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Procyon is a binary star system with a bright primary component, Procyon A, having an apparent magnitude of 0.34, [3] and a faint companion, Procyon B, at magnitude 10.7. [4] The pair orbit each other with a period of 40.84 years along an elliptical orbit with an eccentricity of 0.4, [ 9 ] more eccentric than Mercury 's.
Main-sequence stars vary in surface temperature from approximately 2,000 to 50,000 K, whereas more-evolved stars – in particular, newly-formed white dwarfs – can have surface temperatures above 100,000 K. [3] Physically, the classes indicate the temperature of the star's atmosphere and are normally listed from hottest to coldest.
The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the eighth-brightest star in the night sky, as well as one of the closest. A yellow-white main-sequence star, it has a white dwarf companion. Gomeisa is a blue-white main-sequence star.
Disc of debris around an F-type star, HD 181327. [1] An F-type main-sequence star (F V) is a main-sequence, hydrogen-fusing star of spectral type F and luminosity class V. These stars have from 1.0 to 1.4 times the mass of the Sun and surface temperatures between 6,000 and 7,600 K. [2] Tables VII and VIII.
In 2016, the International Astronomical Union (IAU) organized a Working Group on Star Names (WGSN) [2] to catalog and standardize proper names for stars. The WGSN's first bulletin, dated July 2016, [3] included a table of 125 stars comprising the first two batches of names approved by the WGSN (on 30 June and 20 July 2016) together with names of stars adopted by the IAU Executive Committee ...
The white color is due to the star having a higher temperature than the Sun. The absorption lines in the spectrum of Canopus shift slightly with a period of 6.9 d . This was first detected in 1906 and the Doppler variations were interpreted as orbital motion. [ 58 ]
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The Alpha Centauri star system is the closest star system to the Sun. List of nearest M-type stars ... Procyon A is the closest F-type star to the Earth. Name