Rho Cygni

Rho Cygni, Latinized from ρ Cygni, is a yellow-hued star in the northern constellation of Cygnus. It is visible to the naked eye with an apparent magnitude of 4.02. The measured annual parallax shift is 26.39 milliarcseconds, which yields a distance estimate of 124 light years. It is moving further from the Sun with a radial velocity of +6.88. The star is a member of the thin disk population of the Milky Way galaxy.

This is an evolved giant star of type G with an estimated age of 660 million years and a stellar classification of G8 III Fe-0.5. The suffix notation indicates the spectrum shows a mild underabundance of iron in the outer atmosphere. It has about 2.16 times the mass of the Sun and 7.81 times the Sun's girth. The star is radiating 37 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,100 K.

Rho Cygni is a bright X-ray source with a luminosity of $1,026,000,000,000,000,000,000,000,000,000 ergs s^{−1}$. It has a maximum magnetic field strength of $7.3 G$ at the surface.