Some articles on binary, alcor:
Mizar And Alcor - Description
... Mizar (Zeta Ursae Majoris, Zeta UMa, ζ Ursae Majoris, ζ UMa) is a quadruple system of two binary stars in the constellation Ursa Major and is the second star from the end of the Big Dipper's ... make out a faint companion just to the east, named Alcor or 80 Ursae Majoris ... Alcor is of magnitude 3.99 and spectral class A5V ...
... Mizar (Zeta Ursae Majoris, Zeta UMa, ζ Ursae Majoris, ζ UMa) is a quadruple system of two binary stars in the constellation Ursa Major and is the second star from the end of the Big Dipper's ... make out a faint companion just to the east, named Alcor or 80 Ursae Majoris ... Alcor is of magnitude 3.99 and spectral class A5V ...
Pioneer Star - Description
... in Arabic known as "سها الحيوانة" is a quadruple system of two binary stars in the constellation Ursa Major and is the second star from the end of the Big Dipper's handle ... about 12 minutes of arc from Mizar, named Alcor or 80 Ursae Majoris ... Alcor is of magnitude 3.99 and spectral class A5V ...
... in Arabic known as "سها الحيوانة" is a quadruple system of two binary stars in the constellation Ursa Major and is the second star from the end of the Big Dipper's handle ... about 12 minutes of arc from Mizar, named Alcor or 80 Ursae Majoris ... Alcor is of magnitude 3.99 and spectral class A5V ...
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