Seeing double (and triple) in the spring sky – Astronomy Now
Astronomical League Double Star Observing Log
Kappa Boötis - Wikipedia
Observing the sky at 30°S
Double and Multiple Star Measurements in the Northern Sky with a 10” Newtonian and a Fast CCD Camera in 2006 through 2009
Boötes Constellation - Herdsman in the Sky | Astronomer's Guide
Astronomical League Double Star Observing Log
Bootes | Star-Splitters
Kappa Boötis (Struve 1821) - Belt of Venus
Kappa Bootis star hop
Kappa Bootis
Seeing double (and triple) in the spring sky – Astronomy Now
NCKAS -Double Stars
Asellus Tertius (κ Boötis) | Facts, Formation, Distance, Size & Mass
NCKAS -Double Stars
The sky of May 2021 - planets, stars and main astronomical events | Astrotourism.com
Springtime Double Stars in Boӧtes | SkyNews
κ2 Boötis (kappa2 Boötis) - Star in Boötes | TheSkyLive.com
Some Bright-Sky Observing - Double Star Observing - Cloudy Nights
Asellus Tertius (κ Boötis) | Facts, Formation, Distance, Size & Mass
Bootes | Star-Splitters
The multiple alpha Geminorum, "Castor" (32 x 33 msec). The inset shows... | Download Scientific Diagram
Asellus Tertius (κ Boötis) | Facts, Formation, Distance, Size & Mass
Springtime Double Stars in Boӧtes | SkyNews
