Star Sizes - Biggest Known Stars In Universe

Today we are sharing about the information about the biggest known stars in the Universe

Source: En.wikipedia.org

Source: spaceanswers.com

List of the largest stars

Star name	Solar radii (Sun = 1)	Notes
UY Scuti	1,708[2]	Error in size determination: ±192 solar radii. At the smallest, it would have a size 4 Solar radii smaller than VX Sagittarii.
NML Cygni	1,650[3]
WOH G64	1,540[4]	This would be the largest star in the LMC, but is unusual in position and motion and might still be a foreground halo giant.
Westerlund 1-26	1,530-1,580[5](–2,544)[6][7]	Very uncertain parameters for an unusual star with strong radio emission. The spectrum is variable but apparently the luminosity is not.
VX Sagittarii	1,520[8]	VX Sgr is a pulsating variable with a large visual range and varies significantly in size.
KY Cygni	1,420–2,850 [9]	The upper estimate is due to an unusual K band measurement and thought to be an artifact of a reddening correction error. The lower estimate is consistent with other stars in the same survey and with theoretical models.
VY Canis Majoris	1,420	Once thought to be a star so large that it contradicted stellar evolutionary theory, improved measurements have brought it down to size.[10][11]
AH Scorpii	1,287-1,535[2]	AH Sco is variable by nearly 3 magnitudes in the visual range, and an estimated 20% in total luminosity. The variation in diameter is not clear because the temperature also varies.
RW Cephei	1,260–1,610[citation needed]	RW Cep is variable both in brightness (by at least a factor of 3) and spectral type (observed from G8 to M), thus probably also in diameter. Because the spectral type and temperature at maximum luminosity are not known, the quoted sizes are just estimates.
PZ Cassiopeiae	1,190-1,940[9]1,260-1,340[12]	The largest estimate is due to an unusual K band measurement and thought to be an artifact of a reddening correction error. The lowest estimate is consistent with other stars in the same survey and with theoretical models, and the intermediate ones have been obtained refining the distance to this star, and thus its parameters.
VV Cephei A	1,050–1,900	VV Cep A is a highly distorted star in a close binary system, losing mass to the secondary for at least part of its orbit.
HR 5171 A	1,056–1,575[13]	HR 5171 A is a highly distorted star in a close binary system, losing mass to the secondary.
KW Sagittarii	1,009[2]-1,460[9]
Mu Cephei(Herschel's "Garnet Star")	650[14]-1,420[9]
BI Cygni	916[8]-1,240[9]
V354 Cephei	690[8]-1,520[9]
S Persei	780-1,230[9]	In the Perseus Double Cluster
BC Cygni	1,140[9]
RT Carinae	1,090[9]
V396 Centauri	1,070[9]
CK Carinae	1,060[9]
V1749 Cygni	620-1,040[9]
RS Persei	1,000[9]	In the Perseus Double Cluster
NR Vulpeculae	980[9]
RW Cygni	980[9]
Betelgeuse(Alpha Orionis)	950[15]
Antares A(Alpha Scorpii A)	883
V602 Carinae	860[9]
TZ Cassiopeiae	800[9]
IX Carinae	790[9]
SU Persei	780[9]	In the Perseus Double Cluster
TV Geminorum	770[9]
V355 Cepheus	300[8]-770[9]
V382 Carinae	700	Yellow hypergiant, one of the rarest types of star.
The following well-known stars are listed for the purpose of comparison.
CE Tauri ("Ruby Star")[16]	608	Can be occulted by the Moon, allowing accurate determination of its apparent diameter.
Alpha Herculis(Ras Algethi)	460
Rho Cassiopeiae	450	Yellow hypergiant
Mira A (Omicron Ceti)	400[17]	Prototype Mira variable
V838 Monocerotis	380	Once topped to the list as one of the largest known stars, after experiencing a nova outburst it gradually decreased in size
The Pistol Star	306	Blue hypergiant, among the most massive and luminous stars known.
S Doradus	100-380	Prototype S Doradus variable
La Superba (Y Canum Venaticorum)	215	One of the coolest and reddest known stars.
Deneb (Alpha Cygni	203
Eta Carinae(Tseen She)	85–195[18]	Previously thought to be the most massive single star, but in 2005 it was realised to be a binary system
Peony Nebula Star	100	Candidate for most luminous star in the Milky Way.
Rigel A (Beta Orionis A)	78
Canopus (Alpha Carinae)	65	Second brightest star in the night sky.
Aldebaran(Alpha Tauri)	44.2[19]
R136a1	35.4	Also on record as the most massive and luminous star known.
HDE226868	20-22	The supergiant companion of black hole Cygnus X-1. The black hole is 500,000 times smaller than the star.
VV Cephei B	10

Source: En.wikipedia.org