Chi Capricorni, Latinized from χ Capricorni, is a 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 ...

. Based upon an annual parallax shift of 18.14 mas as seen from the Earth, the star is located about 180 light years from the

Sun The Sun is the star at the center of the Solar System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core. The Sun radiates this energy mainly as light, ultraviolet, and infrared radi ...

. It is visible to the naked eye 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 +5.28.

Properties

This is an

A-type main sequence star An A-type main-sequence star (A V) or A dwarf star is a main-sequence (hydrogen-burning) star of spectral type A and luminosity class V (five). These stars have spectra defined by strong hydrogen Balmer absorption lines. They measure between 1 ...

with a stellar classification of A0 V. It is a candidate

Lambda Boötis star A Lambda Boötis star is a type of chemically peculiar star which has an unusually low abundance of iron peak elements in its surface layers. One possible explanation for this is that it is the result of accretion of metal A metal (from Gre ...

, showing a chemically peculiar

spectrum A spectrum (plural ''spectra'' or ''spectrums'') is a condition that is not limited to a specific set of values but can vary, without gaps, across a continuum. The word was first used scientifically in optics to describe the rainbow of colors ...

with a low abundance of most elements heavier than oxygen. The star is around 251 million years old and is spinning rapidly with a

projected rotational velocity Stellar rotation is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, or by timing the movements of active features on the surface. The rotation of a star produces an equatorial bulg ...

of 212 km/s. It has 2.78 times the mass of the Sun and is radiating 21 times the

solar 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 photosphere at an effective temperature of 10,878 K. At an angular separation of 1,199 arcseconds lies a faint proper motion companion designated HIP 99550. At the estimated distance of Chi Capricorni, this is equal to a

projected separation This glossary of astronomy is a list of definitions of terms and concepts relevant to astronomy and cosmology, their sub-disciplines, and related fields. Astronomy is concerned with the study of celestial objects and phenomena that originate outsid ...

of 28,300 AU. It has a visual magnitude of 10.94 and a classification of M0 Vk, indicating this is a red dwarf star.

Chinese Name

Chinese Chinese can refer to: * Something related to China * Chinese people, people of Chinese nationality, citizenship, and/or ethnicity **''Zhonghua minzu'', the supra-ethnic concept of the Chinese nation ** List of ethnic groups in China, people of ...

, (), meaning '' Twelve States'', refers to an asterism which is represent twelve ancient states in the Spring and Autumn period and the

Warring States period The Warring States period () was an era in ancient Chinese history characterized by warfare, as well as bureaucratic and military reforms and consolidation. It followed the Spring and Autumn period and concluded with the Qin wars of conquest ...

, consisting of χ Capricorni, φ Capricorni, ι Capricorni,

38 Capricorni 38 may refer to: *38 (number), the natural number following 37 and preceding 39 *one of the years 38 BC, AD 38, 1938, 2038 *.38, a caliber of firearms and cartridges **.38 Special, a revolver cartridge *'' Thirty-Eight: The Hurricane That Transfor ...

35 Capricorni This is the list of notable stars in the constellation Capricornus, sorted by decreasing brightness. See also * List of stars by constellation References * * * * * * * {{Stars of Capricornus *List Capricornus Capricornus is one of th ...

, 36 Capricorni, θ Capricorni,

30 Capricorni This is the list of notable stars in the constellation Capricornus, sorted by decreasing brightness. See also * List of stars by constellation References * * * * * * * {{Stars of Capricornus *List Capricornus Capricornus is one of th ...

33 Capricorni 33 may refer to: *33 (number) *33 BC *AD 33 *1933 *2033 Music * ''33'' (Luis Miguel album) (2003) * ''33'' (Southpacific album) (1998) * ''33'' (Wanessa album) (2016) *"33 'GOD'", a 2016 song by Bon Iver * "Thirty-Three" (song), a 1995 song by th ...

, ζ Capricorni,

19 Capricorni Nineteen or 19 may refer to: * 19 (number), the natural number following 18 and preceding 20 * one of the years 19 BC, AD 19, 1919, 2019 Films * ''19'' (film), a 2001 Japanese film * ''Nineteen'' (film), a 1987 science fiction film Music ...

, 26 Capricorni,

27 Capricorni This is the list of notable stars in the constellation A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or ina ...

, 20 Capricorni, η Capricorni and

21 Capricorni 1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. I ...

. Consequently, the

Chinese name Chinese names or Chinese personal names are names used by individuals from Greater China and other parts of the Chinese-speaking world throughout East and Southeast Asia (ESEA). In addition, many names used in Japan, Korea and Vietnam are ofte ...

for χ Capricorni itself represents the state Qi (), together with

112 Herculis 112 Herculis is a binary star system in the northern constellation of Hercules. It is dimly visible to the naked eye with a combined apparent visual magnitude of 5.43. The secondary component is about two magnitudes fainter than the pr ...

in '' Left Wall of Heavenly Market Enclosure'' (asterism). :zh:北天中西星名對照表 R.H.Allen had opinion that χ Capricorni, together with φ Capricorni, were represent the state Wei (魏).

References

{{DEFAULTSORT:Chi Capricorni A-type main-sequence stars Capricorni, Chi Capricornus Durchmusterung objects Capricorni, 25 201184 104365

8087 The Intel 8087, announced in 1980, was the first x87 floating-point coprocessor for the 8086 line of microprocessors. The purpose of the 8087 was to speed up computations for floating-point arithmetic, such as addition, subtraction, multi ...