Psi¹ Piscium (Psi¹ Psc, ψ¹ Piscium, ψ¹ Psc) is a

binary star A binary star is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen as a single object to the naked eye are often resolved using a telescope as separate stars, in wh ...

in the constellation

Pisces Pisces may refer to: * Pisces, an obsolete (because of land vertebrates) taxonomic superclass including all fish * Pisces (astrology), an astrological sign * Pisces (constellation), a constellation **Pisces Overdensity, an overdensity of stars in ...

. It is approximately 280

light years 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 ...

from

Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ...

, based on its

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 ...

. The two components of Psi¹ Piscium are both

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 ...

s. The primary has an

apparent 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 li ...

of 5.273, while the secondary is slightly dimmer, with an apparent magnitude of 5.455. The primary itself is a close binary, with two A-type stars that orbit each other every 14.44 years. Psi¹ Piscium is moving through the Galaxy at a speed of 22.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 22,800 and 24,300 light years from the center of the Galaxy.Psi-1 Piscium A (HIP 5131)
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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 ''

Legs A leg is a weight-bearing and locomotive anatomical structure, usually having a columnar shape. During locomotion, legs function as "extensible struts". The combination of movements at all joints can be modeled as a single, linear element ...

(asterism)'', refers to an asterism consisting of refers to an asterism consisting of ψ¹ Piscium,

η Andromedae Eta Andromedae (Eta And, η Andromedae, η And) is a spectroscopic binary star in the constellation of Andromeda. It consists of two G-type subgiant or giant stars orbiting each other with a period of 115.7 days an ...

65 Piscium 65 may refer to: * 65 (number) * ''65'' (film), an upcoming American science fiction thriller film * One of the years 65 BC, AD 65, 1965, 2065 * A type of dish in Indian cuisine, such as Chicken 65 Chicken 65 is a spicy, deep-fried chicken dish o ...

, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, ν Andromedae, μ Andromedae, β Andromedae, τ Piscium,

91 Piscium This is the list of notable stars in the constellation Pisces, sorted by decreasing brightness. See also *List of stars by constellation References * * * * * {{Stars of Pisces *List Pisces Pisces may refer to: * Pisces, an obsolete (beca ...

, υ Piscium, φ Piscium and χ Piscium. 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 ψ¹ Piscium itself is (, en, the Sixteenth Star of Legs.)AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日
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References

{{DEFAULTSORT:Psi1 Piscium Piscium, Psi1 Pisces (constellation) A-type main-sequence stars Piscium, 074 005131 Binary stars 0310 006456 Durchmusterung objects