Английская Википедия:Delta2 Canis Minoris

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Шаблон:Other stars by Bayer designation Шаблон:Starbox begin Шаблон:Starbox image Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end Delta² Canis Minoris (δ² CMi, δ² Canis Minoris) is a main-sequence star in the constellation Canis Minor, about Шаблон:Val away.

Astronomic findings

The star figures from our part of the galaxy as the more central of three that share the Delta designation (the greek-lettered catalog is that of Johann Bayer's 1603 Uranometria atlas of bright stars) in star atlases very close, southwest of Delta³ Canis Minoris which is physically unrelated. The Flamsteed designation for this star is 8 Canis Minoris in John Flamsteed's 1712 star catalog.

As of 2008, no companion has been suspected or found orbiting δ² Canis Minoris. The apparent magnitude of 5.589 means it is deemed visible to the naked eye but faint and requires a dark sky to view. Based on parallax measurements it is calculated to be Шаблон:Val distant from the Earth.

This star is rotating rapidly; the projected rotational velocity is 117.6 km/s, which means that the equator of this star is rotating at this velocity or greater. By comparison, the Sun is a slow rotator with an equatorial azimuthal velocity of 2 km/s. δ² Canis Minoris has a stellar classification of F2 V, indicating that this is an F-type main-sequence star that is generating energy at its core through thermonuclear fusion of hydrogen. The effective temperature of the photosphere is about 7053 K, giving it the yellow-white hue that is characteristic of F-type stars. The radius of this star can be estimated indirectly based upon the measured brightness and color information, which suggests the star is about 86% larger than the Sun.