Which one - there are hundreds of stars in the Cygnus constellation
Cygni is a form of Cygnus. That's a constellation, not an individual star.
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16 Cygni Ab, it is named like this since it orbits the main star, with two stars orbiting outside it's orbit. there are four objects in that system. 16 Cygni A, 16 Cygni B, 16 Cygni C, and 16Cygni Ab. to find out how the names work, there are plenty of lists out there on binary star/planet system naming.
The largest known star is NML Cygni, which is more than 1,600 times the diameter of the sun.
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Bessel's Star - 61 Cygni is 11.41 ± 0.02 light years away form us.
There are two stars called Gienah. It comes from the Arabic 'wing'. One is Gamma Corvi - the wing of the Crow - which is blue-white. The other is Epsilon Cygni - the wing of the Swan - which is orange.
Something is missing from your question. Cygni is not a star. The constellation name is Cygnus. The star will have a name like Alpha Cygni or 25 Cygni.
NML Cygni or V1489 Cygni is a red hypergiant star and the largest star currently known, at about 1,650 times the Sun's radius
Chi Cygni is a variable star, meaning its brightness varies cyclically. Chi Cygni's temperature is typically given as 3000 K.
The Earth is about 11.4 light years away from the binary system cygni. Cygni is not the name of a star. It refers to the constellation cygnus (the swan), and is used in the names of stars and other objects within that constellation. For example, the system 61 cygni and the star gamma cygni. The constellation doesn't have a single distance from the earth because the objects of which it is made are all at different distances. For example, the brightest star in the constellation, referred to as alpha cygni, is at a distance of 1630 light years, while gamma cygni, the third brightest star in the constellation, is at a distance of about 1800 light years. 61 cygni on the other hand is only about 11 light years from earth.
NML Cygni, is a Red Hypergiant star, currently the largest know, and one of the most luminous in the Galaxy.
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There is no such star. Any of the major stars in the constellation Cygnus has "cygni" as part of its name - this is simply a suffix that means "of the Cygnus constellation".
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NML Cygni, is a Red Hypergiant star, currently the largest know, and one of the most luminous in the Galaxy.
61 Cygni is a binary star system in the constellation Cygnus.Both stars have a spectral type of K, which means there temperature is around4,500 K. This is cool for a star.See related question for the hottest star.
Which one - there are hundreds of stars in the Cygnus constellation
16 Cygni Ab, it is named like this since it orbits the main star, with two stars orbiting outside it's orbit. there are four objects in that system. 16 Cygni A, 16 Cygni B, 16 Cygni C, and 16Cygni Ab. to find out how the names work, there are plenty of lists out there on binary star/planet system naming.