List of least voluminous stars

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This is a list of stars which are the least voluminous known (the smallest stars by volume).

List

This list is incomplete; you can help by expanding it.
Star name Radius
Solar radii
(Sun = 1)		 Radius
Jupiter radii
(Jupiter = 1)		 Notes
Sirius B 0.00874 0.0874 [1]
Procyon B 0.01235 0.1235 [2]

Smallest by type

List of the smallest stars by star type
Type Star name Radius
Solar radii
(Sun = 1)		 Radius
Jupiter radii
(Jupiter = 1)		 Radius
Earth radii
(Earth = 1)		 Radius
(km / mi)		 Date Notes
Red dwarf 2MASS J0523-1403 0.086 .896 9.39 2013 This red dwarf is considered the smallest star known, and representative of the smallest star possible, which is not a brown dwarf or a dead star. [3]
Brown dwarf
White dwarf A.C.+70°8247 0.00000150734 0.00157316804 0.5 1934 [4]
Neutron star
Stellar-mass black hole XTE J1650-500 B 24 km (15 mi) 2008 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 MSun in the microquasar system GRO J1655-40. [5]

Smallest active stars

This is a listing of the smallest stars that are incontrovertibly stars that are still alive and fusing. Hence they are the smallest red dwarfs known, and those brown dwarfs that are known to be still in their short actively fusing phase.

List of the smallest live stars
Star name Radius
Solar radii
(Sun = 1)		 Radius
Jupiter radii
(Jupiter = 1)		 Type Notes
SSSPM J0829-1309 0.088 .917 Red dwarf [6]
OGLE-TR-122B 0.120 1.16 Red dwarf This was once the smallest known actively fusing star, when found in 2005, through 2013. It is the smallest eclipsing red dwarf, and smallest observationally measured diameter. [7][8][9]
Proxima Centauri 0.145 1.510 Red dwarf This is the nearest neighbouring star to the Sun. [9][10]
Barnard's Star 0.196 2.042 Red dwarf [9][10]
CM Draconis B 0.2396 2.496 Red dwarf Part of the binary red dwarf system CM Draconis [9][11]
CM Draconis A 0.2534 2.640 Red dwarf Part of the binary red dwarf system CM Draconis [9][11]
Kapteyn's Star 0.291 3.031 Red dwarf This is the closest halo star to the Sun. [9][10]
Timeline of smallest live star recordholders
Star name Date Radius
Solar radii
(Sun = 1)		 Radius
Jupiter radii
(Jupiter = 1)		 Type Notes
2MASS J0523-1403 2013— 0.086 .896 Red dwarf This red dwarf is considered the smallest star known, and representative of the smallest star possible that is not a brown dwarf. [3][6]
OGLE-TR-122B 2005-2013 0.120 1.16 Red dwarf This is the smallest eclipsing red dwarf, and smallest observationally measured diameter. [7][8][9]

References

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  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ name="Levesque2009"
  3. ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ 8.0 8.1 Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ 10.0 10.1 10.2 Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ 11.0 11.1 Lua error in package.lua at line 80: module 'strict' not found.
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