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Betelgeuse is a red supergiant star in the constellation of Orion. It is usually the tenth-brightest star in the night sky and, after Rigel, the second-brightest in its constellation. It is a distinctly reddish, semiregular variable star whose apparent magnitude, varying between +0.0 and +1.6, has the widest range displayed by any first ...
Using the Hipparcos distance of 860 light-years (264 parsecs), the estimated relative luminosity for Rigel is about 120,000 times that of the Sun (L ☉), [17] but another recently published distance of 1,170 ± 130 light-years (360 ± 40 parsecs) suggests an even higher luminosity of 219,000 L ☉. [9]
Solar radius is a unit of distance used to express the size of stars in astronomy ... the approximate distance between Earth and the Sun. ... Rigel A 74.1 [12 ...
Found in the constellation Orion, Betelgeuse is extremely bright, especially considering that it’s roughly 650 light-years from Earth (though, it does have a radius 1,000 times bigger than the Sun).
A red supergiant star orbited by a smaller B-type main-sequence star with a radius estimated between 13 [54] and 25 R ☉. [55] Widely recognised as being among the largest known stars. [21] Another estimate give a radius of 660 R ☉ [25] based on the Gaia DR3 distance of 1 kpc. [35] U Lacertae A 1,013 [25] L/T eff: KW Sagittarii: 1,009 ± 142 ...
Examples include Rigel (−7.8), Deneb (−8.4), Naos (−6.2), and Betelgeuse (−5.8). For comparison, Sirius has an absolute magnitude of only 1.4, which is still brighter than the Sun, whose absolute visual magnitude is 4.83. The Sun's absolute bolometric magnitude is set arbitrarily, usually at 4.75.
Betelgeuse is one of the best-known stars in the night sky, as well as the easiest to find. ... In addition to new measurements of the star’s size and distance, this new study from Australian ...
Four stars—Rigel, Betelgeuse, ... It is of a similar distance and size to Rigel, but appears much fainter. ... It is 90,000 times more luminous than the Sun and is ...