Xi Piscium

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

::summary Binary star system in the constellation Pisces ::

| name = Xi Piscium | image = | image=Pisces IAU.svg | alt= | float=center | width=250 | label= | position=right | mark=Red circle.svg | mark_width=10 | mark_link=ξ Psc | x=260 | y=520 | caption=Location of ξ Piscium (circled) | epoch = J2000.0 | equinox = J2000.0 (ICRS) | constell = Pisces | ra = | dec = | appmag_v = 4.60 | type = red clump | class = K0 III | b-v = +0.95 | u-b = +0.74 | variable = | radial_v = +26.13 | prop_mo_ra = +32.687 | prop_mo_dec = +25.146 | parallax = 16.6641 | p_error = 0.2416 | parallax_footnote = | absmag_v = +0.78 | reference = | primary = | name = | period = | period_unitless = | axis = | axis_unitless = | eccentricity = | inclination = | node = | periastron =2437651 ± 40 JD | periarg = | periarg_primary = | k1 = | k2 = | source = | component1 = ξ Psc A | mass = 2.00 | radius = 9 | luminosity = 45.7 | temperature = | gravity = 2.8 | metal_fe = −0.11 | rotational_velocity = 0.0 | age_gyr = 1.22 | names = | Simbad = ksi+Psc Xi Piscium (ξ Piscium) is an orange-hued binary star system in the zodiac constellation of Pisces. In 1690, the astronomer Johannes Hevelius in his Firmamentum Sobiescianum regarded the constellation Pisces as being composed of four subdivisions. Xi Piscium was considered to be part of the Linum Austrinum, the South Cord. The star is visible to the naked eye, having an apparent visual magnitude of 4.60. Based upon an annual parallax shift of 16.7 mas as seen from Earth, it is located about 196 light years from the Sun. It is moving away from the Sun, having a radial velocity of +26 km/s.

This is a single-lined spectroscopic binary system with an orbital period of 4.6 years and an eccentricity of around 0.18. The spectroscopic binary nature of this star was discovered in 1901 by William Wallace Campbell using the Mills spectrograph at the Lick Observatory. The visible component is an evolved K-type giant star with a stellar classification of K0 III. It is a red clump star, which indicates it is generating energy through helium fusion at its core.

In non-Western astronomy

In Chinese astronomy, the "Outer Fence" () refers to an asterism consisting of ξ Piscium, δ Piscium, ε Piscium, ζ Piscium, μ Piscium, ν Piscium and α Piscium. Consequently, the Chinese name for ξ Piscium itself is "the Sixth Star of the Outer Fence" ()

References

| title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | s2cid=119257644 | postscript=. }}

| display-authors=1 | last1=Tautvaišienė | first1=G. | last2=Edvardsson | first2=B. | last3=Puzeras | first3=E. | last4=Barisevičius | first4=G. | last5=Ilyin | first5=I. | title=C, N and O abundances in red clump stars of the Milky Way | journal=Monthly Notices of the Royal Astronomical Society | volume=409 | issue=3 | pages=1213–1219 | date=December 2010 | doi=10.1111/j.1365-2966.2010.17381.x | doi-access=free | bibcode=2010MNRAS.409.1213T | postscript=. | arxiv=1007.4064 | s2cid=119182458 }}

| last1=Massarotti | first1=Alessandro | last2=Latham | first2=David W. | last3=Stefanik | first3=Robert P. | last4=Fogel | first4=Jeffrey | title=Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity | journal=The Astronomical Journal | postscript=. | volume=135 | issue=1 | pages=209–231 | date=January 2008 | doi=10.1088/0004-6256/135/1/209 | bibcode=2008AJ....135..209M | doi-access=free }}

| last1=Hevelius | first1=J. | author1-link=Johannes Hevelius | title=Firmamentum Sobiescianum | year=1690 | location=Leipzig | postscript=. }} Fix.NN

| 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=. }}

| last1=Argue | first1=A. N. | postscript=. | title=UBV photometry of 550 F, G and K type stars | journal=Monthly Notices of the Royal Astronomical Society | volume=133 | issue=4 | pages=475–493 | year=1966 | bibcode=1966MNRAS.133..475A | doi=10.1093/mnras/133.4.475 | doi-access=free }}

| display-authors=1 | last1=Pourbaix | first1=D. | last2=Tokovinin | first2=A. A. | last3=Batten | first3=A. H. | last4=Fekel | first4=F. C. | last5=Hartkopf | first5=W. I. | last6=Levato | first6=H. | last7=Morrell | first7=N. I. | last8=Torres | first8=G. | last9=Udry | first9=S. | title=SB9: The Ninth Catalogue of Spectroscopic Binary Orbits | journal=Astronomy & Astrophysics | volume=424 | pages=727–732 | year=2004 | postscript=. | bibcode=2004A&A...424..727P | doi=10.1051/0004-6361:20041213 | arxiv=astro-ph/0406573| s2cid=119387088 }}

| title=Some recent results secured with the Mills spectrograph | last1=Campbell | first1=William Wallace | journal=Lick Observatory Bulletin | postscript=. | volume=1 | issue=4 | pages=22–25 | year=1901 | bibcode=1901LicOB...1...22C | doi=10.5479/ADS/bib/1901LicOB.1.22C | doi-access=free }}

| title=Spectroscopic Orbits of Xi Piscium 60 Andromedae and ξ1 Ceti | last1=Griffin | first1=R. F. | last2=Herbig | first2=G. H. | journal=Monthly Notices of the Royal Astronomical Society | volume=196 | pages=33–43 | year=1981 | postscript=. | bibcode=1981MNRAS.196...33G | doi=10.1093/mnras/196.1.33| doi-access=free }}

| title=xi. Psc | access-date=2017-07-25 }}

References

1. "AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日".
2. {{cite Gaia DR3. 2512513678696855936

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