}}{{Starbox reference
| Simbad = 3+Per
}}{{Starbox end}}3 Persei is a single,[12] orange-hued star in the northern constellation of Perseus. It is dimly visible to the naked eye under good viewing conditions, having an apparent visual magnitude of 5.70[3] The star is located around {{convert|75|pc|ly}} distant, based upon an annual parallax shift of {{Val|13.33|0.30|u=mas}}.[1]This star has a stellar classification of K0 IV,[4] suggesting it is a K-type subgiant – an evolved star that has used up its core hydrogen and is evolving to become a red giant. However, da Silva et al. (2015) categorized it as a giant star proper.[16] At the age of around three billion years, it has an estimated 1.4 times the mass of the Sun and has expanded to move than 8 times the Sun's radius. It is radiating roughly 37 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,757 K.[10]
References
1. ^1 2 3 4 5 6 {{citation | title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | postscript=. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 }}
2. ^1 2 3 {{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }}
3. ^1 {{citation | display-authors=1 | last1=Da Silva | first1=Ronaldo | last2=Milone | first2=André de C. | last3=Rocha-Pinto | first3=Helio J. | title=Homogeneous abundance analysis of FGK dwarf, subgiant, and giant stars with and without giant planets | journal=Astronomy & Astrophysics | postscript=. | volume=580 | pages=A24 | year=2015 | bibcode=2015A&A...580A..24D | doi=10.1051/0004-6361/201525770 }}
4. ^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 | arxiv=0806.2878 | postscript=. }}
5. ^1 {{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=. }}
6. ^1 2 {{citation | last1=Cowley | first1=A. P. | last2=Bidelman | first2=W. P. | title=MK spectral types for some F and G stars | journal=Publications of the Astronomical Society of the Pacific | volume=91 | pages=83–86 | date=February 1979 | doi=10.1086/130446 | bibcode=1979PASP...91...83C }}
7. ^1 2 {{citation | title=Stellar parameters and chemical abundances of 223 evolved stars with and without planets | last1=Jofré | first1=E. | last2=Petrucci | first2=R. | last3=Saffe | first3=C. | last4=Saker | first4=L. | last5=de la Villarmois | first5=E. Artur | last6=Chavero | first6=C. | last7=Gómez | first7=M. | last8=Mauas | first8=P. J. D. | journal=Astronomy & Astrophysics | display-authors=1 | volume=574 | id=A50 | pages=46 | date=February 2015 | doi=10.1051/0004-6361/201424474 | bibcode=2015A&A...574A..50J | arxiv=1410.6422 | postscript=. }}