List of largest stars: Difference between revisions

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*The distances to most of these stars are uncertain to differing degrees and this uncertainty affects the size measurements.
 
*The distances to most of these stars are uncertain to differing degrees and this uncertainty affects the size measurements.
 
*Several large stars have extended atmospheres, are embedded in mostly opaque dust shells or disks, and pulsate, such that determining their radii is not well defined.
 
*Several large stars have extended atmospheres, are embedded in mostly opaque dust shells or disks, and pulsate, such that determining their radii is not well defined.
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ah ==
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ah is the lord of gay
   
 
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Revision as of 13:56, 1 March 2010

Below is a list of the largest known stars by radius (half of the diameter). The unit of measurement used is the radius of the Sun (approximately 695,500 kilometers, or 432,450 miles).

The exact order of this list is not complete yet, nor is it completely well defined:

  • Double stars here are sometimes treated individually, while other lists may combine them.
  • There are statistical variations in measured values and sometime high uncertainties in derived values.
  • The distances to most of these stars are uncertain to differing degrees and this uncertainty affects the size measurements.
  • Several large stars have extended atmospheres, are embedded in mostly opaque dust shells or disks, and pulsate, such that determining their radii is not well defined.


== ah == ah is the lord of gay

List of the largest stars
Star name Solar radii
(Sun = 1)
VY Canis Majoris 1800 to 2100[1]
WOH G64 1738[2]
VV Cephei A 1600 to 1900[citation needed]
Mu Cephei (Herschel's "Garnet Star") 1224[3] or 1450 to 1650[4]
V354 Cephei 1520[citation needed]
RW Cephei 1260 to 1610[citation needed]
KW Sagittarii 1460[citation needed]
KY Cygni 1420 or 1440[citation needed]
Betelgeuse (Alpha Orionis) 950 to 1000[5] or 880 to 988[6]
Antares (Alpha Scorpii) 800[citation needed]
V838 Monocerotis 800[citation needed]
V382 Carinae 747[3]
S Pegasi 580 [3]
T Cephei 540 [4]
S Orionis 530 [5]
W Hydrae 520 [6]
119 Tauri (Ruby Star)[7] 510 [7]
R Cassiopeiae 500 [8]
Delta Canis Majoris (Wezen) 482
Chi Cygni 470 [9]
Alpha Herculis (Ras Algethi) 460
Rho Cassiopeiae 450
Mira A (Omicron Ceti) 400 [10]
V509 Cassiopeiae 400[8] to 900[3]
S Doradus 100–380[9]
R Doradus 370
HR Carinae 350
R Leonis 350 [11]
The Pistol Star 340
La Superba (Y Canum Venaticorum) 300
Deneb (Alpha Cygni) 220
LBV 1806-20 200
Eta Carinae 85 to 195 [10]
Epsilon Aurigae A 175
Zeta Aurigae 160 [12]
Epsilon Pegasi (Enif) 150
Gamma Crucis (Gacrux) 113[citation needed]
Gamma Andromedae 83
Alpha Leporis (Arneb) 77
Rigel (Beta Orionis) 70
Epsilon Carinae 70
R Coronae Borealis 65
Canopus (Alpha Carinae) 65
Delta Orionis (Mintaka) 60
Zeta Orionis (Alnitak) 60
Alpha Persei (Mirfak) 60
Zeta Geminorum (Mekbuda) 60
Eta Aquilae 60
Gamma Draconis (Eltanin) 50
Aldebaran (Alpha Tauri) 43 [13]
Beta Ursae Minoris (Kochab) 41
Beta Cygni A1 16

See also

Notes

  1. ^ Roberta M. Humphreys (2006-10-13). "VY Canis Majoris: The Astrophysical Basis of Its Luminosity". p. 3. Retrieved 2009-12-04. radius is 1800 to 2100 R⊙ 
  2. ^ K. Ohnaka, et al. Spatially resolved dusty torus toward the red supergiant WOH G64 in the Large Magellanic Cloud. Table 3 page 7 "derived from our radiative transfer modeling."
  3. ^ a b c Nugent, Richard. "The Garnet Star". weblore.com. Retrieved 2009-12-04. DIAM .. m Cep 1224 ... V509 CAS 910 ... V382 CAR 747 
  4. ^ "Garnet Star". Retrieved 2009-12-04. at 0.021 seconds of arc, giving it a radius 1650 times ... Mu Cep's distance ... give a luminosity 353,000 times that of the Sun and a radius of 1450 Suns 
  5. ^ A NEW VLA-HIPPARCOS DISTANCE TO BETELGEUSE AND ITS IMPLICATIONS. Graham M. Harper et al 2008 The Astronomical Journal 135 1430-1440 doi: 10.1088/0004-6256/135/4/1430 [1]
  6. ^ Jim Kaler. 2009-06-26. Betelgeuse "0.047 seconds of arc, from which we find a true radius of between 4.1 (compromise distance) and 4.6 (larger distance) AU, ... extended atmosphere, and the pulsations make it difficult to locate an actual "surface" to tell just how large the star actually is. ... "size" of the star depends on the color of observation. Long-wave infrared ... up to 5 AU and greater, ... shorter-wave infrared ... 3 AU. ... Betelgeuse to be shrinking ... not even round, but somewhat oval"
  7. ^ "Big and Giant Stars"
  8. ^ [2]
  9. ^ Lamers, H. J. G. L. M. (February 6–10, 1995). "Observations and Interpretation of Luminous Blue Variables". Cape Town, South Africa: Astronomical Society of the Pacific: 176–191. Bibcode:1995ASPC...83..176L. Retrieved 2009-03-25.  line feed character in |booktitle= at position 49 (help); Check date values in: |date= (help)
  10. ^ http://etacar.umn.edu/etainfo/basic/

External links