Phi Capricorni (φ Cap, φ Capricorni) is a solitary
[ ]star
A star is an astronomical object comprising a luminous spheroid of plasma (physics), plasma held together by its gravity. The List of nearest stars and brown dwarfs, nearest star to Earth is the Sun. Many other stars are visible to the naked ...
in the southern 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 inanimate object.
The origins of the earliest 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 ...
. 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 +5.16.[ Based upon an annual ]parallax
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight and is measured by the angle or semi-angle of inclination between those two lines. Due to foreshortening, nearby object ...
shift of 5.07 mas as seen from the Earth,[ the star is located about 640 ]light year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...
s 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 ...
, give or take 30 light years.
This is an evolved
Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes, which are passed on from parent to offspring during reproduction. Variati ...
, orange-hued K-type giant
In folklore, giants (from Ancient Greek: ''gigas'', cognate giga-) are beings of human-like appearance, but are at times prodigious in size and strength or bear an otherwise notable appearance. The word ''giant'' is first attested in 1297 fr ...
/ bright giant star with a stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the ...
of K0 II-III[ It shows an ]infrared excess
An infrared excess is a measurement of an astronomical source, typically a star, that in their spectral energy distribution has a greater measured infrared flux than expected by assuming the star is a blackbody radiator. Infrared excesses are oft ...
, which may be due to leftover material from a mass-loss event.[ The star has an estimated 2.63 times the ]mass of the Sun
The solar mass () is a standard unit of mass in astronomy, equal to approximately . It is often used to indicate the masses of other stars, as well as stellar clusters, nebulae, galaxies and black holes. It is approximately equal to the mass ...
,[ and radiates 447 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
The photosphere is a star's outer shell from which light is radiated.
The term itself is derived from Ancient Greek roots, φῶς, φωτός/''phos, photos'' meaning "light" and σφαῖρα/''sphaira'' meaning "sphere", in reference to it ...
at an effective temperature
The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation. Effective temperature is often used as an estimate of a body's surface temperature ...
of 4,490 K.[ Phi Capricorni is around 1.24][ billion years old and is spinning 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 bulge ...
of 3.8 km/s.[
]
Chinese Name
In Chinese, (), meaning '' Twelve States'', refers to an asterism which is represent twelve ancient states in the Spring and Autumn period
The Spring and Autumn period was a period in Chinese history from approximately 770 to 476 BC (or according to some authorities until 403 BC) which corresponds roughly to the first half of the Eastern Zhou period. The period's name derives fr ...
and the Warring States period
The Warring States period () was an era in History of China#Ancient China, ancient Chinese history characterized by warfare, as well as bureaucratic and military reforms and consolidation. It followed the Spring and Autumn period and concluded ...
, consisting of φ Capricorni, ι Capricorni, 38 Capricorni, 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, χ 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
6 (six) is the natural number following 5 and preceding 7. It is a composite number and the smallest perfect number.
In mathematics
Six is the smallest positive integer which is neither a square number nor a prime number; it is the second ...
, 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 φ Capricorni itself represents the state Chu (), together with ε Ophiuchi in '' Right Wall of Heavenly Market Enclosure'' (asterism).AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 24 日
/ref>[
R. H. Allen had opinion that φ Capricorni, together with χ Capricorni, represented the state ]Wei
Wei or WEI may refer to:
States
* Wey (state) (衛, 1040–209 BC), Wei in pinyin, but spelled Wey to distinguish from the bigger Wei of the Warring States
* Wei (state) (魏, 403–225 BC), one of the seven major states of the Warring States per ...
(魏).[
]
References
{{DEFAULTSORT:Phi Capricorni
K-type bright giants
Capricorni, Phi
Capricornus (constellation)
Durchmusterung objects
Capricorni, 28
202320
104963
8127