Epsilon Piscis Austrini, Latinized from ε Piscis Austrini, is a blue-white hued

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 Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The origins of the e ...

Piscis Austrinus Piscis Austrinus is a constellation in the southern celestial hemisphere. The name is Latin for "the southern fish", in contrast with the larger constellation Pisces, which represents a pair of fish. Before the 20th century, it was also known as ...

. 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 +4.17. 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 objects ...

shift of 8.0981 ± 0.3582

mas Mas, Más or MAS may refer to: Film and TV * Más y Menos, fictional superhero characters, from the Teen Titans animated television series * Más (Breaking Bad), "Más" (''Breaking Bad''), a season three episode of ''Breaking Bad'' Songs * Más ( ...

as seen from the GAIA satellite, the system is located roughly 400

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 ...

. This is a

B-type main sequence star A B-type main-sequence star (B V) is a main-sequence (hydrogen-burning) star of spectral type B and luminosity class V. These stars have from 2 to 16 times the mass of the Sun and surface temperatures between 10,000 and 30,000 K. B-type stars ...

with a

stellar classification In astronomy, stellar classification is the classification of stars based on their stellar spectrum, spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a Prism (optics), prism or diffraction grati ...

of B8 Ve. It is a

Be star Be stars are a heterogeneous set of stars with B spectral types and emission lines. A narrower definition, sometimes referred to as ''classical Be stars'', is a non-supergiant B star whose spectrum has, or had at some time, one or more Balmer e ...

that 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 bulge ...

of 216 km/s, compared to an equatorial critical velocity of 301 km/s. The star has 4.1 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 is radiating 661 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 s ...

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 11,066 K. Epsilon Piscis Austrini is moving through the Galaxy at a speed of 18.7 km/s relative to the Sun. Its projected Galactic orbit carries it between and from the center of the Galaxy.

Naming

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 va ...

, (), meaning ''

Palace Guard ''Palace Guard'' is an American crime drama television series that was briefly broadcast by CBS from October 18 to November 1, 1991, as part of its 1991–92 United States network television schedule, 1991 fall lineup. It was produced by Stephen ...

'', refers to an asterism consisting of: * ε Piscis Austrini * 29 Aquarii * 35 Aquarii * 41 Aquarii * 47 Aquarii * 49 Aquarii * λ Piscis Austrini * HD 212448 *

21 Piscis Austrini This is the list of notable stars in the constellation Piscis Austrinus, sorted by decreasing brightness. See also *List of stars by constellation References * * * * * {{Stars of Piscis Austrinus *List Piscis Austrinus Piscis Austrinus i ...

20 Piscis Austrini Piscis Austrinus is a constellation in the southern celestial hemisphere. The name is Latin for "the southern fish", in contrast with the larger constellation Pisces, which represents a pair of fish. Before the 20th century, it was also known as ...

* υ Aquarii * 68 Aquarii * 66 Aquarii * 61 Aquarii * 53 Aquarii * 50 Aquarii * 56 Aquarii * 45 Aquarii * 58 Aquarii * 64 Aquarii * 65 Aquarii * 70 Aquarii * 74 Aquarii * τ² Aquarii * τ¹ Aquarii * δ Aquarii * 77 Aquarii * 88 Aquarii * 89 Aquarii * 86 Aquarii * 101 Aquarii * 100 Aquarii * 99 Aquarii * 98 Aquarii * 97 Aquarii * 94 Aquarii * ψ³Aquarii * ψ²Aquarii * ψ¹Aquarii * 87 Aquarii * 85 Aquarii * 83 Aquarii * χ Aquarii * ω¹ Aquarii * ω² Aquarii 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 often a ...

for ε Piscis Austrini itself is (, en, the Eighth Sixth Star of Palace Guard.)AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 7 日
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References

{{DEFAULTSORT:Epsilon Piscis Austrini B-type main-sequence stars Be stars Piscis Austrinus Piscis Austrini, Epsilon Durchmusterung objects Piscis Austrini, 18 214748 111954 8628