{{Short description|Star in the constellation of Canis Major}} {{Starbox begin}} {{Starbox image | image = {{Location mark |image=Canis Major constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=HD 56618 |x=132|y=798 }} | caption = Location of HD 56618 (circled in red) }} {{Starbox observe | epoch = J2000.0 | constell = Canis Major<ref name=Anderson2012/> | ra = {{RA|07|16|34.99315}}<ref name=GaiaDR2/> | dec = {{DEC|−27|52|52.2453}}<ref name=GaiaDR2/> | appmag_v = 4.66<ref name=Anderson2012/> }} {{Starbox character | type = AGB<ref name=Eggen1992/> | class = M2III<ref name=houk1979/> | b-v = {{Val|1.589|0.028}}<ref name=Anderson2012/> | variable = }} {{Starbox astrometry | radial_v = {{Val|+41.5|2.8}}<ref name=Anderson2012/> | prop_mo_ra = −13.479<ref name=GaiaDR2/> | prop_mo_dec = +38.625<ref name=GaiaDR2/> | parallax = 8.3189 | p_error = 0.2874 | parallax_footnote = <ref name=GaiaDR2/> | absmag_v = −0.80<ref name=Anderson2012/> }} {{Starbox detail | mass = 1.5<ref name=khalatyan2024/> | radius = {{Val|61.1|7.3|6.9}}<ref name=GaiaDR2/> | luminosity = {{Val|699.7|27.3}}<ref name=GaiaDR2/> | gravity = 1.35<ref name=khalatyan2024/> | temperature = {{Val|3797|233|209|fmt=commas}}<ref name=GaiaDR2/> | metal_fe = −0.24<ref name=khalatyan2024/> | rotation = | rotational_velocity = | age_myr = }} {{Starbox catalog | names = {{odlist | CD=−27°3852 | FK5=2562 | HD=56618 | HIP=35205 | HR=2766 | SAO=173360 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = HD+56618 }} {{Starbox end}}

'''HD 56618''' is a single<ref name=Eggleton2008/> star in the southern constellation of Canis Major. It is a red-hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.66.<ref name=Anderson2012/> This object is located at a distance of approximately 390&nbsp;light years from the Sun based on parallax measurements. It is drifting further away with a radial velocity of +41.5&nbsp;km/s,<ref name=Anderson2012/> having come to within {{Convert|62.16|pc|ly|0|disp=out|abbr=off}} some 2.2&nbsp;million years ago.<ref name=Anderson2012/> Olin J. Eggen listed it as a probable member of the Hyades supercluster.<ref name=Eggen1985/>

This is an aging red giant star currently on the asymptotic giant branch<ref name=Eggen1992/> with a stellar classification of M2III.<ref name=houk1979/> It is no longer undergoing core hydrogen fusion and has expanded to 61<ref name=GaiaDR2/> times the radius of the Sun. The star is radiating 700<ref name=GaiaDR2/> times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 3,797&nbsp;K.<ref name=GaiaDR2/>

==References== {{Reflist|refs=

<ref name=GaiaDR2>{{Cite Gaia DR2|5356991663260068480}}</ref>

<ref name=SIMBAD>{{cite simbad | title=HD 56618 | access-date=2020-01-17 }}</ref>

<ref name=Anderson2012>{{cite XHIP|35205|mode=cs2|postscript=.}}</ref>

<ref name=khalatyan2024>{{citation |postscript=. |bibcode=2024A&A...691A..98K |title=Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost |last1=Khalatyan |first1=A. |last2=Anders |first2=F. |last3=Chiappini |first3=C. |last4=Queiroz |first4=A. B. A. |last5=Nepal |first5=S. |last6=Dal Ponte |first6=M. |last7=Jordi |first7=C. |last8=Guiglion |first8=G. |last9=Valentini |first9=M. |last10=Torralba Elipe |first10=G. |last11=Steinmetz |first11=M. |last12=Pantaleoni-González |first12=M. |last13=Malhotra |first13=S. |last14=Jiménez-Arranz |first14=Ó. |last15=Enke |first15=H. |last16=Casamiquela |first16=L. |last17=Ardèvol |first17=J. |journal=Astronomy and Astrophysics |date=2024 |volume=691 |pages=A98 |doi=10.1051/0004-6361/202451427 |arxiv=2407.06963 }}</ref>

<ref name=houk1979>{{citation | title=Michigan catalogue of two-dimensional spectral types for the HD stars | volume=3 | year=1979 | last1=Houk | first1=Nancy | location=Ann Arbor, Michigan | publisher=Dept. of Astronomy, University of Michigan | bibcode=1982mcts.book.....H | postscript=. }}</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 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 | postscript=. }}</ref>

<ref name=Eggen1992>{{citation | last1=Eggen | first1=Olin J. | title=Asymptotic giant branch stars near the sun | journal=Astronomical Journal | postscript=. | volume=104 | issue=1 | pages=275–313 | date=July 1992 | doi=10.1086/116239 | bibcode=1992AJ....104..275E }}</ref>

<ref name=Eggen1985>{{citation | title=A systematic search for members of the Hyades supercluster. V. The red giants. | last=Eggen | first=O. J. | journal=Astronomical Journal | volume=90 | pages=333–340 | date=February 1985 | doi=10.1086/113736 | bibcode=1985AJ.....90..333E }}</ref>

}}

{{Stars of Canis Major}}

{{DEFAULTSORT:HD 56618}} Category:M-type giants Category:Canis Major Category:Hyades Stream CD-27 03852 Canis Majoris, 147 056618 035205 2766