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LSPM J0746+2000 B
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Star LSPM J0746+2000 B

Brown dwarf LSPM J0746+2000 B is located 40 light years away from the Sun. It is a single star of spectral class L1.5, 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
40 light years
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LSPM J0746+2000 B

Brown dwarf
Spectral class: L1.5

Location +

Distance iconDistance from the primary: 2.7 AU

Basic characteristic

icon weight
Mass: 6 % M Sun
| 62.9 M Jupiter
 (estimate)
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Star mass
The estimated mass of the star LSPM J0746+2000 B is about 6 % of the Sun's mass, or approximately 62.9 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: 10 % R Sun
| 1.2 R Jupiter
(estimate)
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Star size
Radius of the star LSPM J0746+2000 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: 2100 K
 (estimate)
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Star temperature
Surface temperature of LSPM J0746+2000 B is estimated to be 2097 K, which is 36 % 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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LSPM J0746+2000 B system structure

 LSPM J0746+2000 A
LSPM J0746+2000 B 2.7 AU

More about LSPM J0746+2000 B

       LSPM J0746+2000 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.
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External sources
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Scientific study, Accepted: 29. 12. 2026
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A Spatial Map of the Atmospheric Limb of a Hot Jupiter
Scientific study, Accepted: 14. 10. 2026
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News from this star system

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Image: Periodic transit timing variations measured for Neptune-like planet HAT-P-18 b
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Frequently Asked Questions

How far is the LSPM J0746+2000 B system from the Sun?

The LSPM J0746+2000 B system is 40 light years or 12.4 parsecs from the Sun.

What galaxy is the LSPM J0746+2000 B star in?

The LSPM J0746+2000 B is in the Milky Way galaxy just like the Sun.

How many stars are in the LSPM J0746+2000 B system?

The LSPM J0746+2000 B is a single star, there are no other known stars in the system.

What type of star is the LSPM J0746+2000 B?

The star LSPM J0746+2000 B is a Brown dwarf star.

What temperature is the LSPM J0746+2000 B?

The primary in the LSPM J0746+2000 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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