2 Cygni
2 Cygni is a blue-white hued star in the northern constellation of Cygnus, located a few degrees from Albireo. It is a probable astrometric binary; the visible component can be viewed with the naked eye, having an apparent visual magnitude of 4.976. Based upon an annual parallax shift of , it is located roughly 910 light years from Earth. It has a peculiar velocity of and may be a runaway star system. The stellar classification of the primary is B3 IV, matching a B-type subgiant star. It has seven times the mass of the Sun and about 5.6 times the Sun's radius. The star is 37 million years old with a high rate of spin; it has a projected rotational velocity of 137 km/s. It is radiating 3,354 times the Sun's luminosity from its photosphere at an effective temperature of 16,479 K. References B-type subgiants Runaway stars Cygnus (constellation) Durchmusterung objects Cygni, 02 182568 095372 7372