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NLTT 5306 B
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Star NLTT 5306 B

Brown dwarf NLTT 5306 B is located 258 light years away from the Sun. It is a single star of spectral class L5 D, that has 5 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
258 light years
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NLTT 5306 B

Brown dwarf
Spectral class: L5 D

Location +

Distance iconDistance from the primary: 0.00263 AU

Basic characteristic

icon weight
Mass: 5.3 % M Sun
| 56 M Jupiter
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Star mass
Mass of the star NLTT 5306 B is 0.053 solar masses (or 55.5 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
| 1.1 R Jupiter
(estimate)
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Star size
Radius of the star NLTT 5306 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: 1600 K
 (estimate)
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Star temperature
Surface temperature of NLTT 5306 B is estimated to be 1605 K, which is 28 % 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): -4.5
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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NLTT 5306 B system structure

 NLTT 5306 A
NLTT 5306 B 0.00263 AU

More about NLTT 5306 B

       NLTT 5306 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
icon study
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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

Atmospheric composition of hot Jupiter KELT-2A b reveals chemical history
iconToday
Image: Atmospheric composition of hot Jupiter KELT-2A b reveals chemical history
New observations of hot Jupiter KELT-2A b confirm water vapor in its atmosphere. The planet shows a carbon-to-oxygen ratio similar to its host star but with overall lower metallicity, suggesting a complex migration history from far out in its star system....
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Periodic transit timing variations measured for Neptune-like planet HAT-P-18 b
iconToday
Image: Periodic transit timing variations measured for Neptune-like planet HAT-P-18 b
New observations from the James Webb Space Telescope show periodic transit timing variations in the Neptune-like planet HAT-P-18 b. The data indicates an orbital timing shift of 92.9 seconds, providing fresh insights into the dynamics of this distant system....
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Orbital and atmospheric evolution of the mini-Neptune TOI-2257 b
iconToday
Image: Orbital and atmospheric evolution of the mini-Neptune TOI-2257 b
The exoplanet TOI-2257 b orbits its star once every 35 days with a high eccentricity. New models suggest its atmospheric and orbital fate depends on whether it is a gas-rich mini-Neptune or a rocky super-Earth. Higher eccentricity would confirm a gaseous nature....
Read article tag icon

Frequently Asked Questions

How far is the NLTT 5306 B system from the Sun?

The NLTT 5306 B system is 258 light years or 79.2 parsecs from the Sun.

What galaxy is the NLTT 5306 B star in?

The NLTT 5306 B is in the Milky Way galaxy just like the Sun.

How many stars are in the NLTT 5306 B system?

The NLTT 5306 B is a single star, there are no other known stars in the system.

What type of star is the NLTT 5306 B?

The star NLTT 5306 B is a Brown dwarf star.

What temperature is the NLTT 5306 B?

The primary in the NLTT 5306 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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