}}{{Starbox reference
| Simbad = HD+13530
}}{{Starbox end}}6 Persei is a binary star[14] system in the northern constellation of Andromeda.[15] It is faintly visible to the naked eye with an apparent visual magnitude of 5.29.[3] The system is located 182 light years from Earth, as determined from its annual parallax shift of {{Val|17.9|ul=mas}}.[1] It is moving further away with a heliocentric radial velocity of +42 km/s.[6] The system has a relatively high rate of proper motion, traversing the celestial sphere at the rate of {{Val|0.386|u=arcsecond/year}}.[19]This is a single-lined spectroscopic binary with an orbital period of {{Convert|1576.23|days|years|disp=out}} and an eccentricity of 0.88. The a sin i value for the primary is {{Val|201.8|0.9|ul=Gm}}, where a is the semimajor axis and i is the orbital inclination. The inclination is estimated to be 104°.[10]
The visible component is an evolved giant star with a stellar classification of {{nowrap|G8.5 IIIb Fe-2}},[3] where the suffix notation indicates an underabundance of iron in the spectrum. It has 1.5 times the mass of the Sun and has expanded to 7 times the Sun's radius. The star is radiating 26 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,920 K.[5] It has a magnitude 10.49 visual companion at an angular separation of {{Val|108.9|ul=arcsecond}} along a position angle of 57°, as of 2004.[23]
References
1. ^1 2 3 4 5 6 {{cite DR2}}
2. ^1 {{citation | first1=Roger W. | last1=Sinnott | first2=Michael A. C. | last2=Perryman | title=Millennium Star Atlas | publisher=Sky Publishing Corporation and the European Space Agency | year=1997 | page=81 | volume=1 | isbn=0-933346-82-4 | postscript=. }}
3. ^1 2 3 4 {{citation | title=The Perkins catalog of revised MK types for the cooler stars | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | journal=Astrophysical Journal Supplement Series | volume=71 | pages=245 | year=1989 | postscript=. | bibcode=1989ApJS...71..245K | doi=10.1086/191373 }}
4. ^1 2 3 {{citation | postscript=. | last1=Massarotti | first1=Alessandro | last2=Latham | first2=David W. | last3=Stefanik | first3=Robert P. | last4=Fogel | first4=Jeffrey | title=Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity | journal=The Astronomical Journal | display-authors=1 | volume=135 | issue=1 | pages=209–231 | date=January 2008 | doi=10.1088/0004-6256/135/1/209 | bibcode=2008AJ....135..209M }}
5. ^1 {{citation | 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 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | postscript=. | arxiv=0806.2878 }}
6. ^1 2 3 {{citation | title=Spectroscopic Orbits of Three Binaries | last1=Scarfe | first1=C. D. | journal=Revista Mexicana de Astronomía y Astrofísica | volume=53 | pages=333–347 | date=October 2017 | bibcode=2017RMxAA..53..333S | postscript=. }}
7. ^1 2 {{citation | last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C. | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project | journal=Astronomy & Astrophysics | volume=546 | id=A61 | pages=14 | date=October 2012 | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D | arxiv=1208.3048 | postscript=. }}
8. ^1 {{citation | last1=Lépine | first1=Sébastien | last2=Shara | first2=Michael M. | title=A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog) | journal=The Astronomical Journal | volume=129 | issue=3 | pages=1483–1522 | date=March 2005 | doi=10.1086/427854 | bibcode=2005AJ....129.1483L | arxiv=astro-ph/0412070 | postscript=. }}
9. ^1 {{citation | display-authors=1 | 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. | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | date=December 2001 | volume=122 | issue=6 | pages=3466–3471 | bibcode=2017yCat....102026M | postscript=. }}