Hi Victor and Uwe,

Thank you for your replies! It is really interesting that GK Per went from visible with 14" to limit of perception with 27" within ~ 2 decades. But probably it could have been expected to be much dimmer now that it has expanded (larger surface and less excitation).

I took a quick look at photos from the Panstarrs survey (newer than DSS) for locations of a few novae that happened a few decades ago, but didn't find any nebulae there.

Clear skies

Robin