NGC 684
NGC 684 is a spiral galaxy approximately 135 million light-years away from Earth in the constellation of Triangulum. It was discovered by William Herschel on October 26, 1786. Edward Swift, Lewis' son, found this galaxy again on 18 Jan 1890 while "searching for Swift's Comet." and it was reported as a new object in list IX-6.
NGC 684 Group
NGC 684 is the largest member of a group of galaxies named after it, which includes the galaxies NGC 670 and IC 1731.Supernovae
Two supernovae have been observed in NGC 684:- SN2021ass was discovered by the Zwicky Transient Facility on 18 January 2021.
- SN2025aml was discovered by the Zwicky Transient Facility on 31 January 2025.