Enough scenarios have visited Per Hathor now that it can be reasonably accurately placed on the map.
http://www.aurellis.org/other_realms/Outside_Map.pdf
The new world of Symphony is yet to be visited, but the location is clear from triangulating the Shadow Storms that accompanied its appearance.
Nice place, full of shape shifters.
Per Hathor is less nice.
That I can believe. Pretty Hostile? Lots of Goa’uld?