24 Capricorni or A Capricorni is a single star in the southern constellation of

Capricornus Capricornus is one of the constellations of the zodiac. Its name is Latin for "horned goat" or "goat horn" or "having horns like a goat's", and it is commonly represented in the form of a sea goat: a mythical creature that is half goat, half f ...

. This object is visible to the naked eye as a faint, red-hued star with an

apparent visual magnitude Apparent magnitude () is a measure of the brightness of a star or other astronomical object observed from Earth. An object's apparent magnitude depends on its intrinsic luminosity, its distance from Earth, and any extinction of the object's lig ...

of +4.49. It is approximately 460 light years from the Sun, based on parallax. The star is moving further from the Earth with a heliocentric radial velocity of +32 km/s. This is an aging red giant, currently on the asymptotic giant branch, with a stellar classification of M1− III; a star that has exhausted the supply of hydrogen at its

core Core or cores may refer to: Science and technology * Core (anatomy), everything except the appendages * Core (manufacturing), used in casting and molding * Core (optical fiber), the signal-carrying portion of an optical fiber * Core, the centra ...

and expanded to 54 times the Sun's radius. It is radiating 611 times the

Sun's luminosity The solar luminosity (), is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun. One nominal ...

from its enlarged photosphere at an effective temperature of 3,903 K.

Chinese name

In R. H. Allen's book, this star is described as having the name ''Tsoo'', representing the state of Chu. Bayer described it as one of the last three stars of the tail of the goat, although this is not how they appear in modern visual representations of the constellation

References

{{DEFAULTSORT:24 Capricorni M-type giants Asymptotic-giant-branch stars Capricornus (constellation) Capricorni, A Durchmusterung objects Capricorni, 24 200914 104234 8060