Is The Rock currently stuck in Imperium Nihilus?

[Helias_Tancred]

I was reading over my 8th edition codex, the Ritual of The Damned supplement, and the 9th edition codex supplement ... and I'm unclear on where The Rock currently is?

 

Thanks

 

 

[Angel of Solitude]

The map on https://warhammer40000.com/ places the Rock somewhere around the Pariah Nexus. Not really sure how canon this is, but it's a reference nonetheless.

 

The last confirmed location of the Rock that I can currently think of is during the Siege of Fenris. Ritual of the Damned was after this, but the 5th Company was dispatched and not the Rock. Either way, I don't think it's stuck in Imperium Nihilus.

[Helias_Tancred]

Thank you.