NGC 6745

NGC 6745 is an irregular galaxy about 206 million light-years away in the constellation Lyra. It was discovered by French astronomer Édouard Stephan on 24 July 1879.
NGC 6745 is actually a trio of galaxies in the process of colliding. The three galaxies have been colliding for hundreds of millions of years. After passing through the larger galaxy, the smaller one is now moving away. The larger galaxy was probably a spiral galaxy before the collision, but was damaged and now appears peculiar. It is unlikely that any stars in the two galaxies collided directly because of the vast distances between them. The gas, dust, and ambient magnetic fields of the galaxies, however, do interact directly in a collision. As a result of this interaction, the smaller galaxy has probably lost most of its interstellar medium to the larger one.

Supernovae

Four supernovae have been observed in NGC 6745:

SN 1999bx was discovered by the Lick Observatory Supernova Search on 26 April 1999.
SN 2022prr was discovered by ASAS-SN on 27 July 2022.
SN 2023ucy was discovered by the Zwicky Transient Facility on 5 October 2023.
SN 2024ljc was discovered by the Zwicky Transient Facility on 15 June 2024.