Ι2_Cygni
Iota2 Cygni
A-type main sequence star in the constellation Cygnus
Iota2 Cygni, Latinized from ι2 Cygni and often simply called ι Cygni,[8] is a single[9] star in the constellation Cygnus. It is visible to the naked eye as a white-hued point of light with an apparent visual magnitude of 3.76.[2] Located around 121.3 light-years distant from the Sun based on parallax,[1] it is drifting closer with a radial velocity of −19.5 km/s and is expected to come to within 92 light-years in around 783,000 years.[2]
This it is an A-type main-sequence star with a stellar classification of A5V,[3] a star that is currently fusing its core hydrogen. It is around 577[4] million years old and is spinning rapidly with a projected rotational velocity of 240 km/s.[6] The star has 1.8[4] times the mass of the Sun and 3.8[5] times the Sun's radius. It is radiating 35[5] times the luminosity of the Sun from its photosphere at an effective temperature of 8,216 K.[4] Based on rapid changes in the strength of a singly-ionized calcium absorption line, the star is likely host to a circumstellar disk.[10]