List of smallest stars

Category:Lists of stars
This is an incomplete list of the smallest known stars. Most of the stars in this list are within the Milky Way except BAT99-123 (near the end of the list), which is in the Large Magellanic Cloud.

Smallest stars are mostly red dwarfs, brown dwarfs, white dwarfs and neutron stars. 

1 solar radius (radius of the Sun) = 695700 km

+Star nameStar radius 
(in solar radii)Star typeNotesRX J0720.4-31250.000007187Neutron star4U 1820-300.00001308035PulsarPSR B1257+120.00001437401PulsarCoolest neutron star known. Orbited by 3 exoplanets.Crab Pulsar0.00001437401PulsarA very young neutron star (went supernova in 1054 AD)Geminga0.00001437401PulsarPSR B0943+100.00001437401PulsarHottest neutron star knownXTE J1739-2850.00001566767Neutron star or quark starVela Pulsar0.00001799626PulsarPSR J0348+0432 A0.00001868621PulsarPSR J1748-2446ad0.00002299841PulsarFastest rotating neutron star knownPSR B1620-26 A0.00003737243PulsarOrbited by one of the oldest exoplanets knownHD 497980.0023White dwarfOne of the hottest white dwarfs known,GRW+70 82470.0047White dwarfBPM 370930.0057White dwarfIK Pegasi B0.006White dwarfOne of the closest stars to Earth that can possibly become a Type Ia supernova.Sirius B0.0079White dwarfClosest known white dwarfEarth (for comparison)0.00916Rocky planetReported for referenceAR Scorpii0.01White dwarfOnly known white dwarf pulsarDN Draconis0.01White dwarfVan Maanen 20.011White dwarfProcyon B0.0124White dwarfESO 439-260.0126White dwarfLeast luminous white dwarf knownWD 1145+0170.02White dwarfNGC 3132 Central Star0.0323Proto-white dwarfHas an A-type star companion.KPD 0005+51060.055White dwarfOne of the hottest white dwarfs knownPSR J0348+0432 B0.0651White dwarfTMTS J052610.43+593445.10.0659B type subdwarfSmallest known non-degenerate star.[MCG2003] Sex A PN 1 Central Star0.079O type subdwarfCWISE J124909.08+362116.00.08Brown dwarf or red dwarfA hypervelocity star.Epsilon Indi Ba0.08Brown dwarfEpsilon Indi Bb0.082Brown dwarfLuhman 16A0.085Brown dwarfNearest brown dwarf system to the Sun.EBLM J0555-57Ab0.0862Red dwarfCommonly known as the lower limit for main sequence stars.SSSPM J0829-13090.088Red dwarfWISE 0855-07140.09Brown dwarfThe coolest star known (temperature very similar to Earth).2MASS 0939-24480.09Brown dwarfSCR 1845-6357 B0.096Brown dwarfSCR 1845-6357 A0.096Red dwarfJupiter (for comparison)0.1Gas giant planetReported for referenceCoRoT-3b0.1Brown dwarfHD 114762 B0.1Red dwarfR Aquarii B0.1White dwarf2MASS J0523-14030.101Red dwarfCoolest and least massive main sequence star knownLHS 29240.103Red dwarfLuhman 16B0.104Brown dwarfNearest brown dwarf system to the Sun.2MASS J04285096-22532270.1095Red dwarfDX Cancri0.11Red dwarfLHS 2920.11Red dwarfTVLM 513-465460.11Red dwarfGliese 229B0.112Brown dwarfOGLE-TR-122B0.116Red dwarfVB 100.1183Red dwarfTRAPPIST-10.1192Red dwarfOrbited by at least 7 confirmed Earth-sized rocky exoplanets, at least 3 are potentially habitable. Teegarden's star0.12Red dwarfHas 2 potentially habitable exoplanets.LHS 20900.12Red dwarfVB 80.1214Red dwarfSPECULOOS-30.123Red dwarfCFBDSIR 1458+10B0.13Brown dwarfTeide 10.13Brown dwarfGliese 412B0.13Red dwarfWolf 3590.145Red dwarfNN Serpentis B0.15Red dwarfCFBDSIR 1458+10A0.15Brown dwarfProxima Centauri0.1542Red dwarfClosest star to Sun.UV Ceti0.16Red dwarfBL Ceti0.167Red dwarfYZ Ceti0.168Red dwarfUY Sextantis0.17B type subdwarfA B type subdwarf star is a star with temperatures similar to B type main sequence stars but are significantly smaller and less luminous.Cha 110913-7734440.18Brown dwarfOne of the least massive stars knownHW Virginis0.183B type subdwarfBarnard's star0.187Red dwarfRoss 2480.19Red dwarfWill become closest star to Sun about 35000 years laterRoss 1280.1967Red dwarfRoss 1540.2Red dwarfKepler-700.2B type subdwarfWolf 2270.2Red dwarfRR Caeli0.203Red dwarfGliese 12140.204Red dwarfLHS 11400.2055Red dwarfCT Chamaeleontis B0.22Brown dwarfOne of the least massive stars knownNGC 5882 Central Star0.227Proto-white dwarfFomalhaut C0.23Red dwarfOTS 440.23Brown dwarfOne of the least massive stars knownCM Draconis B0.2396Red dwarf2M1207A0.25Brown dwarfCM Draconis A0.2529Red dwarfDG Canum Venaticorum0.2529Red dwarf55 Cancri B0.27Red dwarfKapteyn's star0.29Red dwarfGliese 5810.3Red dwarfWolf 10610.319Red dwarfGliese 10.33Red dwarfLuyten's star0.35Red dwarfKruger 60A0.35Red dwarfStruve 2398A0.354Red dwarfZ Andromedae B0.36White dwarfLargest and most luminous white dwarf knownEV Lacertae0.36Red dwarfAT Microscopii B0.37Red dwarfRegulus C0.37Red dwarfGroombridge 34A0.38Red dwarfLalande 211850.393Red dwarfAT Microscopii A0.41Red dwarfAD Leonis0.423Red dwarfGliese 4360.432Red dwarfWR 93b0.44Wolf-rayet starBAT99-1230.47Wolf-rayet starLocated in the Large Magellanic CloudLacaille 93520.473Red dwarfKepler-1 B0.5Red dwarfSun (for comparison)1G type main sequence starReported for reference