This is Abell 1367, another galaxy cluster. This is also informally known as the Leo Cluster since it’s in the constellation Leo.
This cluster averages about 321 million light years away and along with the nearby Coma Cluster, is part of the Coma Supercluster (along with other clusters).
This cluster is smaller than the Coma Cluster and has around 70 major galaxies and appears younger as it has a larger percentage of spiral galaxies than the Coma Cluster which is dominated by elliptical galaxies.
This is 26h 10m of LRGB data. For all the technical details, see astrobin.