HD 220138 is a star located in the constellation of Aquarius. It is classified as a G-type main-sequence star, similar to our Sun, and is approximately 60 light-years away from Earth. This star is part of a larger group of stars known as the Hipparcos catalog, which includes many nearby celestial objects. The star has a visual magnitude of around 7.5, making it faintly visible to the naked eye under ideal conditions. HD 220138 is of particular interest to astronomers studying stellar evolution and the characteristics of stars within our galaxy, the Milky Way.