Springtime Double Stars in Boӧtes | SkyNews
Boötes Constellation - Herdsman in the Sky | Astronomer's Guide
Kappa Boötis (Struve 1821) - Belt of Venus
Bootes | Star-Splitters
Webb Deep-Sky Society: Double Star of the Month in Bootes
Asellus Tertius (κ Boötis) | Facts, Formation, Distance, Size & Mass
Kappa Bootis
Some Bright-Sky Observing - Double Star Observing - Cloudy Nights
Asellus Tertius (κ Boötis) | Facts, Formation, Distance, Size & Mass
Asellus Tertius (κ Boötis) | Facts, Formation, Distance, Size & Mass
Double and Multiple Star Measurements in the Northern Sky with a 10” Newtonian and a Fast CCD Camera in 2006 through 2009
Webb Deep-Sky Society: Double Star of the Month in Bootes
NCKAS -Double Stars
Webb Deep-Sky Society: Double Star of the Month in Bootes
NCKAS -Double Stars
Webb Deep-Sky Society: Double Star of the Month in Bootes
Boötes Constellation - Herdsman in the Sky | Astronomer's Guide
Kappa Boötis (Asellus Tertius): A Double Star of White and Deep Blue in Boötes – The Garden Astronomer
Kappa Boötis - Wikipedia
Astronomical League Double Star Observing Log
Seeing double (and triple) in the spring sky – Astronomy Now
Observing the sky at 30°S
Seeing double (and triple) in the spring sky – Astronomy Now
Seeing double (and triple) in the spring sky – Astronomy Now
Kappa Boötis - Wikipedia
Double and Multiple Star Measurements in the Northern Sky with a 10” Newtonian and a Fast CCD Camera in 2006 through 2009
Bootes | Star-Splitters
Kappa Bootis star hop
