Nu Boötis

The Bayer designation Nu Boötis (ν Boo / ν Boötis) is shared by two star systems, in the constellation Boötes:

• ν¹ Boötis
• ν² Boötis

They are separated by 0.17° on the sky.

All of them were member of asterism 七公 (Qī Gōng), Seven Excellencies, Heavenly Market enclosure.^[1]

Ptolemy considered Nu Boötis to be shared by Hercules, and Bayer assigned it a designation in both constellations: Nu Boötis (ν Boo) and Psi Herculis (ψ Her). When the modern constellation boundaries were fixed in 1930, the latter designation dropped from use.^[2]

References