43 Persei
{{Short description|Spectroscopic binary star system in the constellation Perseus}}
{{Starbox begin
| name = 43 Persei
}}
{{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=43 Persei
|x=408|y=397
}}
|caption=Location of 43 Persei (circled)
}}
{{Starbox observe
| epoch = J2000
| constell = Perseus
| dec = {{DEC|+50|41|43.3646}}
}}
{{Starbox character
}}
{{Starbox astrometry
| parallax = 26.0059
| p_error = 0.1271
| parallax_footnote = {{cite DR2|250437313946591360}}
}}
{{Starbox orbit
| reference = {{cite journal
| title=Improved Elements for the Hyades Group Binary 43 Persei
| last1=Wallerstein | first1=George
| journal=Publications of the Astronomical Society of the Pacific
| volume=85 | issue=503 | page=115 | date=February 1973
| doi=10.1086/129417 | bibcode=1973PASP...85..115W | doi-access=free }}
| period_unitless = 30.438 days
| axis_unitless = ≥ {{Convert|16|Gm|AU|abbr=on|lk=on}}
| eccentricity = 0.631
| periastron = {{Val|2440873.14|ul=JD|fmt=commas}}
| periarg = 27.07
| k1 = 51.85
| k2 = 54.40
}}
{{Starbox detail
}}
{{Starbox catalog
| names = {{odlist | B=A Persei | F=43 Per | BD=+50°860 | GC=4728 | HD=24546 | HIP=18453 | HR=1210 | SAO=24314 | CCDM=J03566+5042AP | WDS=J03566+5042AD }}
}}
{{Starbox reference
| Simbad = 43+Persei
}}
{{Starbox end}}
43 Persei is a binary star{{cite journal | bibcode=2008MNRAS.389..869E | doi=10.1111/j.1365-2966.2008.13596.x | arxiv = 0806.2878 | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869 | year=2008 | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | doi-access=free | s2cid=14878976 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/MNRAS/389/869/table1&mHR=1210 Vizier catalog entry] system in the northern constellation Perseus. It is visible to the naked eye as a dim, yellow-white hued star with an apparent visual magnitude of 5.28. The system is located around {{convert|38.46|pc|ly|1|adj=ri1}} distant from the Sun, based on parallax.
This is a double-lined spectroscopic binary with an orbital period of 30.4 days and an eccentricity of 0.6. The primary component is an F-type main-sequence star with a stellar classification of F5V, a star that is fusing its core hydrogen. It has 1.54 times the mass of the Sun, 2.4 times the Sun's radius, and is spinning with a projected rotational velocity of {{cvt|17|km/s}}. The star shines 10.8 times brighter than the Sun at an effective temperature of {{cvt|6609|K}}.
There are distant companions B (separation 75.5" and magnitude 10.66), C (separation 85.6" and magnitude 12.18), and D (separation 68" and magnitude 13.43).{{cite journal | bibcode=2001AJ....122.3466M | doi=10.1086/323920 | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | volume=122 | issue=6 | pages=3466 | year=2001 | last1=Mason | first1=Brian D. | last2=Wycoff | first2=Gary L. | last3=Hartkopf | first3=William I. | last4=Douglass | first4=Geoffrey G. | last5=Worley | first5=Charles E. | doi-access=free }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=B/wds/wds&WDS=03566%2B5042 Vizier catalog entry]
References
{{reflist}}
{{Stars of Perseus}}
{{DEFAULTSORT:43 Persei}}
Category:F-type main-sequence stars
Category:Spectroscopic binaries