Rho Herculis (ρ Herculis) is a double star in the constellation Hercules, which is best viewed in summer. This fine pair are close in type and brightness, and most see them as bright white. However, my observation differs in that the smaller of the pair seems blue green in color as the sketch shows.
Category Archives: Double/Multiple Stars
Delta Herculis (Sarin): A White Star Surrounded by Mulitple Blues
Delta Herculis (δ Herculis) is a multiple star system with a bright white center star named Sarin. The star is the third brightest in the constellation Hercules best viewed in summer. Several blue optical companions surround the magnitude 3 central star. Double also known as Struve (Σ 3127) and SAO 84951
100 Herculis: A Pair of Equally Bright White Stars
100 Herculis is a close binary star of two equally bright stars like diamonds on black velvet. The binary lies in the constellation Hercules and is enjoyed on summer nights. Also known as SAO 85752, 100 Her, HDF 166046, STF 2280.
Algieba (Gamma Leonis): A Pretty Double Star with a Planet in Leo
Algieba is an exceptional double star, which would easily be placed in a list of TOP 10 double stars visible to backyard astronomers.
Izar (Epsilon Boötis): A Bit of Science Fiction and Loveliness
The binary star named Izar, also known as Epsilon Boötis, is located in the constellation Boötes and is best viewed in late spring. It takes a decent telescope and clear skies to split this double, but the effort pays off!
54 Leonis: An Attractive Double with an Aquamarine Star
54 Leonis is a double star with an exceptionally pretty secondary star, which is aquamarine in color. Some observers describe it as icy blue. Either way, it’s an awesome double to see in Leo.
Zeta Coronae Borealis: A Double Once Referred to as Smalt Blue
In August 1831, astronomer Admiral Smyth described the color of this double star as “smalt blue” — an intriguing description for pale blue stars. Regardless of various accounts of their color, the pair make for a pretty pair of late spring in Corona Borealis.
1 Camelopardalis: A White and Sapphire Blue Double Dances Around the Celestial Pole
1 Camelopardalis, also known as DL Cam, is a double and variable star in the constellation Camelopardalis and is viewable much of the year as it circles close to the North Star. The blue-white pair are fairly tight together at 10 arcseconds apart. They are also known as Struve 550 (STF 550), SAO 24670, HIP 21148