Mu Piscium

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title: "Mu Piscium" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["k-type-giants", "pisces-(constellation)", "bayer-objects", "durchmusterung-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects"] description: "Star in the constellation Pisces" topic_path: "general/k-type-giants" source: "https://en.wikipedia.org/wiki/Mu_Piscium" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Star in the constellation Pisces ::

| name = Mu Piscium | image = | image=Pisces IAU.svg | alt= | float=center | width=250 | label= | position=right | mark=Red circle.svg | mark_width=10 | mark_link=μ Psc | x=330 | y=490 | caption=Location of μ Piscium (circled) | epoch = J2000.0 | equinox = J2000.0 (ICRS) | constell = Pisces | ra = | dec = | appmag_v = +4.84 | class = K4 III | b-v = 1.38 | u-b = | variable = | radial_v = +34.19 | prop_mo_ra = +292.00 | prop_mo_dec = −45.95 | parallax = 10.73 | p_error = 0.19 | parallax_footnote = | absmag_v = −0.37 | source = | mass = 1.25 | radius = 37 | luminosity = 186 | temperature = | gravity = 2.07 | metal_fe = −0.39 | rotational_velocity = 1.0 | age_gyr = 5.57 | names = | Simbad = mu+Psc Mu Piscium (μ Piscium) is a solitary, orange-hued star in the zodiac constellation of Pisces. It is visible to the naked eye with an apparent visual magnitude of 4.84. Based upon an annual parallax shift of 10.73 mas as seen from Earth, it is located about 304 light years from the Sun. Given this distance, it has a relatively high proper motion, advancing 296 mas per year across the sky.

This is an evolved K-type giant star with a stellar classification of K4 III. It has an estimated 1.25 times the mass of the Sun and, at the age of 5.6 billion years, has expanded to about 37 times the Sun's radius. From this enlarged photosphere, it is radiating 186 times the Sun's luminosity at an effective temperature of 4,126 K. It has a magnitude 12.02 visual companion at an angular separation of 209.30 arc seconds along a position angle of 298°, as of 2012.

Naming

In Chinese, 外屏 (Wài Píng), meaning Outer Fence, refers to an asterism consisting of μ Piscium, δ Piscium, ε Piscium, ζ Piscium, ν Piscium, ξ Piscium and α Piscium. Consequently, the Chinese name for μ Piscium itself is 外屏四 (Wài Píng sì, .)

References

| title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}

| display-authors=1 | last1=De Medeiros | first1=J. R. | last2=do Nascimento | first2=J. D. Jr. | last3=Sankarankutty | first3=S. | last4=Costa | first4=J. M. | last5=Maia | first5=M. R. G. | title=Rotation and lithium in single giant stars | journal=Astronomy and Astrophysics | postscript=. | volume=363 | pages=239–243 | date=November 2000 | bibcode=2000A&A...363..239D | arxiv=astro-ph/0010273 }}

| display-authors=1 | last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A. | title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) – Third edition – Comments and statistics | journal=Astronomy and Astrophysics | volume=367 | issue=2 | pages=521–524 | date=February 2001 | doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289 | s2cid=425754 | postscript=. }}

| last1=Lépine | first1=Sébastien | last2=Shara | first2=Michael M. | title=A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog) | journal=The Astronomical Journal | volume=129 | issue=3 | pages=1483–1522 | date=March 2005 | doi=10.1086/427854 | bibcode=2005AJ....129.1483L | arxiv=astro-ph/0412070 | s2cid=2603568 | postscript=. }}

| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 | postscript=. }}

| last1=Luck | first1=R. Earle | last2=Heiter | first2=Ulrike | title=Giants in the Local Region | journal=The Astronomical Journal | postscript=. | volume=133 | issue=6 | pages=2464–2486 | date=June 2007 | doi=10.1086/513194 | bibcode=2007AJ....133.2464L | doi-access=free }}

| title=Abundances in the Local Region. I. G and K Giants | last1=Luck | first1=R. Earle | journal=The Astronomical Journal | volume=150 | issue=3 | id=88 | pages=23 | date=September 2015 | doi=10.1088/0004-6256/150/3/88 | bibcode=2015AJ....150...88L | arxiv=1507.01466 | s2cid=118505114 | postscript=. }}

| title=Comparing the Ca ii H and K Emission Lines in Red Giant Stars | postscript=. | display-authors=1 | last1=Ryon | first1=Jenna | last2=Shetrone | first2=Matthew D. | last3=Smith | first3=Graeme H. | journal=Publications of the Astronomical Society of the Pacific | volume=121 | issue=882 | page=842 | date=August 2009 | doi=10.1086/605456 | bibcode=2009PASP..121..842R |arxiv = 0907.3346 | s2cid=17821279 }}

| display-authors=1 | last1=Mason | first1=B. D. | last2=Wycoff | first2=G. L. | last3=Hartkopf | first3=W. I. | last4=Douglass | first4=G. G. | last5=Worley | first5=C. E. | title=The Washington Visual Double Star Catalog | journal=The Astronomical Journal | postscript=. | year=2014 | volume=122 | issue=6 | pages=3466–3471 | bibcode=2001AJ....122.3466M | doi=10.1086/323920 | doi-access=free }}

| title=mu. Psc | accessdate=2017-07-25 | postscript=. }}

References

1. {{in lang. zh [http://aeea.nmns.edu.tw/2006/0605/ap060519.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日] {{Webarchive. link. (2016-03-03)

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