NGC 7770
NGC 7770 is a lenticular galaxy in the constellation Pegasus. It was discovered on November 5, 1850 by Bindon Stoney
NGC 7770 forms a triplet of galaxies in gravitational interaction with its neighbors NGC 7769 and NGC 7771. The main galaxy of the group, NGC 7771, underwent a close encounter with the spiral galaxy NGC 7769 and another more recently with NGC 7770. NGC 7769 appears today, viewed from Earth, farther from the other two, but the possibility of a second encounter between it and NGC 7771 in the distant future is not excluded.
NGC 7771 group
According to AM Garcia, NGC 7770 is a member of the NGC 7771 galaxy group, a small galaxy group in the Virgo Supercluster. The NGC 7771 group includes at least 4 members, namely NGC 7769, NGC 7770, NGC 7771 and NGC 7786.