Просмотр кода страницы Английская Википедия:HD 56405

{{Английская Википедия/Панель перехода}}
{{short description|Star in the constellation Canis Major}}
{{Starbox begin}}
{{Starbox image
 | image       =
{{Location mark
|image=Canis Major constellation map.svg|alt=|float=center|width=260
|label=|position=right
|mark=Red circle.svg|mark_width=8|mark_link=HD 56405
|x=101|y=356
}}
 | caption     = Location of HD 56405 (circled)
}}
{{Starbox observe
 | epoch       = J2000
 | constell    = [[Canis Major]]
 | ra          = {{RA|07|16|14.55342}}<ref name=GaiaDR2/>
 | dec         = {{DEC|-15|35|08.4724}}
 | appmag_v    = 5.45<ref name=Murphy2015/>
}}
{{Starbox character
 | type        = 
 | class       = A1V<ref name=houk1978/>
 | b-v         = {{Val|0.079|0.005}}<ref name=Anderson2012/>
 | u-b         = 
 | variable    = 
}}
{{Starbox astrometry
 | radial_v    = {{Val|+6.30|0.9}}<ref name=Gontcharov2006/>
 | prop_mo_ra  = -46.118<ref name=GaiaDR2/>
 | prop_mo_dec = -15.488<ref name=GaiaDR2/>
 | parallax    = 13.1152
 | p_error     = 0.1293
 | parallax_footnote = <ref name=GaiaDR2/>
 | absmag_v    = 0.88<ref name=Anderson2012/>
}}
{{Starbox detail
 | mass        = 2.13<ref name=David2015/>
 | radius      = 
 | luminosity  = 38.86<ref name=Anderson2012/>
 | temperature = {{Val|9562|325|fmt=commas}}<ref name=David2015/>
 | metal_fe    = 
 | gravity     = {{Val|4.14|0.14}}<ref name=David2015/>
 | rotational_velocity = 149<ref name=David2015/>
 | age_myr     = 212<ref name=David2015/>
}}
{{Starbox catalog
 | names = {{odlist | BD=−15°1734 | FK5=2561 | GJ=9228 | HD=56405 | HIP=35180 | HR=2758 | SAO=152641 | GC=9657 | TYC=5965-363-1 }}<ref name=SIMBAD/>
}}
{{Starbox reference
 | Simbad = HD+56405
}}
{{Starbox end}}

'''HD 56405''' is a [[star]] in the southern [[constellation]] of [[Canis Major]]. It is white in hue and is dimly visible to the naked eye with an [[apparent visual magnitude]] of 5.45.<ref name=Murphy2015/> To the east of HD 56405 is the open cluster [[NGC 2360]], also known as Caroline's Cluster.<ref name=Streicher2005/> The distance to HD 56405, as determined from [[stellar parallax|parallax]] measurements, is approximately 249&nbsp;[[light year]]s. It is drifting further away with a [[radial velocity]] (RV) of about +6&nbsp;km/s.<ref name=Gontcharov2006/> Although classed as a single star,<ref name=Eggleton2008/> it is to suspected to vary in RV.<ref name=Gerbaldi2003/>

This is an [[A-type main-sequence star]] with a [[stellar classification]] of A1V.<ref name=houk1978/> It was classed as a candidate [[Lambda Boötis star]],<ref name=Renson1990/> but as of 2015 this classification has been rejected by astronomers due to the star having an inconsistent [[ultraviolet|UV flux]], possible RV variability, and a fairly high rotation rate.<ref name=Murphy2015/> The star is about 212&nbsp;million years old with 2.13 times the [[mass of the Sun]] and is spinning with a [[projected rotational velocity]] of 149&nbsp;km/s.<ref name=David2015/> It is radiating 39<ref name=Anderson2012/> times the [[luminosity of the Sun]] from its [[photosphere]] at an [[effective temperature]] of around 9,562&nbsp;K.<ref name=David2015/>

==References==
{{reflist|refs=

<ref name=SIMBAD>{{cite simbad | title=HD 56405 | access-date=2019-01-06 }}</ref>

<ref name=GaiaDR2>{{Cite Gaia DR2|3031312261679398656}}</ref>

<ref name=Eggleton2008>{{cite journal
 | 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 | s2cid=14878976 }}</ref>

<ref name=Anderson2012>{{cite journal
 | 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 | arxiv=1108.4971
 | doi=10.1134/S1063773712050015 | s2cid=119257644 }}</ref>

<ref name=David2015>{{cite journal
 | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A.
 | title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets
 | journal=The Astrophysical Journal
 | volume=804 | issue=2 | pages=146 | year=2015
 | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146
 | arxiv=1501.03154 | s2cid=33401607 }}</ref>

<ref name=Murphy2015>{{cite journal
 | title=An Evaluation of the Membership Probability of 212 λ Boo Stars. I. A Catalogue
 | last1=Murphy | first1=Simon J. | last2=Corbally | first2=Christopher J.
 | last3=Gray | first3=Richard O. | last4=Cheng | first4=Kwang-Ping
 | last5=Neff | first5=James E. | last6=Koen | first6=Chris
 | last7=Kuehn | first7=Charles A. | last8=Newsome | first8=Ian
 | last9=Riggs | first9=Quinlin | display-authors=1
 | journal=Publications of the Astronomical Society of Australia
 | volume=32 | id=e036 | pages=43 | date=October 2015
 | bibcode=2015PASA...32...36M | arxiv=1508.03633
 | doi=10.1017/pasa.2015.34 | s2cid=59405545 }}</ref>

<ref name=Streicher2005>{{cite journal
 | title=Deepsky Delights: Caroline Herschel's deepsky discoveries
 | last=Streicher | first=M.
 | journal=Monthly Notes of the Astronomical Society of Southern Africa
 | volume=64 | issue=11 and 12 | pages=234–236 | date=December 2005
 | bibcode=2005MNSSA..64..234S }}</ref>

<ref name=houk1978>{{cite book
 | last1=Houk | first1=Nancy
 | last2=Smith-Moore | first2=M.
 | title=Michigan catalogue of two-dimensional spectral types for the HD stars
 | volume=4 | location=Ann Arbor | year=1978
 | publisher=Dept. of Astronomy, University of Michigan
 | bibcode=1988mcts.book.....H }}</ref>

<ref name=Gontcharov2006>{{cite journal
 | title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
 | last1=Gontcharov | first1=G. A.
 | journal=Astronomy Letters
 | volume=32 | issue=11 | pages=759–771 | date=2006
 | bibcode=2006AstL...32..759G | arxiv=1606.08053
 | doi=10.1134/S1063773706110065 | s2cid=119231169 }}</ref>

<ref name=Gerbaldi2003>{{cite journal
 | title=The heterogeneous class of lambda Bootis stars
 | display-authors=1 | last1=Gerbaldi | first1=M.
 | last2=Faraggiana | first2=R. | last3=Lai | first3=O.
 | journal=Astronomy and Astrophysics
 | volume=412 | issue=2 | pages=447–464 | date=December 2003
 | doi=10.1051/0004-6361:20031472 
 | bibcode=2003A&A...412..447G | doi-access=free }}</ref>

<ref name=Renson1990>{{cite journal
 | title=Catalogue of Lambda Bootis Candidates
 | display-authors=1 | last1=Renson | first1=P.
 | last2=Faraggiana | first2=R. | last3=Boehm | first3=C. 
 | journal=Bulletin d'Information du Centre de Données Stellaires
 | volume=38 | page=137 | date=December 1990
 | bibcode=1990BICDS..38..137R }}</ref>

}}

{{Stars of Canis Major}}

{{DEFAULTSORT:HD 56405}}
[[Category:A-type main-sequence stars]]
[[Category:Canis Major]]
[[Category:Durchmusterung objects]]
[[Category:Henry Draper Catalogue objects|056405]]
[[Category:Hipparcos objects|035180]]
[[Category:Bright Star Catalogue objects|2758]]
[[Category:Gliese and GJ objects]]
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