The artist did a lot of covers for the German Perry Rhodan novels. It looks like creative swipes from iconic spaceships happened more than once in the series. Not sure if these are the same artist.
Thanks. For a moment there I was wondering if Lucas or ILM had “borrowed” the design from some random book cover.
However, it’s interesting that the artist choose to add domes to the ship (presumably to differentiate it somewhat) since the Interdictor Star Destroyers introduced in the EU in the 90’s more-or-less did the same thing.
There is a dome on the bottom of an ISD though. So, just move it up top and duplicate - you get that thing.