Pi Piscium

Template:Short description Template:Starbox begin Template:Starbox image Template:Starbox observe Template:Starbox character Template:Starbox astrometry Template:Starbox detail Template:Starbox catalog Template:Starbox reference Template:Starbox end Pi Piscium (π Piscium) is a spectroscopic binary star in the zodiac constellation of Pisces. It is faintly visible to the naked eye, having an apparent visual magnitude of 5.60. Based upon an annual parallax shift of 28.50 mas as seen from Earth, it is 114 light years distant. It is a member of the thin disk population of the Milky Way.

The primary, of apparent magnitude 5.56, is an ordinary F-type main-sequence star with a stellar classification of F0 V. At the estimated age of two billion years, it is about 55% of the way through its main sequence lifetime and still has a relatively high rate of spin with a projected rotational velocity of 105.9 km/s. The star has 1.42 times the mass of the Sun and Template:Solar radius calculatorTemplate:Efn of the Sun's radius. It is radiating 5.5Template:Efn times the Sun's luminosity at an effective temperature of 6,810 K. At that temperature, Pi Piscium A has a yellow-white hue, as many F-type stars.

The secondary, of apparent magnitude 9.56, is a K-dwarf star. It is 0.75 times as massive than the Sun, Template:Solar radius calculatorTemplate:Efn times as large, and has 21%Template:Efn of the luminosity. Its effective temperature is 4,700 K, giving it an orange hue typical of K-type stars.

Analysis of its motion suggest Pi Piscium may be a member of the Ursa Major association, but higher-quality observations are needed to confirm this.

Naming

In Chinese, Template:Lang (Template:Lang), meaning Official in Charge of the Pasturing, refers to an asterism consisting of refers to an asterism consisting of π Piscium, η Piscium, ρ Piscium, ο Piscium and 104 Piscium. Consequently, the Chinese name for π Piscium itself is Template:Lang (Template:Lang, Template:Langx.)