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VY Canis Majoris

VY Canis Majoris Size comparison between the Sun and VY Canis Majoris Observation data Epoch J2000      Equinox J2000 Constellation Canis Major Right ascension 07h 22m 58.33s Declination -25° 46' 03.17? Apparent magnitude (V) 6.5 to 9.6 7.9607 Characteristics Spectral type M3-M5e Ia B-V color index 2.24 Variable type Semiregular Astrometry Radial velocity (Rv) 49 ± 10 km/s Proper motion (µ) RA: 9.84 mas/yr Dec.: 0.75 mas/yr Parallax (p) 1.78 ± 3.54 mas Distance ~4,900 ly (~1,500 pc) Details Mass ~30-40 M? Radius ~1800-2,100 R? Luminosity ~450,000 L? Temperature ~3000 K Other designations VY Canis Majoris (VY CMa) is the largest known star and also one of the most luminous. It is a red hypergiant in the constellation Canis Major. It is 1800–2100 solar radii (8.4–9.8 astronomical units) in radius, about 3.0 billion km (1.9 billion mi) in diameter, and about 1.5 kiloparsecs (4,900 light-years) distant from Earth. Unlike most hypergiant stars, which occur in either binary or multiple star systems, VY CMa is a single star. It is categorized as a semiregular variable and has an estimated period of 2,000 days. It has an average density of 5 to 10 mg/m3.Placed at the center of our solar system, VY Canis Majoris's surface would extend beyond the orbit of Saturn, although some astrophysicists disagree about the star's stated radius, suggesting it is smaller: merely 600 times the radius of the Sun, which would extend past the orbit of Mars. Cite error: There are tags on this page, but the references will not show without a {{Reflist}} template or a tag; see the help page.
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