Faintest one I have seen so far!

https://www.legacysurvey.org//viewer/?ra=28.4659&dec=-0.4343&layer=ls-dr9&zoom=15

You really need to go to the viewer and pan around it to see it clearly. It’s better in HSC-DR2 but the data there are not good in this patch of sky.

UDGs can get super faint :slight_smile: