Theta Boötis
Star
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Theta Boötis, Latinized from θ Boötis, is a star in the northern constellation of Boötes the herdsman, forming a corner of the upraised left hand of this asterism. It has the traditional name Asellus Primus and the Flamsteed designation 23 Boötis.... Wikipedia
Magnitude: 4.05
Constellation: Boötes
Luminosity: 4.131 L☉
Absolute magnitude (MV): 3.25
Apparent magnitude (V): 4.05 + 13.23
B−V color index: +0.50
Parallax (π): 68.82 ± 0.14 mas