If you're looking for a source on the landslide, another commenter here posted this, that seems more reliable than wikipedia. Searching for Kofel's impact, rather than landslide, brings up nonsense because there's only pseudo-evidence for that.

https://www.sciencedirect.com/science/article/abs/pii/S01695...

It dates the landslide to about 9400 years ago (BP), so this article about the star map putting it at 5500 years ago seems to be a colourful fabrication (my bad). The author of the meteor theory apparently even tries to connect it to Sodom and Gomorrah being hit by the passing heat! Lol

Finding reliable info on this "planisphere" tablet isn't easy. As far as I can tell it was untranslated and kept a low profile until this impact story