Galaxy cluster

https://www.legacysurvey.org//viewer/?ra=203.2050&dec=50.5285&layer=ls-dr9&zoom=11&const
This seems to me a very big galaxy cluster!

yes it’s the giant Abell cluster

Is it possible to know which Abell cluster it is?

A1758N is a sub-cluster of Abell 1758, a massive cluster containing hundreds of galaxies.

Could you please tell me where do I find the name of the clusters on this site?

You can look up the say simbad database and track some of thos scientific publications. Otherwise you could try google eath and select a sky map to reveal the classic constellations, plug in the stellar coordinates.

Thank you very much

It’s a pleasure