58 Persei
{{short description|Multiple-star system in the constellation of Perseus}}
{{about-distinguish2|e Persei|ε (epsilon) Persei}}
{{Starbox begin}}
{{Starbox image
| image =
{{Location mark
|image=Perseus constellation map.svg|alt=|float=center|width=280
|label=|position=right
|mark=Red circle.svg|mark_width=10|mark_link=58 Persei
|x=182|y=632
}}
| caption = Location of 58 Persei (circled)
}}
{{Starbox observe
| epoch = J2000
| constell = Perseus
| dec = {{DEC|+41|15|53.3213}}
}}
{{Starbox character
| type =
| class = {{nowrap|K1II + B7V}}
| variable =
}}
{{Starbox astrometry
| parallax = 4.09
| p_error = 0.38
}}
{{Starbox orbit
| primary = 58 Persei A
| name = 58 Persei B
| period = 28.8
| axis = 0.051
| inclination = 81
| node = 237
| periastron = 1978.65
| eccentricity = 0.64
| periarg = 191
}}
{{Starbox detail
| component1 = 58 Per A
| luminosity = {{val|1731|323|fmt=commas}}
}}
{{Starbox catalog
| names = {{odlist | name=Boss 1074 | F=58 Per | BD=+40°1000 | FK5=2338 | HD=29094–95 | HIP=21476 | HR=1454 | SAO=39639 | GC=5609 | CCDM=J04367+4116A }}
}}
{{Starbox reference
| Simbad = 58+Persei
}}
{{Starbox end}}
58 Persei is a binary and possibly a triple star system in the northern constellation of Perseus. It has the Bayer designation e Persei, while 58 Persei is the Flamsteed designation. This system is visible to the naked eye as a faint point of light with an apparent visual magnitude of 4.26. It is approximately 800 light years away from the Sun based on parallax, and is drifting further away with a radial velocity of +10 km/s.
This is a single-lined spectroscopic binary system with an orbital period of 28.7 years and an eccentricity of 0.65. The primary member, designated component A, is an orange-hued (K–type) bright giant with a stellar classification of K1II. The star is around 50 million years old with 7 times the mass of the Sun. Having exhausted the supply of hydrogen at its core, it has expanded to roughly 71 times the Sun's radius. It is radiating 1,731 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,500 K.
The secondary, component B, appears to be a B-type main-sequence star with a stellar classification of B7V. It is a suspected binary of unknown period with component masses of 3.3 and 1.2 times the mass of the Sun.
References
{{reflist|refs=
{{cite simbad | title=58 Per | access-date=2019-07-23 }}
| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.
| title=A catalogue of multiplicity among bright stellar systems
| journal=Monthly Notices of the Royal Astronomical Society
| volume=389 | issue=2 | pages=869–879 | date=September 2008
| bibcode=2008MNRAS.389..869E | arxiv=0806.2878
| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | s2cid=14878976 }}
| title=New and Confirmed Triple Systems with Luminous Cool Primaries and Hot Companions
| last1=Parsons | first1=Sidney B.
| journal=The Astronomical Journal
| volume=127 | issue=5 | pages=2915–2930 | date=May 2004
| doi=10.1086/383546 | bibcode=2004AJ....127.2915P | doi-access=free }}
{{Cite journal |last1=van Belle |first1=Gerard T. |last2=von Braun |first2=Kaspar |last3=Ciardi |first3=David R. |last4=Pilyavsky |first4=Genady |last5=Buckingham |first5=Ryan S. |last6=Boden |first6=Andrew F. |last7=Clark |first7=Catherine A. |last8=Hartman |first8=Zachary |last9=van Belle |first9=Gerald |last10=Bucknew |first10=William |last11=Cole |first11=Gary |date=2021-12-01 |title=Direct Measurements of Giant Star Effective Temperatures and Linear Radii: Calibration against Spectral Types and V - K Color |bibcode=2021ApJ...922..163V |journal=The Astrophysical Journal |volume=922 |issue=2 |pages=163 |doi=10.3847/1538-4357/ac1687 |doi-access=free |arxiv=2107.09205 |issn=0004-637X}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJ/922/163&Name=HD29094 58 Persei's database entry] at VizieR.
}}
{{Stars of Perseus}}
{{DEFAULTSORT:58 Persei}}
Category:B-type main-sequence stars
Category:Spectroscopic binaries