Webb Deep-Sky Society: Double Star of the Month Archive 2021
Kappa Herculis - Wikipedia
Kappa Lyrae - Wikiwand
HNSKY help file
Observing Double/Multiple Star Systems - Remote Astrophotography Using Slooh.com
A spectroscopic quadruple as a possible progenitor of sub-Chandrasekhar type Ia supernovae | Nature Astronomy
Delta Ophiuchi - Wikipedia
Kappa Cygni - Wikiwand
Thuban - Wikiwand
Hercules | Star-Splitters
へび座カッパ星 - Wikipedia
Webb Deep-Sky Society: Double Star of the Month Archive 2021
Hercules | Star-Splitters | Page 2
Demeter & Persephone: Spring Held Hostage [A - Lerner Publishing Group
Star-Hopping in the Northern Marches of Corona Borealis, Part Two: Kappa (κ) and Σ 1983; Zeta (ζ) and Σ 1964 ; and Lambda (λ) | Star-Splitters
John Nanson | Star-Splitters | Page 19
Beta Herculis - Wikipedia
Evaluating my double star discoveries - Double Star Observing - Cloudy Nights
Sigma Coronae Borealis | Memory Beta, non-canon Star Trek Wiki | Fandom
![Index to Astronomy Magazine's "ATLAS of the ... - Calgary Centre](https://img.yumpu.com/36994606/1/500x640/index-to-astronomy-magazines-quotatlas-of-the-calgary-centre.jpg "Index to Astronomy Magazine's "ATLAS of the ... - Calgary Centre")
Index to Astronomy Magazine's "ATLAS of the ... - Calgary Centre
Journal of Double Star Observations - JDSO.org
