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CWISE J0146 0508 B
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Star CWISE J0146 0508 B

Brown dwarf CWISE J0146 0508 B is located 130 light years away from the Sun. It is a single star of spectral class L8, that has 6 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
130 light years
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CWISE J0146 0508 B

Brown dwarf
Spectral class: L8

Location +

Distance iconDistance from the primary: 129 AU

Basic characteristic

icon weight
Mass: 6.3 % M Sun
| 66 M Jupiter
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Star mass
Mass of the star CWISE J0146 0508 B is 0.063 solar masses (or 66 Jupiter 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: 20 % R Sun
| 1.7 R Jupiter
(estimate)
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Star size
Radius of the star CWISE J0146 0508 B is not known. Its estimated value based on other similar stars is about 20 % 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: 1340 K | 0.23 T Sun
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Star temperature
Surface temperature of CWISE J0146 0508 B is 1340 K, which is 23 % 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

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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CWISE J0146 0508 B system structure

 CWISE J0146 0508 A
CWISE J0146 0508 B 129 AU

More about CWISE J0146 0508 B

CWISE J0146 0508 B is approximately 20 % of the size of Sun and temperature on its surface is around 1340 K (1067 °C), which is about 23 % of Sun's temperature.
       CWISE J0146 0508 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.
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External sources
icon study
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Scientific study, Accepted: 29. 12. 2026
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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
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icon study
icon study
icon study

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Frequently Asked Questions

How far is the CWISE J0146 0508 B system from the Sun?

The CWISE J0146 0508 B system is 130 light years or 40.0 parsecs from the Sun.

What galaxy is the CWISE J0146 0508 B star in?

The CWISE J0146 0508 B is in the Milky Way galaxy just like the Sun.

How many stars are in the CWISE J0146 0508 B system?

The CWISE J0146 0508 B is a single star, there are no other known stars in the system.

What type of star is the CWISE J0146 0508 B?

The star CWISE J0146 0508 B is a Brown dwarf star.

What temperature is star CWISE J0146 0508 B?

The star CWISE J0146 0508 B has an effective temperature of 1340 K. 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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