User:Bay Flam/note007

Kappa Boötis (κ Bootis, κ Boö) is the 4th magnitude star in the constellation Boötes. It was the 3rd member of an former asterism, Asellus by Johann Bayer, so called Aselles tertius (Latin for "the third Ass", later Asellus Tertius. It is approximately 155 light years from theEarth.

Kappa Boötis is a binary star system viewable in small telescope, with components separated by an angular distance of 13.4 ′.

κ2 Boötis
κ2 Boötis is the brighter / following component of this star system. It is classified as a Delta Scuti type variable star and its brightness varies from magnitude +4.50 to +4.58 with a period of 1.83 hours. The companion star, κ¹ Boötis, has magnitude +6.58 and spectral class F1V.

κ1 Boötis
Kappa1 Boötis is the dimmer / precceding component of this star system. It has apparent magnitude +4.54 and spectral class A8IV.