V Coronae Borealis
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V Coronae Borealis (V CrB) is a Mira-type long period variable star and carbon star in the constellation Corona Borealis. Its apparent magnitude varies between 6.9 and 12.6 over a period of 357 days.[2]
V Coronae Borealis is too far from Earth for its parallax to be measured effectively. Basing on a period of 357 days, the absolute magnitude of V Coronae Borealis has been calculated to be -4.62.[3] It is estimated to be Template:Cvt from Earth, has a luminosity of Template:Solar luminosity and a rather cool effective temperature of 1,800 K, these implying a very large radius of about Template:Solar radius calculator, making V Coronae Borealis one of the largest stars so far discovered.[4] If placed in the center of the Solar System, its size would engulf all rocky planets and reach parts of the asteroid belt.
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