Xi Persei

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Star in the constellation Perseus

title: "Xi Persei" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["o-type-giants", "emission-line-stars", "runaway-stars", "perseus-(constellation)", "bayer-objects", "durchmusterung-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects", "stars-with-proper-names"] description: "Star in the constellation Perseus" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/Xi_Persei" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Star in the constellation Perseus ::

| name=Menkib | image= |image=Perseus constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=|x=368|y=807 |caption=Location of ξ Persei (circled) | epoch=J2000 | ra= | dec= | appmag_v=4.04 | constell=Perseus |class=O7.5III(n)((f)) | b-v=+0.02 | u-b=−0.93 |variable=slightly variable | radial_v=65.40 | prop_mo_ra=3.62 | prop_mo_dec=1.74 | parallax=2.62 | p_error=0.51 | parallax_footnote= | absmag_v=−5.50 | mass=26 | radius=14 | luminosity=263,000 | temperature=35,000 | metal= | gravity=3.5 | rotational_velocity=220 | age_myr=~7 | names=46 Per, HR 1228, HD 24912, FK5 148, SAO 56856, HIP 18614, BD+35°775 | Simbad = xi+per

Xi Persei (ξ Persei, abbreviated Xi Per, ξ Per), known also as Menkib ,{{cite journal |title=The pronunciations, derivations, and meanings of a selected list of star names |last=Davis |first=George A. |journal=Popular Astronomy |volume=52 |date=1944 |page = 8–30 |bibcode=1944PA.....52....8D |url=http://adsbit.harvard.edu/full/1944PA.....52....8D

Nomenclature

ξ Persei (Latinised to Xi Persei) is the star's Bayer designation.

It bore the traditional name Menkib, Menchib, Menkhib or Al Mankib, from Mankib al Thurayya (Arabic for "shoulder" [of the Pleiades]). In 2016, the International Astronomical Union (IAU) organized a Working Group on Star Names (WGSN){{citation | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN) | publisher=International Astronomical Union | access-date=22 May 2016 | postscript=. | archive-date=10 June 2016 | archive-url=https://web.archive.org/web/20160610172014/https://www.iau.org/science/scientific_bodies/working_groups/280/ | url-status=dead

In Chinese, 卷舌 (Juǎn Shé), meaning Rolled Tongue, refers to an asterism consisting of Xi Persei, Nu Persei, Epsilon Persei, Zeta Persei, Omicron Persei and 40 Persei. Consequently, the Chinese name for Xi Persei itself is 卷舌三 (Juǎn Shé sān, "the Third Star of Rolled Tongue").

Properties

Xi Persei has an apparent magnitude of +4.06 and is classified as a blue giant (spectral class O7.5III). It is intrinsically 12,700 times brighter than the Sun with absolute magnitude −5.5 in the V band. If the ultraviolet light and light from other wavelengths that emanates from Menkib is included, its total bolometric luminosity is 263,000 times that of the Sun.

The star has a mass of some 30 solar masses and a surface temperature of 35,000 kelvins, making it one of the hottest stars that can be seen with the naked eye. The fluorescence of the California Nebula (NGC 1499) is due to this star's prodigious radiation. It is a member of the Perseus OB2 association of co-moving stars, but may be a runaway star since it is now separated by 200 pc from the association's center and has an unusually high radial velocity.{{cite journal | title=Internal motions in the associations II Per and I Lac. | last1=Lesh | first1=J. R. | journal=Astronomical Journal | volume=74 | pages=891–898 | date=September 1969 | doi=10.1086/110878 | bibcode=1969AJ.....74..891L }}

References

References

  1. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.
  2. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues.
  3. (2004). "Stellar and wind parameters of Galactic O-stars. The influence of line-blocking/blanketing". Astronomy and Astrophysics.
  4. (2014). "MOST detects corotating bright spots on the mid-O-type giant ξ Persei". Monthly Notices of the Royal Astronomical Society.
  5. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters.
  6. (2010). "Comoving frame models of hot star winds. I. Test of the Sobolev approximation in the case of pure line transitions". Astronomy and Astrophysics.
  7. (2001). "On the origin of the O and B-type stars with high velocities. II. Runaway stars and pulsars ejected from the nearby young stellar groups". Astronomy and Astrophysics.
  8. "Naming Stars". IAU.org.
  9. {{in lang. zh ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN. 978-986-7332-25-7.
  10. {{in lang. zh [http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_ala_alz.htm 香港太空館 - 研究資源 - 亮星中英對照表] {{webarchive. link. (2008-10-25 , Hong Kong Space Museum. Accessed on line November 23, 2010.)

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o-type-giantsemission-line-starsrunaway-starsperseus-(constellation)bayer-objectsdurchmusterung-objectsflamsteed-objectshenry-draper-catalogue-objectshipparcos-objectsbright-star-catalogue-objectsstars-with-proper-names