Pi Piscium

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Template:Short description

Pi Piscium
Template:Location mark
Location of π Piscium (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pisces
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 5.60[2] (5.56 + 9.56)[3]
Characteristics
Spectral type F0 V[4] + KV[3]
Astrometry
Radial velocity (Rv)−1.0[2] km/s
Proper motion (μ) RA: −77.29[1] mas/yr
Dec.: +9.13[1] mas/yr
Parallax (π)28.50±0.97 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+2.94[2]
Details[3]
A
Mass1.42 Template:Solar mass
RadiusTemplate:Solar radius calculatorTemplate:Efn Template:Solar radius
Luminosity5.45Template:Efn Template:Solar luminosity
Surface gravity (log g)4.16 cgs
Temperature6,810 K
Metallicity [Fe/H]Script error: No such module "val". dex
Rotational velocity (v sin i)105.9[2] km/s
Age2.0[5] Gyr
B
Mass0.75 Template:Solar mass
RadiusTemplate:Solar radius calculatorTemplate:Efn Template:Solar radius
Luminosity0.207Template:Efn Template:Solar luminosity
Temperature4,700 K
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[6]
Database references
SIMBADdata

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Pi Piscium (π Piscium) is a spectroscopic binary[3] star in the zodiac constellation of Pisces. It is faintly visible to the naked eye, having an apparent visual magnitude of 5.60.[2] Based upon an annual parallax shift of 28.50 mas as seen from Earth,[1] it is 114 light years distant. It is a member of the thin disk population of the Milky Way.[7]

The primary, of apparent magnitude 5.56,[3] is an ordinary F-type main-sequence star with a stellar classification of F0 V.[4] At the estimated age of two billion years,[5] it is about 55% of the way through its main sequence lifetime[8] and still has a relatively high rate of spin with a projected rotational velocity of 105.9 km/s.[2] 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.[3] At that temperature, Pi Piscium A has a yellow-white hue, as many F-type stars.[9]

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,[3] giving it an orange hue typical of K-type stars.[9]

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.[3]

Naming

In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Official in Charge of the Pasturing, 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 Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[10]

Notes

Template:Notelist

References

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  1. ↑ a b c d e f Script error: No such module "citation/CS1".
  2. ↑ a b c d e f Script error: No such module "citation/CS1".
  3. ↑ a b c d e f g h Script error: No such module "citation/CS1".
  4. ↑ a b Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ Template:Cite simbad
  7. ↑ Script error: No such module "citation/CS1".
  8. ↑ Script error: No such module "citation/CS1".
  9. ↑ a b Script error: No such module "citation/CS1".
  10. ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日 Template:Webarchive

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Template:Stars of Pisces

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