{{Short description|Single star in the constellation Centaurus}} {{Starbox begin}} {{Starbox image | image = {{Location mark |image=Centaurus constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=HD 121474 |x=445|y=918 }} | caption = Location of HD 121474 (circled in red) }} {{Starbox observe | epoch = J2000.0 | constell = [[Centaurus (constellation)|Centaurus]]<ref name=Anderson2012/> | ra = {{RA|13|57|38.88358}}<ref name=GaiaDR3/> | dec = {{DEC|−63|41|12.1139}}<ref name=GaiaDR3/> | appmag_v = 4.701<ref name=Jones1992/> }} {{Starbox character | type = [[red giant branch]]<ref name=GaiaDR3/> | class = K1.5IIIb:<ref name=perkins1989/> | b-v = +1.101<ref name=Jones1992/> | u-b = | variable = }} {{Starbox astrometry | radial_v = {{Val|+21.86|0.12}}<ref name=GaiaDR3/> | prop_mo_ra = −40.640<ref name=GaiaDR3/> | prop_mo_dec = −33.433<ref name=GaiaDR3/> | parallax = 15.2855 | p_error = 0.0804 | parallax_footnote = <ref name=GaiaDR3/> | absmag_v = +0.67<ref name=Anderson2012/> }} {{Starbox detail | mass = {{val|2.70|0.04}}<ref name=GaiaDR3/> | radius = {{Val|11.9|0.2}}<ref name=GaiaDR3/> | metal_fe = −0.01<ref name=Jones1992/> | gravity = 2.75<ref name=Jones1992/> | luminosity = {{Val|65.2|0.6}}<ref name=GaiaDR3/> | temperature = {{Val|4753|4|fmt=commas}}<ref name=GaiaDR3/> | rotational_velocity = | age_myr = 502<ref name=GaiaDR3/> }} {{Starbox catalog | names = {{odlist | CPD=−63°3070 | FK5=514 | HD=121474 | HIP=68191 | HR=5241 | SAO=252531 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = HD+121474 }} {{Starbox end}}

'''HD 121474''' is a single<ref name=Eggleton2008/> [[star]] in the southern [[constellation]] of [[Centaurus (constellation)|Centaurus]], near the southern constellation border with [[Circinus]]. It is an orange-hued star and is faintly visible to the naked eye with an [[apparent visual magnitude]] of 4.70.<ref name=Jones1992/> This object is located at a distance of approximately 213&nbsp;[[light year]]s based on [[stellar parallax|parallax]], and it has an [[absolute magnitude]] of 0.67.<ref name=Anderson2012/> It is drifting further away from the [[Sun]] with a [[radial velocity]] of +22&nbsp;km/s.<ref name=GaiaDR3/>

This is an aging [[giant star]] with a [[stellar classification]] of K1.5IIIb:,<ref name=perkins1989/> having exhausted the supply of hydrogen at its [[stellar core|core]] then cooled and expanded off the [[main sequence]]. At present it has 12<ref name=GaiaDR3/> times the [[solar radius|girth of the Sun]], with a near-solar [[metallicity]] of −0.01.<ref name=Jones1992/> The star is radiating 65 times the [[luminosity of the Sun]] from its enlarged [[photosphere]] at an [[effective temperature]] of {{val|fmt=commas|4,753|ul=K}}.<ref name=GaiaDR3/>

== References == {{Reflist|refs=

<ref name=GaiaDR3>{{Cite Gaia DR3|5864427996198128640}}</ref>

<ref name=SIMBAD>{{cite simbad | title=HD 121474 | access-date=2020-01-30 }}</ref>

<ref name=Anderson2012>{{cite XHIP|68191}}</ref>

<ref name=Jones1992>{{citation | display-authors=1 | postscript=. | last1=Jones | first1=K. L. | last2=Robinson | first2=R. D. | last3=Slee | first3=O. B. | last4=Stewart | first4=R. T. | title=Spectroscopic investigation of cool giants and the authenticity of their reported microwave emission | journal=[[Monthly Notices of the Royal Astronomical Society]] | volume=256 | issue=3 | pages=535–544 | date=June 1992 | bibcode=1992MNRAS.256..535J | doi=10.1093/mnras/256.3.535 | doi-access=free }}</ref>

<ref name=Eggleton2008>{{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 | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | s2cid=14878976 }}</ref>

<ref name=perkins1989>{{citation | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | title=The Perkins catalog of revised MK types for the cooler stars | journal=Astrophysical Journal Supplement Series | volume=71 | pages=245 | year=1989 | postscript=. | bibcode=1989ApJS...71..245K | doi=10.1086/191373 }}</ref>

}}

{{Stars of Centaurus}}

{{DEFAULTSORT:HD 121474}} [[Category:K-type giants]] [[Category:Centaurus]] [[Category:Durchmusterung objects|PD-63 03070]] [[Category:Gould objects|Centauri, 294]] [[Category:Henry Draper Catalogue objects|121474]] [[Category:Hipparcos objects|068191]] [[Category:Bright Star Catalogue objects|5241]]