Helo-Q

Helo-Q is a planet in the Benzuli Expanse.

IDW Generation 1 continuity
The Dead Universe anomaly in the Benzuli Expanse expanded and destroyed Helo-Q, an event that could not be prevented by a group of aliens observing the anomaly.

The AllSpark Almanac
Helo-Q was a destroyed neutral planet in the Milky Way.