Lowest mass main sequence star as in 2020. This star has a size comparable to that of Saturn. List of smallest red dwarf titleholders Star name Red dwarfs are considered the smallest star known that are active fusion stars, and are the smallest stars possible that is not a brown dwarf. Timeline of smallest red dwarf star recordholders PSR B0943+10 is one of the least massive stars with 0.02 solar masses.īlack holes are stellar remnants usually produced when extremely massive stars explode in a supernova or hypernova at the end of their lives. They are usually produced by stars with less than 20 solar masses, although a more massive star may produce a neutron star in certain cases. Neutron stars are stellar remnants produced when stars with around 9 solar masses or more explode in supernovae at the ends of their lives. It is thought that white dwarfs cool down over quadrillions of years to produce a black dwarf. The leftover core becomes the white dwarf. White dwarfs are stellar remnants produced when a star with around 8 solar masses or less sheds its outer layers into a planetary nebula. They are best described as extremely massive gas giants that were not able to ignite into a hydrogen-fusing star. The red dwarf stars are considered the smallest stars known, and representative of the smallest star possible.īrown dwarfs are not massive enough to build up the pressure in the central regions to allow nuclear fusion of hydrogen into helium. Smallest stars by type List of the smallest stars by star type Type Has two confirmed exoplanets and other two unconfirmed This is the closest halo star to the Sun. ![]() This is the nearest neighbouring star to the Sun. Hosts a planetary system with at least seven rocky planets. It is the smallest eclipsing red dwarf, and smallest observationally measured diameter. This was once the smallest known actively fusing star, when found in 2005, through 2013. Luhman 16 B and Luhman 16 A are the closest brown dwarf stars to Earth. Similarly to 2MASS J0523-1403, SSSPM J0829-1309 is one of the least luminous and massive hydrogen-fusing stars, and is smaller than Jupiter.Īs in 2019, with mass 67.54 ☑2.79 M J (0.0523-0.0767 M ☉) is the lowest known mass hydrogen-burning star. Luhman 16 A and Luhman 16 B are the closest brown dwarf stars to Earth.Īn L2 dwarf that is fusing hydrogen. Although its mass is comparable to that of TRAPPIST-1, its radius is 1/3 smaller. As of 2019, it is the second lightest hydrogen-fusing star known, marginally heavier (0.0777-0.0852 M ☉) than the 2MASS J0523-1403. This red dwarf has a size comparable to that of the planet Saturn. Host star of one of the smallest exoplanets.Ī white dwarf that orbits its pulsar companion (see above) Historically first detected white dwarf star One of the smallest white dwarf stars known. This binary X-ray transient system, XTE J1650-500, component black hole, at 3.8 solar masses, is smaller than the previous recordholder GRO J1655-40 B of 6.3 M Sun in the microquasar system GRO J1655-40. Orbited by a white dwarf star (see below) Relatively young at 999 years old as of June 2023. PSR B0943+10 is one of the least massive stars, with 0.02 solar masses. They are usually produced by stars of less than 20 solar masses, although a more massive star may produce a neutron star in certain cases. Neutron stars are stellar remnants produced when a star of around 8–9 solar masses or more explodes in a supernova at the end of its life. This is a list of small stars that are notable for characteristics that are not separately listed. ![]() This list is incomplete you can help by adding missing items.
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