Physical Size

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Luhman 16 BT-type brown dwarf star
Proxima CentauriM-type red dwarf star

T-type brown dwarf star

Luhman 16 B

A brown dwarf with clouds and weather, too small to shine like a star.
Luhman 16 B is the cooler T-type member of the nearest known brown-dwarf binary system. It is massive enough to glow from its own heat but too light to sustain ordinary hydrogen fusion, with patchy clouds that make its brightness change as it rotates.
diameter
~152,000 km
Mass
~29 Jupiter masses
Composition
Hydrogen, helium, and molecular clouds
Orbits
Luhman 16 binary system

Image: scaleofspace.org · CC BY-NC 4.0

Full object page
Scaleof Space
152,000km