Ogled vira Arktur

{{Starbox begin
 | name=Arktur
}}
{{Starbox image
| image = 
     <div style="position: relative">[[File:Boötes IAU.svg|250px|alt=Diagram, ki prikazuje položaj zvezde in meje ozvezdja Volar in okolico.]]
     <div style="position: absolute; left: 53.6%; top: 59.6%">[[File:Cercle rouge 100%.svg|12px]]</div>
     </div>
| caption=Arktur v ozvezdju Volar (obkrožen)
}}
{{Starbox observe
 | epoch       =J2000
 | constell    =[[Volar (ozvezdje)|Volar]]
 | ra          ={{RA|14|15|39,7}}<ref name="vanLeeuwen2007"/>
 | dec         ={{DEC|+19|10|56}}<ref name="vanLeeuwen2007"/>
 | appmag_v    =&minus;0,05<ref name=ducati/>
}}
{{Starbox character
 | class             = K0 III<ref name=gray>{{cite journal|bibcode=2003AJ....126.2048G|title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I|url=https://archive.org/details/sim_astronomical-journal_2003-10_126_4/page/2048|journal=The Astronomical Journal|volume=126|issue=4|pages=2048|last1=Gray|first1=R. O.|last2=Corbally|first2=C. J.|last3=Garrison|first3=R. F.|last4=McFadden|first4=M. T.|last5=Robinson|first5=P. E.|date=2003|doi=10.1086/378365|arxiv = astro-ph/0308182 |s2cid=119417105}}</ref>
 | appmag_1_passband = [[pas J (infrardeča)|J]]
 | appmag_1          = &minus;2,25<ref name=ducati>{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|pages=0|last1=Ducati|first1=J. R.|date=2002}}</ref>
 | b-v               = +1,23<ref name=ducati/>
 | u-b               = +1,28<ref name=ducati/>
 | r-i               = +0,65<ref name=ducati/>
 | v-r               =
 | variable          =
}}
|- bgcolor="#FFFAFA"
| Opomba (kategorija: spremenljivost): || Emisiji H in K se spreminjata.
{{Starbox astrometry
 | radial_v          =−5,19<ref>{{cite journal|bibcode=2008AJ....135..209M|title=Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity|url=https://archive.org/details/sim_astronomical-journal_2008-01_135_1/page/209|journal=The Astronomical Journal|volume=135|issue=1|pages=209–231|last1=Massarotti|first1=Alessandro|last2=Latham|first2=David W.|last3=Stefanik|first3=Robert P.|last4=Fogel|first4=Jeffrey|date=2008|doi=10.1088/0004-6256/135/1/209|doi-access=free}}</ref>
 | prop_mo_ra        ={{val|-1093,45}}<ref name="Perryman1997">{{navedi splet|url=http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-source=I/239/tyc_main&HIP=69673|title=HIP 69673|work=The Hipparcos and Tycho Catalogues|author=Perryman|date=1997|display-authors=etal}}</ref>
 | prop_mo_dec       ={{val|-1999,40}}<ref name="Perryman1997" />
 | parallax          =88,83
 | p_error           =0,54
 | parallax_footnote =<ref name="vanLeeuwen2007" />
 | absmag_v          ={{val|-0,30|0,02}}<ref name=aj135_3_892/>
}}
{{Starbox detail
 | mass                ={{val|1,08|0,06}}<ref name=ramirez_prieto_2011/>
 | metal_fe            ={{val|-0,52|0,04}}<ref name=ramirez_prieto_2011/>
 | radius              ={{val|25,4|0,2}}<ref name=ramirez_prieto_2011/>
 | rotational_velocity ={{val|2,4|1,0}}<ref name=aj135_3_892/>
 | luminosity          =170<ref name=aaa465_2_593/>
 | temperature         ={{val|4286|30}}<ref name=ramirez_prieto_2011/>
 | gravity             ={{val|1,66|0,05}}<ref name=ramirez_prieto_2011/>
 | age_gyr             ={{val|7,1|+1,5|-1,2}}<ref name=ramirez_prieto_2011/>
}}
{{Starbox catalog
 | names={{odlist | name=Alramech | name2=Alramech | name3=Abramech | B=α&nbsp;Boötis | F=16 Boötis | BD=+19° 2777 | GJ=541 | HD=124897 | HIP=69673 | HR=5340 | SAO=100944 | GCTP=3242.00 | LHS=48 }}, [[General Catalogue of Trigonometric Parallaxes|GCTP]]&nbsp;3242.00
}}
{{Starbox reference
 | Simbad=HD+124897
 | ARICNS =
}}
{{starbox sources|HIP|CCDM|HR|[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205340 VizieR catalog entry]}}
{{Starbox end}}
'''Arktur''', oznaka '''α&nbsp;Volarja''' ([[Latinizacija imen|latinizirano]] v '''Alfa Volarja''', tudi '''α Boötis''', '''Alfa Boötis''', '''Alfa&nbsp;Boo''', '''α&nbsp;Boo'''), je najsvetlejša [[zvezda]] v [[Ozvezdje|ozvezdju]] [[Volar (ozvezdje)|Volarja]], [[Seznam svetlejših zvezd|četrta najsvetlejša zvezda]] [[Nočno nebo|nočnega neba]] in najsvetlejša na [[Severna nebesna polobla|severni nebesni polobli]]. Skupaj s [[Spika|Spiko]] in [[Denebola|Denebolo]] (ali [[Regul|Regulom]], odvisno od vira), je Arktur del [[Asterizem|asterizma]] [[Pomladni trikotnik]]. Če prej naštetim zvezdam dodamo še [[Cor Caroli]], dobimo [[Veliki diamant]]. Gledano z Zemlje se nahaja skoraj na severnem [[Galaktična ravnina|galaktičnem polu]] [[Rimska cesta (galaksija)|Rimske ceste]].

==Glej tudi==
* [[Arktur v fikciji]]

==Sklici==
{{Reflist|refs=
<ref name=aaa465_2_593>{{Cite journal| last1=Schröder | first1=K.-P. | last2=Cuntz | first2=M. | title=A critical test of empirical mass loss formulas applied to individual giants and supergiants | journal=Astronomy and Astrophysics | volume=465 | issue=2 | pages=593–601 |date=April 2007 | doi=10.1051/0004-6361:20066633 | bibcode=2007A&A...465..593S |arxiv = astro-ph/0702172| s2cid=55901104 }}</ref>

<ref name=aj135_3_892>{{Cite journal| display-authors=1 | last1=Carney | first1=Bruce W. | last2=Gray | first2=David F. | last3=Yong | first3=David | last4=Latham | first4=David W. | last5=Manset | first5=Nadine | last6=Zelman | first6=Rachel | last7=Laird | first7=John B. | title=Rotation and Macroturbulence in Metal-Poor Field Red Giant and Red Horizontal Branch Stars | url=https://archive.org/details/sim_astronomical-journal_2008-03_135_3/page/892 | journal=The Astronomical Journal | volume=135 | issue=3 | pages=892–906 |date=March 2008 | doi=10.1088/0004-6256/135/3/892 | bibcode=2008AJ....135..892C |arxiv = 0711.4984| s2cid=2756572 }}</ref>

<ref name=ramirez_prieto_2011>{{Cite journal|bibcode=2011ApJ...743..135R|title=Fundamental Parameters and Chemical Composition of Arcturus|journal=[[The Astrophysical Journal]]|volume=743|issue=2|pages=135|date=December 2011 |author=I. Ramírez|author2=C. Allende Prieto|doi=10.1088/0004-637X/743/2/135|arxiv = 1109.4425 |s2cid=119186472}}</ref>

<ref name="vanLeeuwen2007">{{cite journal | first=F. | last=van Leeuwen | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–64 | date=November 2007 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | arxiv=0708.1752| s2cid=18759600 }}</ref>

}}

==Zunanje povezave==
{{Commons category|Arcturus}}
* [http://www.solstation.com/stars2/arcturus.htm SolStation.com entry]
{{Sky|14|15|39.7||19|10|56|37}}

{{Volar}}


{{normativna kontrola}}
[[Kategorija:Telesa Glieseovega kataloga bližnjih zvezd]]
[[Kategorija:Telesa Bonnskega pregleda]]
[[Kategorija:Telesa v Katalogu svetlih zvezd]]
[[Kategorija:Domnevni planetni sistemi]]
[[Kategorija:Orjakinje tipa K]]
[[Kategorija:Telesa v Katalogu Hipparcos]]
[[Kategorija:Telesa v Katalogu Henry Draper]]
[[Kategorija:Telesa v Flamsteedovem katalogu]]
[[Kategorija:Volar (ozvezdje)]]
[[Kategorija:Telesa v Bayerjevem katalogu]]