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Once considered as having the largest angular diameter of any star in the sky after the Sun, Betelgeuse lost that distinction in 1997 when a group of astronomers measured R Doradus with a diameter of 57.0 ± 0.5 mas, although R Doradus, being much closer to Earth at about 200 ly, has a linear diameter roughly one-third that of Betelgeuse. [140]
A variable yellow hypergiant whose size varied from around 680 R ☉ in 1950–1970 to 910 R ☉ in 1977, and later decreased to 390 R ☉ in the 1990s. [77] V382 Carinae (x Carinae) 485 ± 56 [78] L/T eff: A yellow hypergiant, one of the rarest types of stars. V838 Monocerotis: 464 [79] L/T eff
Betelgeuse is one of the best-known stars in the night sky, as well as the easiest to find. ... Even at the smaller diameter found in this new study, Betelgeuse would easily swallow all the inner ...
Optical diameter of Betelgeuse: 1.4 Tm Orbital distance of Saturn from Sun 2 Tm Estimated optical diameter of VY Canis Majoris, one of the largest-known stars: 5.9 Tm Orbital distance of Pluto from the Sun ~ 7.5 Tm Outer boundary of the Kuiper belt: 10 13: 10 Tm: Diameter of the Solar System as a whole [1] 16.09 Tm
a What is the actual diameter of Betelgeuse ? In the article 1e12 metres I see: 1200 million km; but the Betelgeuse article mentions this: 290 million km -- 1.9 AU -- Minimum diameter of Betelgeuse 480 million km -- 3.2 AU -- Maximum diameter of Betelgeuse. and these numbers are also copied in 1e11 metres.
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The Orion region showing the red supergiant Betelgeuse. Red supergiants are rare stars, but they are visible at great distance and are often variable so there are a number of well-known naked-eye examples: Antares A; Betelgeuse; Epsilon Pegasi; Zeta Cephei; Lambda Velorum; Eta Persei; 31 and 32 Cygni; Psi 1 Aurigae; 119 Tauri
An asteroid in our solar system will temporarily block the light of Betelgeuse, one of the brightest stars in the night sky, Monday evening and early Tuesday morning. ... Leona is estimated to be ...