https://www.legacysurvey.org//viewer/?ra=229.7212&dec=4.8583&layer=ls-dr9&zoom=13
2 Likes
That’s the interaction between a satellite galaxy and the spiral galaxy, most likely seen with the Umbrella Galaxy or NGC 1097. They’re one of the class of stellar streams. The satellite was probably the interactions of a magellanic-type (see the starformation)
1 Like