View source for 52 Persei

{{Short description|Star in the constellation Perseus}}
{{Starbox begin}}
{{Starbox observe
 | epoch    = J2000
 | constell = [[Perseus (constellation)|Perseus]]
 | ra       = {{RA|04|14|53.32924}}<ref name=GaiaDR2/>
 | dec      = {{DEC|+40|29|01.1973}}<ref name=GaiaDR2/>
 | appmag_v = 4.68<ref name=parson2004/>
}}
{{Starbox character
 | type     = 
 | class    = {{nowrap|G5II + A2V}}<ref name=Markowitz1969/>
 | b-v      = {{Val|1.007|0.007}}<ref name=Anderson2012/>
 | u-b      = 
 | variable = 
}}
{{Starbox astrometry
 | radial_v = {{Val|−4.50|0.74}}<ref name=Anderson2012/>
 | prop_mo_ra  = +1.249<ref name=GaiaDR2/>
 | prop_mo_dec = −30.506<ref name=GaiaDR2/>
 | parallax = 5.4208
 | p_error  = 0.2593
 | parallax_footnote = <ref name=GaiaDR2/>
 | absmag_v = −1.6 / 1.1<ref name=parson2004/>
}}
{{Starbox orbit
 | reference = <ref name=Osawa1957/>
 | period_unitless = 1576.44&nbsp;days
 | eccentricity = 0.41
 | periastron = {{Val|2425927.4|ul=JD|fmt=commas}}
 | periarg = 66.7
 | k1 = 18.1
}}
{{Starbox detail
 | component1 = f Per A
 | mass     = 4.0<ref name=parson2004/>
 | radius   = {{Val|32.40|1.47|0.83}}<ref name=GaiaDR2/>
 | temperature = {{Val|4868|64|107}}<ref name=GaiaDR2/>
 | luminosity  = {{Val|531.1|28.7}}<ref name=GaiaDR2/>
 | rotational_velocity = 
 | gravity  = 
 | metal_fe = 
 | age_gyr  = 
 | component2 = f Per B
 | mass2    = 2.4<ref name=parson2004/>
 | temperature2 = 10,232<ref name=parson2004/>
}}
{{Starbox catalog
 | names    = {{odlist | B=f&nbsp;Per | F=52&nbsp;Per | BD=+40°912 | FK5=2306 | GC=5103 | HD=26673 | HIP=19811 | HR=1306 | SAO=57000 }}<ref name=SIMBAD/>
}}
{{Starbox reference
 | Simbad   = 52+Per
}}
{{Starbox end}}

'''52 Persei''' is a suspected [[triple star]]<ref name=parson2004/> system in the northern [[constellation]] of [[Perseus (constellation)|Perseus]]. It has the [[Bayer designation]] '''f Persei''', while ''52 Persei'' is the [[Flamsteed designation]].<ref name=SIMBAD/> The system is visible to the naked eye as a faint, yellow-hued point of light with an [[apparent visual magnitude]] of 4.68.<ref name=parson2004/> It is located around 600&nbsp;[[light year]]s away from the Sun based on [[stellar parallax|parallax]], and is drifting closer with a [[radial velocity]] of −4.5&nbsp;km/s.<ref name=Anderson2012/>

The variable velocity of this system was reported by [[W. W. Campbell]] in 1918. It is a single-lined [[spectroscopic binary]] with an [[orbital period]] of {{Convert|1576.44|days|years|1|disp=out|abbr=off}} and an [[orbital eccentricity|eccentricity]] of 0.4.<ref name=Osawa1957/> The components have a visual magnitude difference of 2.7 and are unresolved by [[speckle interferometry]].<ref name=parson2004/>

The primary component is an [[stellar evolution|evolved]] [[bright giant]] star with a [[stellar classification]] of G5II.<ref name=Markowitz1969/> It has four<ref name=parson2004/> times the [[mass of the Sun]] and has expanded to 32<ref name=GaiaDR2/> times the [[Sun's radius]]. The star is radiating 531<ref name=GaiaDR2/> times the [[luminosity of the Sun]] from its enlarged [[photosphere]] at an [[effective temperature]] of 4,868&nbsp;K.<ref name=GaiaDR2/> The secondary is a suspected binary of unknown period, with its components having estimated masses equal to 2.4 and 1.0 times the mass of the Sun.<ref name=parson2004/> The more massive member of the pair has an estimated spectral class of A2V,<ref name=Markowitz1969/> matching an [[A-type main-sequence star]].

==References==
{{reflist|refs=

<ref name=GaiaDR2>{{cite DR2|227814278088126848}}</ref>

<ref name=SIMBAD>{{cite simbad | title=52 Per | access-date=2019-07-18 }}</ref>

<ref name=Anderson2012>{{cite journal
 | 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 }}</ref>

<ref name=Osawa1957>{{cite journal
 | title=The Orbits of the Spectroscopic Binaries 52 Persei and 35 Cygni
 | last1=Osawa | first1=K.
 | journal=Astrophysical Journal
 | volume=125 | page=707 | date=May 1957
 | doi=10.1086/146344 | bibcode=1957ApJ...125..707O | doi-access=free }}</ref>

<ref name=Markowitz1969>{{cite thesis | type = PhD
 | last1=Markowitz | first1=Allan Henry
 | title=A Study of Stars Exhibiting Composite Spectra
 | year=1969 | bibcode=1969PhDT.........5M | publisher=The Ohio State University}} Source: Dissertation Abstracts International, Volume: 30-07, Section: B, page: 3005</ref>

<ref name=parson2004>{{cite journal
 | last1=Parsons | first1=Sidney B.
 | title=New and Confirmed Triple Systems with Luminous Cool Primaries and Hot Companions
 | journal=The Astronomical Journal
 | volume=127 | issue=5 | pages=2915–2930 | year=2004
 | bibcode=2004AJ....127.2915P | doi=10.1086/383546 | doi-access=free }}</ref>

}}

{{Stars of Perseus}}
<!-- Properties -->
{{DEFAULTSORT:52 Persei}}
[[Category:G-type bright giants]]
[[Category:A-type main-sequence stars]]
[[Category:Spectroscopic binaries]]
[[Category:Triple star systems]]
<!-- Catalogues -->
[[Category:Perseus (constellation)]]
[[Category:Bayer objects|Persei, f]]
[[Category:Durchmusterung objects]]
[[Category:Flamsteed objects|Persei, 52]]
[[Category:Henry Draper Catalogue objects|026674]]
[[Category:Hipparcos objects|019811]]
[[Category:Bright Star Catalogue objects|1306]]