Struve 1850, a binary star system in the Boötes constellation, consists of two nearly identical A1V stars, easily observable with binoculars or small telescopes. Discovered by Friedrich Struve in 1823, they are over 800 light-years away. Their similar luminosity and proximity make them delightful targets for amateur astronomers. Also known as: STF 1850, HD 127067, SAO 83374, HIP 70786, HR 5414
Category Archives: Double/Multiple Stars
Beta Draconis (Rastaban): The Dragon’s Eye
Beta Draconis, or Rastaban, is a prominent star in the constellation Draco, with an apparent magnitude of 2.8. This golden giant, situated 380 light-years away, is part of a binary system. Despite its brilliance, its companion is a dimmer star, visible only under optimal conditions. Also known as Bet Dra, Rastaben, Alwaid, Asuia, SAO 30429, HD 159181, 23 Dra, β Dra, 23 Draconis, HIP 85670, HR 6536, BU 1090
Mu Scorpii: A Pleasant Blue Visual Pair of Stars in Scorpius
Mu Scorpii, located in the tail of the Scorpion constellation, comprises two stars, Mu1 and Mu2, which appear close but are at different distances. Mu1 is a binary star system, while Mu2 is less luminous. Observations reveal the beauty of this pair, easily visible with binoculars, reminding us of the wonders of stargazing.
Zeta Sagittae (Struve 2585): A Subtle Triple Star System in the Arrow Sagitta
Sagitta, a small constellation between Aquila and Vulpecula, features Zeta Sagittae, a fascinating triple star system. The brighter component, Zeta Sagittae A, shines at magnitude 5, while its companion, Zeta Sagittae B, is fainter at magnitude 9. Located near Altair, this hidden treasure is worth observing with a telescope. Also known as STF 2585, SAO 105298, 8 Sagittae, HR 7546, HIP 97496, HD 187362
Struve 2155: A Subtle Colorful Binary in Draco
The constellation Draco features the double star Struve 2155, a notable yet subtle binary system situated about 600 light-years away. Comprising a bright yellow giant and a dimmer blue companion, this pairing offers a unique visual experience. Observers can appreciate the contrast and beauty of this hidden gem during summer evenings. Also known as: SAO 17410, HIP 84465, HD 156890, 4198-01479-1, BD+60 1742
Struve 1677: A Close Pair of Stars Near Porrima in Virgo
Struve 1677 (STF 1677) is a double star in the spring constellation of Virgo. The binary stars are fairly close together but can be split with a telescope at 16 arc seconds apart. This double is also known as SAO 138952 or HIP 62234 and lies near Porrima.
24 Cancri (Struve 1224): A Quaint Triple Star in Cancer
24 Cancri, located in the spring constellation Cancer, is known as a triple star system, but backyard astronomers will only see a pair of nearly identical and pretty white-yellow stars, Learn more about the pair and see how they look through an 8-inch SLT scope. The pair is also known as 24 Cnc A, HD 71152, HR 3312, SAO 80184, STF 1224, Struve 1224, and upsilon.
Struve 2793: A Serene Double Star in Equuleus
The constellation Equuleus, known as the Little Horse, features the intriguing triple star system Struve 2793, discovered by Friedrich Georg Wilhelm von Struve in 1827. Despite its faintness, the system includes a bright primary star and a distant companion, offering rewarding views for patient astronomers during summer and early autumn.
Also cataloged as SAO 126783, HD 203943, HIP 105743, and STF 2793