}}{{Starbox reference
| Simbad = HD+22663
}}{{Starbox end}}HD 22663 (y Eridani) is a candidate astrometric binary[11] star system in the equatorial constellation of Eridanus. It is visible to the naked eye with an apparent visual magnitude of 4.57.[3] Based upon an annual parallax shift of {{Val|14.2|ul=mas}},[1] it is located around 230 light years from the Sun. It is moving further away from the Earth with a heliocentric radial velocity of +11.5 km/s,[6] having come within {{Convert|43.20|pc|ly|abbr=on|disp=out}} some 3.76 million years ago.[3]The visible component is an orange-hued giant star with a stellar classification of K1 III,[4] having exhausted the hydrogen at its core and evolved away from the main sequence. It has an estimated 1.4 times the mass of the Sun and has expanded to 13 times the Sun's radius. At the age of 2.6 billion years, this star is radiating 96 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,660 K.[6]
References
1. ^1 2 3 4 {{cite DR2}}
2. ^1 2 3 4 5 {{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 2 {{citation | last1=Houk | first1=Nancy | title=Michigan catalogue of two-dimensional spectral types for the HD stars | volume=2 | publication-place=Ann Arbor | publisher=Dept. of Astronomy, University of Michigan | year=1978 | bibcode=1978mcts.book.....H | postscript=. }}
4. ^1 2 3 4 {{citation | title=Stellar parameters and chemical abundances of 223 evolved stars with and without planets | journal=Astronomy & Astrophysics | 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. | volume=574 | pages=A50 | year=2015 | doi=10.1051/0004-6361/201424474 | bibcode=2015A&A...574A..50J | arxiv=1410.6422 | postscript=. }}
5. ^1 {{citation | title=A catalogue of multiplicity among bright stellar systems | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869 | date=2008 | doi=10.1111/j.1365-2966.2008.13596.x | postscript=. | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 }}