Aschen homeworld
From The Stargate Omnipedia
Planet originally on SG-1's mission list, locked out of the Stargate Command dialing computer.
In an alternate reality SG-1 visited P4C-970 and encountered the Aschen, so this is either a world under their Confederation banner or is indeed their home planet, but because it was not visited in the new timeline this is only a presumption.
DETAILS
HOME TO - Aschen
FIRST APPEARED - N/A
KEY EPISODES
2010 - SG-1 members Carter, Jackson and Teal'c are awarded by President Kinsey for making first contact with the Aschen on P4C-970, an alliance that has proved fruitful, in many respects, since.
2001 - Before Major Pierce's unit can visit P4C-970 to determine if it is the Aschen homeworld, the President orders the mission scrubbed.