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The angular diameter has later been measured in 2021 at 7.251 mas, giving a radius of 779 R ☉ at the adopted Gaia DR3 distance of 1 kpc. However, this measurement might have been affected by the binarity of VV Cephei. [14] A 2024 study give a radius of 660 R ☉ adopting the Gaia DR3 distance. [13]
VV Cephei's size is mind-boggling. It surpasses our own Sun in an incomprehensible manner. The Sun, with a diameter of about 1.4 million kilometers, is dwarfed by VV Cephei's colossal girth, which extends to an estimated 1,650 times that of our familiar solar companion.
30 Μαρ 2020 · VV Cephei is an eclipsing binary star system located approximately 4,900 light years from Earth in the constellation Cepheus. It has an apparent magnitude of 4.91. The primary star in the system, VV Cephei A, is one of the largest known stars in the Milky Way.
VV Cep is a red supergiant star that varies in an irregular/semi-regular manner over a small range (roughly 4.9 to 5.4 in V but a little fainter visually due to its red colour) but also at 20 year intervals eclipses a fainter blue companion.
VV Cephei is a beta persei (algol) and system with one or both giant or supergiant components (subtype) variable star. Variable stars are stars whose size and/or brightness changes over time.
Table A–1 Molar mass, gas constant, and critical-point properties Table A–2 Ideal-gas specific heats of various common gases Table A–3 Properties of common liquids, solids, and foods Table A–4 Saturated water—Temperature table Table A–5 Saturated water—Pressure table Table A–6 Superheated water Table A–7 Compressed liquid water Table A–8 Saturated ice–water vapor
25 Νοε 2010 · Online calculator, figures and tables with water saturation (vapor) pressure at temperatures ranging 0 to 370 °C (32 to 700°F) - in Imperial and SI Units. Water tends to evaporate or vaporize by projecting molecules into the space above its surface.
