貫索四:修订间差异

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'''贯索四'''('''北冕座α''',英文缩写为'''Alpha CrB'''或'''α CrB'''),官方的名称为'''Alphecca''' {{IPAc-en|æ|l|'|f|E|k|@}}<ref name="IAU-CSN">{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt | title=IAU Catalog of Star Names | accessdate=28 July 2016 | | | }}</ref>。它是位于[[北冕座]]的一颗[[食双星]],与[[太阳]]的距离大约75[[光年]]。系统中的两颗恒星仍都是主序星,分别为[[恒星光谱#摩根-肯那光谱分类法|A型]]和[[恒星光谱#摩根-肯那光谱分类法|G型]]。
'''贯索四'''('''北冕座α''',英文缩写为'''Alpha CrB'''或'''α CrB'''),官方的名称为'''Alphecca''' {{IPAc-en|æ|l|'|f|E|k|@}}<ref name="IAU-CSN">{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt | title=IAU Catalog of Star Names | accessdate=28 July 2016 }}</ref>。它是位于[[北冕座]]的一颗[[食双星]],与[[太阳]]的距离大约75[[光年]]。系统中的两颗恒星仍都是主序星,分别为[[恒星光谱#摩根-肯那光谱分类法|A型]]和[[恒星光谱#摩根-肯那光谱分类法|G型]]。


== 性质 ==
== 性质 ==
[[File:CoronaBorealisCC.jpg|缩略图||贯索四是[[北冕座]]中最亮的恒星。]]
[[File:CoronaBorealisCC.jpg|thumb|left|贯索四是[[北冕座]]中最亮的恒星。]]


贯索四是[[联星系统]],两颗恒星以17.36天周期在[[轨道离心率|橢圆轨道]]中互相围绕。由于这个轨道的平面以88.2度的角度向地球的视线方向傾斜<ref name="aaa403">{{cite journal
贯索四是[[联星系统]],两颗恒星以17.36天周期在[[轨道离心率|橢圆轨道]]中互相围绕。由于这个轨道的平面以88.2度的角度向地球的视线方向傾斜<ref name="aaa403">{{cite journal
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<ref name=wgsn>{{cite web|url=https://www.iau.org/public/themes/naming_stars/|title=Naming Stars|publisher=[[International Astronomical Union]]|accessdate=2018-11-02|||}}</ref>
<ref name=wgsn>{{cite web|url=https://www.iau.org/public/themes/naming_stars/|title=Naming Stars|publisher=[[International Astronomical Union]]|accessdate=2018-11-02}}</ref>
<ref name="van Leeuwen2007">{{cite journal | title=Validation of the new Hipparcos reduction | url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | access-date=2020-06-25 | | | }} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=76018 Vizier catalog entry ]</ref>
<ref name="van Leeuwen2007">{{cite journal | title=Validation of the new Hipparcos reduction | url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | access-date=2020-06-25 | | | }} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=76018 Vizier catalog entry ]</ref>
<ref name=allen98crb>{{cite web|url=http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Corona_Borealis*.html|title=Corona Borealis, the Northern Crown, Star Names — Their Lore and Meaning|last=Allen|first1=Richard Hinckley|access-date=2020-06-25|||}}</ref>
<ref name=allen98crb>{{cite web|url=http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Corona_Borealis*.html|title=Corona Borealis, the Northern Crown, Star Names — Their Lore and Meaning|last=Allen|first1=Richard Hinckley|access-date=2020-06-25}}</ref>


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