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The fifth star in Cygnus above magnitude 3 is Aljanah, [23] designated ε Cygni. It is an orange-hued giant star of magnitude 2.5, 72 light-years from Earth. [25] [26] There are several other dimmer double and binary stars in Cygnus. μ Cygni is a binary star with an optical tertiary component. The binary system has a period of 790 years and is ...
List of stars in Cygnus. ... multiple star 28 Cyg: b 2: 28: V1624: 191610: 99303: 20 h 09 m 25.62 s ... • HIP = Hipparcos Catalogue designation number
Zeta Cygni (ζ Cyg) is a binary star system in the northern constellation of Cygnus, the swan. It has an apparent visual magnitude of 3.26 and, based upon parallax measurements, is about 143 light-years (44 parsecs) away. The primary component, ζ Cyg A is a giant star with a spectral type of G8 IIIp.
Albireo is the star in the head of the constellation of Cygnus (bottom). β Cygni (Latinised to Beta Cygni) is the system's Bayer designation. The brighter of the two components is designated β¹ Cygni or Beta Cygni A and the fainter β² Cygni or Beta Cygni B. The origin of the star system's traditional name Albireo is unclear.
HD 188753 is a hierarchical triple star system approximately 151 light-years away in the constellation of Cygnus, the Swan. In 2005, an extrasolar planet was announced to be orbiting the primary star (designated HD 188753 A) in the system. Follow-up measurements by an independent group in 2007 did not confirm the planet's existence.
Theta Cygni (θ Cygni, θ Cyg) is a star in the northern constellation of Cygnus. It has an apparent visual magnitude of 4.5, so it can be seen with the naked eye in sufficiently dark skies . Based upon parallax measurements, it is at a distance of about 59.8 light-years (18.3 parsecs ) from the Earth .
SS Cygni is a variable star in the northern constellation Cygnus (the Swan). It was discovered in 1896 by Louisa D. Wells, a computer working under Edward Pickering at Harvard College Observatory . [ 7 ] [ 8 ] It is the prototype of the subclass of dwarf novae that show only normal eruptions.
The primary, Delta Cygni A, is a blue-white giant star of spectral class B9, [4] with a temperature of 10,400 K. [11] It is nearing the end of its main-sequence life stage with a luminosity 155 times that of the Sun, [10] a radius of 4.81 solar radii, [11] and a mass approximately 2.93 solar masses.