Editing Alpha Persei (section)

{{Short description|Brightest star in the constellation Perseus}}
{{Starbox begin
| name = α Persei
}}
{{Starbox image
 | image =
{{Location mark
|image = Perseus constellation map.svg
|float = center
|alt =
|label =
|position=  right
|width = 280
|mark = Red circle.svg
|mark_width = 12
|mark_link = α Persei
|x = 550
|y = 420
}}
|caption=Location of α Persei (circled)
}}
{{Starbox observe
 | epoch    = J2000
 | ra       = {{RA|03|24|19.37009}}<ref name=aaa474_2_653/>
 | dec      = {{DEC|+49|51|40.2455}}<ref name=aaa474_2_653/>
 | appmag_v = 1.82<ref name=mnras402_2_1369/>
 | constell = [[Perseus (constellation)|Perseus]]
}}
{{Starbox character
 | class    = F5&nbsp;Ib<ref name=mnras402_2_1369/><ref name=rmaa46_331/>
 | b-v      = +0.483<ref name=clpl4_99/>
 | u-b      = +0.38<ref name=clpl4_99/>
 | variable =
}}
{{Starbox astrometry
 | radial_v = −2.04<ref name=aaa485_1_303/>
 | prop_mo_ra  = +23.75<ref name=aaa474_2_653/>
 | prop_mo_dec = −26.23<ref name=aaa474_2_653/>
 | parallax = 6.44
 | p_error  = 0.17
 | parallax_footnote = <ref name=aaa474_2_653/>
 | absmag_v = −5.1<ref name=rmaa46_331/>
}}
{{Starbox detail
 | mass     = {{val|7.3|0.3}}<ref name=mnras402_2_1369/>
 | radius   = {{val|53.1|1.4}}<ref name="baines"/>
 | luminosity  = {{val|4018|53|fmt=commas}}<ref name=Beng2025/>
 | metal_fe = {{Val|-0.159|0.016}}<ref name=Beng2025/>
 | gravity  = {{val|1.9|0.04}}<ref name=mnras402_2_1369/>
 | age_myr  = 41<ref name=mnras402_2_1369/>
 | rotational_velocity = {{Val|19.0|0.2}}<ref name=Beng2025/>
 | temperature = {{val|6439|80|fmt=commas}}<ref name=Beng2025/>
}}
{{Starbox catalog
 | names=Mirfak, Mirphak, Marfak, Algeneb, Algenib, α&nbsp;Persei, α&nbsp;Per, Alpha&nbsp;Per, 33&nbsp;Persei, [[Bonner Durchmusterung|BD]]+49&nbsp;917, [[Catalog of Components of Double and Multiple Stars|CCDM]]&nbsp;J03243+4951A, [[FK5]]&nbsp;120, [[Boss General Catalogue|GC]]&nbsp;4041, [[Henry Draper Catalogue|HD]]&nbsp;20902, [[Hipparcos catalogue|HIP]]&nbsp;15863, [[Bright Star Catalogue|HR]]&nbsp;1017, [[Index Catalogue of Visual Double Stars|IDS]]&nbsp;03171+4930 A, [[PPM Star Catalogue|PPM]]&nbsp;46127, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]]&nbsp;38787, [[Washington Double Star Catalog|WDS]]&nbsp;J03243+4952A
}}
{{Starbox reference
|Simbad=alf+Per
}}
{{Starbox end}}
'''Alpha Persei''' ([[Latinisation of names|Latinized]] from '''α&nbsp;Persei''', abbreviated '''Alpha&nbsp;Per''', '''α&nbsp;Per'''), formally named '''Mirfak'''<ref name="IAU-CSN">{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt | title=IAU Catalog of Star Names |access-date=28 July 2016}}</ref> (pronounced {{IPAc-en|'|m|3r|f|æ|k}} or {{IPAc-en|'|m|ɪər|f|æ|k}}),<ref>{{Cite Merriam-Webster|Mirfak}}</ref> is the brightest [[star]] in the [[Northern celestial hemisphere|northern]] [[constellation]] of [[Perseus (constellation)|Perseus]], outshining the constellation's best-known star, [[Algol|Algol (β Persei)]]. Alpha Persei has an [[apparent visual magnitude]] of 1.8,<ref name=aaa485_1_303/> and is a [[circumpolar star]] when viewed from mid-northern latitudes.

Alpha Persei lies in the midst of a [[star cluster|cluster of stars]] named as the eponymous [[Alpha Persei Cluster]], or ''Melotte 20'', which is easily visible in [[binoculars]] and includes many of the fainter stars in the constellation.<ref name=kaler/> Determined distance using the trigonometric [[parallax]], places the star {{Convert|510|ly|pc|abbr=off|lk=on}} away.<ref name=aaa474_2_653/>