: 57.3 % M Sun
| 600 M Jupiter
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Star mass
Mass of the star TOI 5389 B is 0.573 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
temperature icon
Temperature: 6500 K | 1.12 T Sun
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Star temperature
Surface temperature of TOI 5389 B is 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

Photometry

Magnitude iconAbsolute magnitude (V): -5.6
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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TOI 5389 B system structure

 TOI 5389 A
TOI 5389 A b 0.07 AU 21617.7 M⊕ 22.6 R⊕ 10.4 days
TOI 5389 B 2447 AU

More about TOI 5389 B

Temperature on its surface is around 6500 K (6227 °C), which is about 112 % of Sun's temperature.
       TOI 5389 B can be found in northern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.
Other designations of this star
Gaia DR3 765082934121253376
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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
gaia icon
Gaia database (Gaia DR3 765082934121253376 )
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....
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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....
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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 TOI 5389 B system from the Sun?

The TOI 5389 B system is 428 light years or 131.2 parsecs from the Sun.

What galaxy is the TOI 5389 B star in?

The TOI 5389 B is in the Milky Way galaxy just like the Sun.

How many stars are in the TOI 5389 B system?

The TOI 5389 B is a single star, there are no other known stars in the system.

What type of star is the TOI 5389 B?

The star TOI 5389 B is a White dwarf star.

What temperature is star TOI 5389 B?

The star TOI 5389 B has an effective temperature of 6500 K. Find out more about the temperature of stars in Stellar guide
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