Mu Persei

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Star in the constellation Perseus

title: "Mu Persei" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["g-type-supergiants", "spectroscopic-binaries", "perseus-(constellation)", "bayer-objects", "durchmusterung-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects", "population-i-stars"] description: "Star in the constellation Perseus" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/Mu_Persei" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Star in the constellation Perseus ::

| image= | image=Perseus_IAU.svg | float=center | width=260 | position=right | mark=Red circle.svg | mark_width=10 | mark_link=μ Per | x%=42.5 | y%=39.2 | caption=Location of μ Persei (circled) | epoch=J2000 | constell=Perseus | ra= | dec= | appmag_v=+4.16 | class=G0Ib{{cite journal | title=The Perkins catalog of revised MK types for the cooler stars | journal=Astrophysical Journal Supplement Series | volume=71 | pages=245 | year=1989 | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | bibcode=1989ApJS...71..245K | doi=10.1086/191373 | s2cid=123149047 | title=A Catalog of Galactic Multiple Systems with a Red Supergiant and a B Star | last1=Pantaleoni González | first1=M. | last2=Maíz Apellániz | first2=J. | last3=Barbá | first3=R. H. | last4=Negueruela | first4=I. | journal=Research Notes of the AAS | volume=4 | issue=1 | id=12 | date=January 2020 | page=12 | doi=10.3847/2515-5172/ab712b | arxiv=2001.11680 | bibcode=2020RNAAS...4...12P | s2cid=211003674 | doi-access=free }} | b-v={{citation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | title=XHIP: An extended hipparcos compilation | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | arxiv=1108.4971 | doi=10.1134/S1063773712050015 | s2cid=119257644 | postscript=. }} | radial_v = 26.46 | prop_mo_ra = 5.52 | prop_mo_dec = −17.37 | parallax= 3.62 | p_error=0.20 | parallax_footnote= | absmag_v = −3.08 |reference= |period_unitless=284 d |axis_unitless=18.8 ± 8.8 mas |inclination=74 ± 24 |node=296 ± 18 |periarg=302 |eccentricity=0.062 |periastron=2,420,062 |radius=~53 |luminosity=~2030 |temperature=5418 |gravity=1.74 |metal_fe=0.09 |rotational_velocity=12 | names= |Simbad=51+Persei

Mu Persei, Latinised from μ Persei, is a binary star system in the northern constellation of Perseus. It is visible to the naked eye as a point of light with a combined apparent visual magnitude of +4.16. The distance to this system is approximately 900 light-years based on parallax measurements. It is drifting further away with a radial velocity of +26 km/s.

Mu Persei is a spectroscopic binary with an orbital period of 284 days and an eccentricity of about 0.06. The companion is a B-type star with a class of B9.5

Mu Persei is moving through the galaxy at a speed of 35.6 km/s relative to the Sun. Its projected galactic orbit carries it between 23,900 and 32,400 light-years from the center of the galaxy.

Mu Persei came closest to the Sun 5.6 million years ago when it had brightened to magnitude 3.25 from a distance of 600 light-years.

Naming

In Chinese, 天船 (Tiān Chuán), meaning Celestial Boat, refers to an asterism consisting of μ Persei, η Persei, γ Persei, α Persei, ψ Persei, δ Persei, 48 Persei and HD 27084. Consequently, μ Persei itself is known as 天船七 (Tiān Chuán qī, ).

References

(2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.
(2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues.
(2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants". Astronomy and Astrophysics.
Alden, Harold L.. (1925). "Apparent orbit of μ Persei". Astronomical Journal.
Luck, R. Earle. (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal.
(2002). "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars". Astronomy and Astrophysics.
"* mu. Per".
The primary component is a yellow [[G-type star. G-type]] [[supergiant]] star. With an [[effective temperature]] of about {{Val. 5400
link. (2013-04-14)
{{in lang. zh [http://aeea.nmns.edu.tw/2006/0607/ap060711.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 11 日] {{Webarchive. link. (2012-02-04)

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