It's pretty easy to find a bunch of web sites that mention this artifact.
here are a few that i uncovered in about 5 minutes of googling
Apache Tomcat/6.0.24 - Error reportIt's labelled "sumerian start chart" and is about half way down the page
Decoded: 'The clay tablet that tells how an asteroid destroyed Sodom 5,000 years ago' | Daily Mail Online
Assyrian clay tablet points to 'Sodom and Gomorrah' asteroid The Register
It seems the thing was found in the royal palace of ninevah