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BUG 5 B
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Star BUG 5 B

Brown dwarf BUG 5 B is located 39 light years away from the Sun. It is a single star of spectral class L3 C, that has typically about 4 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
39 light years
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BUG 5 B

Brown dwarf
Spectral class: L3 C

Basic characteristic

radius icon
Size: 10 % R Sun
| 1.1 R Jupiter
(estimate)
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Star size
Radius of the star BUG 5 B is not known. Its estimated value based on other similar stars is about 10 % 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: 2000 K
 (estimate)
+
Star temperature
Surface temperature of BUG 5 B is estimated to be 2000 K, which is 35 % 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
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BUG 5 B system structure

 BUG 5 A
BUG 5 B

More about BUG 5 B

       BUG 5 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
** BUG 5B, WDS J17074-0558B
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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
A Spatial Map of the Atmospheric Limb of a Hot Jupiter
Scientific study, Accepted: 14. 10. 2026
icon study
icon study

News from this star system

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....
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Molecular emission in the disk around DM Tauri reveals complex chemical processes
iconYesterday
Image: Molecular emission in the disk around DM Tauri reveals complex chemical processes
Observations of the disk around DM Tauri reveal how N2H+ and DCO+ molecules are distributed. The data show that external UV radiation and cosmic rays influence the chemical makeup of the disk out to 400 astronomical units, impacting how planets may form....
Read article tag icon

Frequently Asked Questions

How far is the BUG 5 B system from the Sun?

The BUG 5 B system is 39 light years or 12.0 parsecs from the Sun.

What galaxy is the BUG 5 B star in?

The BUG 5 B is in the Milky Way galaxy just like the Sun.

How many stars are in the BUG 5 B system?

The BUG 5 B is a single star, there are no other known stars in the system.

What type of star is the BUG 5 B?

The star BUG 5 B is a Brown dwarf star.

What temperature is the BUG 5 B?

The primary in the BUG 5 B system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
Class of stars Brown dwarf
Brown dwarfs are not really stars, because there is no thermonuclear fusion in their core. These objects are smaller and cooler than stars, but too massive to be considered planets.
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Estimated values
icon Objects listed in the Stellar Catalog often have values that are estimates. These estimates are determined using their known characteristics, such as spectral type, brightness across different wavelengths, distance from a star, and other factors.
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