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Chara (gr. "joy"), also called Cor Caroli ("heart Karl", in honours Charles II., king of England), is the brightest star in the constellation of hunting dogs. Its designation after Bavarian reads alpha Canum Venaticorum. Chara is already a double star separable with small telescopes (lens aperture starting from 5 centimeters). The main star is the prototype of a class of variable stars, the so-called alpha Canum Venaticorum stars. Alpha Canum Venaticorum stars have a strong magnetic field, which produces the sunspot comparable star marks of enormous extent. Due to these marks the brightness of alpha Canum Venaticorum stars changes during its rotation more or less strongly. The brightness of the main star of Chara varies between +2,84 likes and +2.94 likes with one period of 5,47 days. The spectral type of the main star is A0. In a angle angle of 19,3"Begleitstern lain with a position angle of 224 degrees of the spectral type F0 is substantially fainter. Its brightness amounts to only +5.5 likes. Chara is approx.. removes 110 light-years (Hipparcos data base). Wikipedia does not have an article with this exact name. ... Cor Caroli or Alpha Canes Venatici is the brightest star in the northern constellation Canes Venatici. ... The Pleiades star cluster A star is any massive gaseous body in outer space, just like the Sun. ... The Pleiades star cluster A star is any massive gaseous body in outer space, just like the Sun. ...
The dashed line identifies the spin axis of the star, and the 86 degree tilt of the pole from the north is indicated.
The CHARA array, located atop Mt. Wilson in southern California, is among a handful of new "super" instruments composed of multiple telescopes optically linked to function as a single telescope of enormous size.
The CHARA array was constructed with funding from the National Science Foundation, Georgia State, the W. Keck Foundation, and the David and Lucile Packard Foundation.
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