NGC 389

NGC 389 is a lenticular galaxy located in the constellation Andromeda. It is estimated to be approximately 220 million light-years from Earth and has a diameter of about 80,000 light-years. NGC 389 is classified as an S0 galaxy, meaning it possesses a prominent bulge and a flattened disk but lacks well-defined spiral arms.

The galaxy was discovered on October 6, 1885, by French astronomer Édouard Stephan. It is a member of the NGC 403 group of galaxies, a gravitationally bound group of galaxies also containing NGC 403, NGC 417, and a few smaller galaxies. These galaxies are interacting gravitationally, although no major distortions are easily visible in NGC 389 itself.

Studies of NGC 389 have focused on its morphology and its place within the larger galaxy group. Its redshift indicates its recession velocity due to the expansion of the universe, which can be used to estimate its distance. Further spectroscopic analysis could provide more insights into its stellar population, its chemical composition, and the history of its interaction with other galaxies in its group.