Struve 1931, situated in the Serpens constellation, is a binary star system ideal for mid-northern observations during spring and summer. With magnitudes of 7.2 and 8.0, it’s visible through small telescopes. The primary is an F7V star, while the secondary is a G3V star, displaying a striking color contrast.
Category Archives: Double/Multiple Stars
HD 118266: An Attractive Orange and Dim Blue Binary in Virgo
Learn about the pretty double star HD 118266 in the constellation Virgo viewed on spring nights. The star also known as HJ 228, is a binary star that has a orange primary and a dimmer blue companion that lies far apart enough for smaller scopes to observe. It’s also known as SAO 100630, HIP 66326, HR 5114.
Graffias (Beta Scorpii): A White and Baby Blue Pair in Scorpius
Learn about the pretty double star Graffias (Beta Scorpii) in the constellation Scorpius viewed on summer nights and popular with astronomers. The star also known as Acrab is viewed with the naked eye and a moderate telescope resolves a double star of blue and white. The star is also designated by the following names: 8 Sco, Elacrab, HD 144217, HIP 78820, HR 5984, Bet1 Sco, Grafias, SAO 159682
23 Ursae Majoris: A Stellar Duo in The Great Bear
Ursa Major is a familiar sight in the northern night sky, home to the easily recognizable Big Dipper. While the stars of the Dipper often steal the show, the constellation is filled with other fascinating celestial objects, including one of my favorite galaxies, M51. Amongst all these significant objects is the binary star system 23ContinueContinue reading “23 Ursae Majoris: A Stellar Duo in The Great Bear”
59 Cygni: A Vibrant Blue-White Multiple Star
The constellation Cygnus, the swan, has its fair share of double stars, including the magnificent Albireo. The multiple star 59 Cygni joins this family of stars and is viewable during summer and autumn. The primary is a vibrant blue-white color. The binary is also known as 59 Cyg, STF 2743, V832 Cyg, HR 8047, SAO 50335, HD 200120.
Struve 2443: A Fine White Binary in Aquila
Backyard astronomers can spot the binary star Struve 2446 in the constellation Aquila during late summer and early autumn nights. Cataloged by Friedrich von Struve in 1825, the pair is visible under dark conditions. Struve 2446 A appears pale yellow while Struve 2446 B is fainter, offering a rewarding telescope experience. The pair are also cataloged as SAO 104432, HIP 93635, HD 177434, STF 2443, Struve 2443.
Struve 2446: A Quaint Yellow and White Binary in Aquila
Backyard astronomers can spot the binary star Struve 2446 in the constellation Aquila during late summer and early autumn nights. Cataloged by Friedrich von Struve in 1825, the pair is visible under dark conditions. Struve 2446 A appears pale yellow while Struve 2446 B is fainter, offering a rewarding telescope experience. Also known as STF 2446, Σ2446, HD 177749, SAO 124257
Delta Boötis (Princeps): A Golden Yellow Double Star in Boötes
On spring and summer nights, the double star Delta Boötis shines down from the northern constellation of Boötes, the Herdsman. The two stars are wide apart in the sky, making them an easy target to find. Accounting for the significant separation between the two and the beautiful golden hue of the primary star, this double star instantly becomes a gem for backyard astronomers. The pair is also known by the following: Del Boo, STFA 27, SAO 64589, HD 135722, 49 Bootis, δ Boo, HR 5681, HIP 74666
The Garden Astronomer 