List of smallest known stars

This is a list of the smallest known stars, brown dwarfs and stellar remnants, sorted by increasing size. The list is divided into sublists, and contain notable objects up to 350,000 km in radius, or, as well as all red dwarfs smaller than and all neutron stars with accurately measured radii.

0 to 1,000 km

Partial list containing stars up to 0.0014.

Star name	Star radius, kilometres	Star class	Notes	References
SGR J1935+2154		Magnetar
RX J0720.4−3125	–	Neutron star
LMC X-4		Pulsar
Hercules X-1		Pulsar
Centaurus X-3		Pulsar
Vela X-1		Pulsar
HESS J1731-347		Neutron star	Lightest neutron star ever discovered, at a mass of.
PSR J0348+0432 A		Pulsar	Has a white dwarf companion.
PSR J0437−4715	>11.1	Pulsar	Most stable known natural clock.
GW170817 A		Pulsar
GW170817 B		Pulsar
PSR J1906+0746		Pulsar
RX J1856.5−3754		Neutron star
PSR J2043+1711		Pulsar
PSR J1933-6211		Pulsar
PSR J0952–0607 A		Pulsar	Most massive neutron star so far discovered.
		Neutron star
Vela pulsar		Pulsar
PSR J1614−2230		Pulsar
PSR J0348+0432		Pulsar
PSR J0740+6620		Pulsar
	14	Neutron star	Has a substellar companion orbiting it closely.

1,000 to 50,000 km

Partial list containing stars from 0.0014 to 0.0718.

Star name	Star radius, kilometres	Star radius,	Star class	Notes	References
ZTF J1901+1458	2,140			The most massive white dwarf so far discovered, around 1.3 times more massive than the Sun, close to the mass limit of any white dwarf, and is also a candidate white dwarf pulsar.
RE J0317-853		0.0032		Also among the most massive white dwarfs.
WD1	2,230			An ultramassive white dwarf ejected from the Hyades. At a mass of, it is possibly the most massive known white dwarf consistent with single-star evolution.
T Coronae Borealis		0.0045		Expected to become a nova in the near future, its apparent magnitude may increase up to 2.0.
Janus				A white dwarf with a side of hydrogen and another side of helium.
Wolf 1130 B		0.005		Nearest candidate for a supernova, a type Ia supernova.
HD 49798 B	3,580
BPM 37093
IK Pegasi B		0.006
U Geminorum A
WD 2317+1830
BW Sculptoris
Sirius B				Nearest white dwarf
GRW +70 8247 '
Gamma Cassiopeiae Ab
AN Ursae Majoris	6,300
Gliese 915
LP 658-2
BZ Ursae Majoris A	6,880
AE Aquarii A		0.01		First discovered white dwarf pulsar.
AR Scorpii A	7,000			A white dwarf pulsar. It is often mistaken as the first discovered white dwarf pulsar.
QS Virginis A
YZ Leonis Minoris		0.01
GW Librae
WZ Sagittae
MY Apodis
OY Carinae A		0.011
TMTS J0526+5934 A		0.011
G 99-47	7,650
EX Hydrae		0.011
RX Andromedae
van Maanen 2				Third-closest white dwarf.
Stein 2051 B
G 107-70 B
Ross 548 '
39 Ceti B '		0.012
Mira B '		0.012
WD 1054−226
Gliese 440				Fourth-closest white dwarf.
Procyon B				Second-closest white dwarf.
GD 165 A
Epsilon² Arae C
WD 0806−661 '				Has one confirmed exoplanet.
SW Ursae Majoris
Epsilon Reticuli B	–	0.0129–0.0141
G 29-38
AM Herculis A
40 Eridani B				First white dwarf to be discovered and the fifth-closest one.
TY Coronae Borealis
HD 147513 B
GD 358 '		0.0132
Wolf 489
GALEX J2339−0424
G 107-70 A
Wolf 1346
WD 1032+011 A
Gliese 318
RR Caeli A		0.01568
HL Tau 76		0.0162
PG 1159-035	or	0.0232 or	PG 1159 star	PG 1159 stars are pre-white dwarfs.
WD 2226−210			White dwarf	Located in Helix Nebula
WD 0032−317 A			White dwarf
Feige 55			White dwarf
		0.029	Brown dwarf	with an orbital period of 62 minutes and a dayside surface temperature of, comparable to A-type stars such as Vega and Sirius.
KPD 0005+5106			Pre-white dwarf	Has one unconfirmed exoplanet.
AG Pegasi B		0.06	White dwarf	In a symbiotic binary with AG Peg A, has underwent many mass transfer events, varying in radius, luminosity and temperature.
Regulus Ab			Pre-white dwarf
PSR J0348+0432 B			White dwarf	Orbiting a pulsar.
TMTS J0526+5934 B			Subdwarf B star	Smallest known non-degenerate star.
WISEA 1810−1010			Brown dwarf

50,000 to 125,000 km

Partial list containing stars from 0.0718 to 0.18.

Star name	Star radius, kilometres	Star radius,	Star class	Notes	References
SCR 1845−6357 B			Brown dwarf
DENIS 0255−4700			Brown dwarf	Faintest brown dwarf with a measured visual magnitude.
BE Ursae Majoris A			Subdwarf O star
LP 40-365			White dwarf	A white dwarf that might have formed in a type Iax supernova.
SDSS J1007+1930		~0.078	Brown dwarf	Potential member of the Regulus system, which could be one of the most widely-separated stellar systems. This brown dwarf is at light-years from Regulus.
WD 0032−317 B			Brown dwarf	A highly-irradiated brown dwarf with a dayside temperature hotter than the surface of Sun. Its dayside temperature measures, while its nightside is much cooler, at.
WISE 1534–1043			Brown dwarf	This object has a very fast and unusual transverse velocity, and is believed to be very old and metal-poor to explain such unusual velocity.
Epsilon Indi Ba		0.08–0.081	Brown dwarf
WISE J0623-0456	or	or	Brown dwarf
LHS 6343 C			Brown dwarf
Epsilon Indi Bb		0.082–0.083	Brown dwarf
Wolf 1130 C			Brown dwarf
54 Piscium B			Brown dwarf
Gliese 229 Ba			Brown dwarf
EBLM J0555−57Ab			Red dwarf	Smallest known red dwarf.
Scholz's Star B			Brown dwarf	A nearby star that passed through the Solar System's Oort cloud 80,000 years ago.
			Brown dwarf
GJ 1245 C			Red dwarf
Gliese 229 Bb			Brown dwarf
			Red dwarf	An L2 dwarf that is fusing hydrogen. SSSPM J0829−1309 is one of the least luminous and massive hydrogen-fusing stars, and is smaller than Jupiter.
HD 63754 B	–	0.0884–0.0976	Brown dwarf	Among the most massive brown dwarfs.
HD 72946 B		0.0884	Brown dwarf
Gliese 570 D			Brown dwarf
2MASS 0243−2453	–	0.092–0.106	Brown dwarf
2MASS J0348−6022			Brown dwarf
WISE 0146+4234 A			Brown dwarf
Kelu-1 B	to	to	Brown dwarf
SCR 1845−6357 A			Red dwarf
WISE 0146+4234 B			Brown dwarf
SDSS J1416+1348 A			Brown dwarf
Kelu-1 A	to	to	Brown dwarf
47 Ophiuchi C			Brown dwarf
2MASS 0937+2931			Brown dwarf
2MASS J1047+21			Brown dwarf
CoRoT-15b			Brown dwarf
SDSS J1416+1348 B			Brown dwarf
WISE 0359−5401			Brown dwarf
TVLM 513-46546			Brown dwarf	Has one confirmed exoplanet.
CWISEP J1935-1546			Brown dwarf
C			Brown dwarf
WISE 2150−7520 B			Brown dwarf
LHS 1070 C		0.098	Brown dwarf	Certainly a brown dwarf based on its mass.
WASP-30B			Brown dwarf
WASP-128B			Brown dwarf
HD 33632 Ab		0.0997	Brown dwarf
2MASS J0407+1546			Brown dwarf
2MASS J1219+3128			Brown dwarf
HD 114762 B			Red dwarf
R Aquarii B	>	>0.1	White dwarf	Makes a symbiotic binary with its companion R Aquarii A, a red giant.
EBLM J0954−23			Red dwarf
KOI-189 B	–	0.1013–0.1032	Red dwarf
Scholz's Star A			Red dwarf	A nearby star that passed through the Solar System's Oort cloud 80,000 years ago.
Gliese 569 Bb			Brown dwarf	First brown dwarf ever discovered, together with its companion Gliese 569 Ba, which were thought to be a single astronomical body at the time.
Luhman 16 A			Brown dwarf	Nearest brown dwarfs to Earth.
Luhman 16 B			Brown dwarf	Nearest brown dwarfs to Earth.
HD 28736 B			Brown dwarf
15 Sagittae B	71,492		Brown dwarf
GD 165 B	71,492		Brown dwarf
LHS 1070 B		0.104	Brown dwarf	Likely a brown dwarf based on its mass.
WD 1032+011 B			Brown dwarf	A brown dwarf orbiting a white dwarf with an extremely low orbital period of, both being tidally locked to each other.
WISE 2150-7520 A			Brown dwarf
BW Sculptoris B			Brown dwarf
Ross 614 B		~	Red dwarf
LHS 2924		0.107	Red dwarf	Was the smallest known star at its discovery.
DENIS J1048−3956		0.108	Red dwarf
VZ Piscium B			Red dwarf	Also called NLTT 56936 B or HIP 115819 B.
WISE 0607+2429			Brown dwarf
ESO 207-61			Brown dwarf	One of the first brown dwarfs to be identified.
Kepler-39b			Brown dwarf	Kepler-39 rotates rapidly with a rotation period of 1.6 hours and hence has an oblate shape, with its equator length being 22% larger than the poles.
CoRoT-3b			Brown dwarf
TOI-2119 B			Brown dwarf
2MASS 1237+6526			Brown dwarf	Has one unconfirmed exoplanet.
LHS 2065			Red dwarf
WISE J004945.61+215120.0			Brown dwarf
2MASS J0523−1403			Red dwarf
KELT-1B			Brown dwarf
LHS 292			Red dwarf	Not to be confused with LHS 2924
WISE 1405+5534			Brown dwarf
vB 10			Red dwarf
2M1540		0.119	Red dwarf
EI Cancri B			Red dwarf
Gliese 569 Ba			Brown dwarf	First brown dwarf ever discovered, together with its companion Gliese 569 Bb, which were thought to be a single astronomical body at the time.
TRAPPIST-1			Red dwarf	Hosts a planetary system with seven confirmed planets.
OGLE-TR-122B			Red dwarf	Was the smallest known star from 2005 to 2013.
Teegarden's Star			Red dwarf	Has three confirmed exoplanets.
G 196-3 B			Brown dwarf
Königstuhl 1 B			Brown dwarf
vB 8			Red dwarf
LS IV-14 116		0.122	Subdwarf B star
SPECULOOS-3			Red dwarf	Has one confirmed exoplanet.
2MASS 0122-2439 B			Red dwarf
DX Cancri			Red dwarf
LHS 2090			Red dwarf
VHS J1256–1257b		0.125	Brown dwarf
LHS 288			Red dwarf
Gliese 412 B			Red dwarf
OY Carinae B		0.127	Red dwarf
AZ Cancri			Red dwarf
AS Leonis Minoris B	–	0.13–0.51	White dwarf or Subdwarf B star	AS Leonis Minoris is an eclipsing binary system made up of a luminous red giant and a hot companion. It has the longest period of any known eclipsing binary at 69 years.
GJ 1245 B			Red dwarf
Gliese 623 B			Red dwarf
Gliese 105 C			Red dwarf
Teide 1			Brown dwarf	First brown dwarf to be confirmed.
EI Cancri A			Red dwarf
Alpha Trianguli B			Red dwarf
LHS 1070 A		0.14	Red dwarf
HD 149382		0.143	Subdwarf B star
EZ Aquarii A '			Red dwarf
EZ Aquarii B '			Red dwarf
Wolf 359			Red dwarf	Fifth-nearest star system to Earth.
DENIS-P J1058.7−1548			Brown dwarf
GJ 1245 A			Red dwarf
LP 944-20			Brown dwarf	Among the brightest brown dwarfs.
Wolf 424 A			Red dwarf
NY Virginis A			Subdwarf B star
EX Hydrae B		0.1513	Red dwarf
GJ 1061			Red dwarf	Has three confirmed exoplanets.
Wolf 424 B			Red dwarf
Proxima Centauri			Red dwarf	The nearest extrasolar star. Has one confirmed planet, one candidate, and one disputed
85 Pegasi Bb		0.155	Red dwarf
Gliese 65 B '			Red dwarf	The Gliese 65 system may host a Neptune-mass planet.
NY Virginis B		0.16	Red dwarf
GL Virginis			Red dwarf
TZ Arietis '			Red dwarf	Has one confirmed exoplanet.
2M1510 Aa		0.16185	Brown dwarf	The system has a candidate planet that orbits on a polar orbit around 2M1510AB, making this planet the first planet discovered orbiting polar around a binary system.
2M1510 Ab		0.16185	Brown dwarf	The system has a candidate planet that orbits on a polar orbit around 2M1510AB, making this planet the first planet discovered orbiting polar around a binary system.
Gliese 65 A			Red dwarf	The Gliese 65 system may host a Neptune-mass planet.
Kepler-451 B			Red dwarf
YZ Ceti			Red dwarf
HR 858 B			Red dwarf
LP 791-18			Red dwarf	Has three confirmed exoplanets.
UY Sextantis			Subdwarf B star
Z Andromedae B	to	to	White dwarf	Makes a symbiotic binary with its companion Z Andromedae A, a red giant.
HIP 81208 Cb			Brown dwarf
AB Doradus C		0.178	Red dwarf	Among the least massive stars confirmed.
Gliese 22 B			Red dwarf

125,000 to 200,000 km

Partial list containing stars from 0.18 to 0.287.

Star name	Star radius, kilometres	Star radius,	Star class	Notes	References
Groombridge 34 B '			Red dwarf
HW Virginis A			Subdwarf B star
HU Delphini A			Red dwarf
Gliese 29 B			Red dwarf
GJ 3323			Red dwarf	Has two confrirmed exoplanets.
Barnard's Star			Red dwarf	Second-nearest star system to the Solar System. The star with the highest proper motion. Has three confirmed exoplanets.
Alpha Mensae B			Red dwarf
GJ 1128			Red dwarf
Ross 248 '		0.19	Red dwarf
Ross 128 '			Red dwarf	Has one confirmed exoplanet.
Ross 154 '			Red dwarf
GJ 1062			Red subdwarf	Another size estimates include and.
Kepler-70			Subdwarf B star
Kepler-451 A			Subdwarf B star	Possibly has two exoplanets.
RR Caeli B			Red dwarf
GJ 1214			Red dwarf	Has one confirmed exoplanet.
LHS 1140			Red dwarf	Has two confirmed exoplanets.
Krüger 60 B			Red dwarf
Ross 508			Red dwarf	Has one confirmed exoplanet.
GJ 1132			Red dwarf
QY Aurigae A			Red dwarf
QY Aurigae B			Red dwarf
Kepler-16 B			Red dwarf	Has one confirmed exoplanet.
Fomalhaut C			Red dwarf
V391 Pegasi		0.23	Subdwarf B star	Has one unconfirmed exoplanet.
Gliese 777 B			Red dwarf
Kepler-1649			Red dwarf	Has two confirmed exoplanets.
			Brown dwarf
			Red dwarf
Ross 47			Red dwarf
Kepler-429		0.24	Subdwarf B star	Has three unconfirmed exoplanets.
2M1207 A			Brown dwarf
PZ Telescopii B			Brown dwarf
CM Draconis A			Red dwarf
DG Canum Venaticorum A		0.253	Red dwarf
Ross 614 A			Red dwarf
Gliese 625		0.255	Red dwarf
Gliese 12			Red dwarf	Has one confirmed exoplanet.
HIP 79098 B			Brown dwarf
BX Trianguli B			Red dwarf	Has one confirmed exoplanet.
V846 Arae B			Subdwarf O star
Mu Herculis C			Red dwarf
40 Eridani C			Red dwarf
Struve 2398 B			Red dwarf
Gliese 402			Red dwarf
GJ 3991			Red dwarf

200,000 to 275,000 km

Partial list containing stars from 0.29 to 0.395 solar radii.

Star name	Star radius, kilometres	Star radius,	Star class	Notes	References
Gliese 105 B			Red dwarf
CoRoT-7 B		0.29	Red dwarf
Mu Cassiopeiae Ab		0.29	Red dwarf
AP Columbae			Red dwarf	The nearest pre-main sequence star to Earth.
Kapteyn's Star '			Red subdwarf	Closest halo star to the Sun. Previously believed to host an ancient planetary system with potential habitable planets.
Stein 2051 A			Red dwarf
HN Librae			Red dwarf	Has one confirmed exoplanet.
3 Puppis B		0.3	Hot subdwarf	This star is losing mass to the blue supergiant 3 Puppis A, this mass transfer generates a disk of circumstellar dust around the supergiant, which is unusual for an A-type star.
LS Muscae B	~		Subdwarf O star
Krüger 60 A			Red dwarf
Gliese 581			Red dwarf
L 98-59			Red dwarf	Has four confirmed exoplanets and one unconfirmed.
EQ Pegasi B			Red dwarf
Luyten's Star '			Red dwarf	Has two confirmed exoplanets and two unconfirmed.
Wolf 1061			Red dwarf	Has three confirmed exoplanets.
GJ 3929			Red dwarf	Has two confrirmed exoplanets.
Xi Ursae Majoris Ab		0.32	Red dwarf
Gliese 486 '			Red dwarf	Has one confirmed exoplanet.
YZ Canis Minoris			Red dwarf
LHS 1678			Red dwarf	Has three confirmed exoplanets.
Regulus C			Red dwarf
AM Herculis B		0.33	Red dwarf
Wolf 1130 A		0.33	Red dwarf	Nearest candidate for a supernova, a type Ia supernova.
EV Lacertae			Red dwarf	On 25 April 2008, a record-setting stellar flare was observed on its surface by NASA's Swift, that was thousands of times more powerful than any solar flare.
Gliese 357		0.333	Red dwarf	Has three confirmed exoplanets.
Gliese 667 C			Red dwarf
Aldebaran B			Red dwarf
Struve 2398 A '			Red dwarf	Has one confirmed exoplanet.
Gliese 251			Red dwarf
Ross 458 A			Red dwarf	Has one confirmed exoplanet.
2MASS 0122–2439 A			Red dwarf
Furuhjelm 46 B			Red dwarf
Furuhjelm 46 A			Red dwarf
Innes' star			Red dwarf
Gliese 876 '			Red dwarf	Has four confirmed exoplanets. First red dwarf known to host exoplanets.
LHS 6343 A			Red dwarf
LTT 3780			Red dwarf	Has two confirmed exoplanets.
Gliese 22 C			Red dwarf
TOI-270			Red dwarf
Gliese 1			Red dwarf
13 Ceti Ab		0.38	Red dwarf
GQ Lupi B			Brown dwarf
'			Red dwarf
Gliese 412 A			Red dwarf
Lalande 21185			Red dwarf
Gliese 22 B		0.394	Red dwarf
LHS 6343 B			Red dwarf

275,000 to 350,000 km

Partial list containing stars from 0.395 to 0.5 solar radii.

Star name	Star radius, kilometres	Star radius,	Star class	Notes	References
Gliese 570 C			Red dwarf
Asellus Primus B '			Red dwarf
GJ 3293			Red dwarf
Gliese 623 A			Red dwarf
Gliese 908 '			Red dwarf
EQ Pegasi A			Red dwarf	Has one confirmed exoplanet.
Gliese 163			Red dwarf
SDSS J001820.5−093939.2			F-type star	Among the most metal-poor stars.
Gliese 806			Red dwarf	Has three confirmed exoplanets.
Gliese 317			Red dwarf	Has two confirmed exoplanets.
Gliese 687		0.4187	Red dwarf
QS Virginis B			Red dwarf
TOI-700			Red dwarf
Gliese 180			Red dwarf	Has two confirmed exoplanets and one unconfirmed.
AD Leonis			Red dwarf
Gliese 686			Red dwarf
GJ 3634			Red dwarf	Has one confirmed exoplanet.
		0.43	Red dwarf
U Geminorum B			Red dwarf
Gliese 436			Red dwarf	Has one confirmed exoplanet.
Gliese 393			Red dwarf
Sigma Coronae Borealis C			Red dwarf
Kappa¹ Apodis B			Subdwarf O star
WR 93b		0.44
Gliese 832			Red dwarf
Alpha Caeli B		0.45	Red dwarf
Gliese 367 '			Red dwarf
Gliese 588			Red dwarf
Iota Ursae Majoris C		0.46	Red dwarf
Gliese 849			Red dwarf
BAT99-123 '		0.47	Wolf-Rayet
Gliese 176			Red dwarf
Lacaille 9352			Red dwarf
Tau Boötis B			Red dwarf
Gliese 752 A			Red dwarf
UScoCTIO 108 A		0.484	Brown dwarf
Gliese 526			Red dwarf
UX Ursae Majoris B	–		Red dwarf
Theta Persei Ab			Red dwarf
GJ 3470			Red dwarf
Gliese 22 A	~	~0.5	Red dwarf
Kappa Reticuli B		0.50	Red dwarf
TOI-2119			Red dwarf

Smallest stars by type

Type		Radius	Radius	Radius	Radius	Date	Notes	References
Red dwarf	EBLM J0555−57Ab	0.084	0.84	9.41		2017	The red dwarf stars are considered the smallest stars known, and representative of the smallest star possible.
Brown dwarf		0.029	0.282	3.16		2022	Brown dwarfs are not massive enough to build up the pressure in the central regions to allow nuclear fusion of hydrogen into helium. They are best described as extremely massive gas giants that were not able to ignite into a hydrogen-fusing star.
White dwarf	ZTF J1901+1458	0.0031	0.030	0.34		2021	White dwarfs are stellar remnants produced when a star with around 8 solar masses or less sheds its outer layers into a planetary nebula. The leftover core becomes the white dwarf. It is thought that white dwarfs cool down over quadrillions of years to produce a black dwarf.
Neutron star		0.00000646830.0000077332	0.000062940.00007525	0.00070550.0008435	–	2012	Neutron stars are stellar remnants produced when stars with around 9 solar masses or more explode in supernovae at the ends 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.

Timeline of smallest red dwarf star recordholders

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.

Date	Radius	Radius	Radius km	Notes
	0.084	0.84		This star has a size comparable to that of Saturn.
	0.102	1.01		Lowest mass main sequence star as of 2020.
	0.117	1.16