Possibly a fairly dim point of light, moving slowly like a planet? It was a red dwarf star (with a brown dwarf companion) so not that bright in the first place,

Possibly a fairly dim point of light, moving slowly like a planet? It was a red dwarf star (with a brown dwarf companion) so not that bright in the first place, and very, very, very far away - that perspective diagram has a log scale. The sun seen from the outer planets isn't much more than a particularly bright star, and it's much bigger and hotter than Scholz's star.