Vega VI

Vega VI (or Vega 6) was the sixth planet in the Vega System. A world with vast marshlands, it was rich in Veganite deposits. This world, along with many others, was conquered by the Daleks during an invasion and exploited for its resources, the Veganite in particular. (BFDE: Invasion of the Daleks)

After the Dalek War a museum was built on Vega VI dedicated to the war. Kalendorf and the Doctor witnessed a child being killed by a seemingly inert Dalek while there. (ST: Museum Peace)

It's unclear whether Vega VI is in the same system as Vega or Vega 3.