Ida Galaxy
THE STARGATE OMNIPEDIA
IDA GALAXY
The location of at least one Asgard planet, Othalla. Ida is presumed to be the Asgard's home galaxy.

KEY EPISODE(S) -
The Fifth Race - Colonel O'Neill is drawn to Othalla in the galaxy of Ida by the Ancients' knowledge that had been downloaded into his brain.
Small Victories - Major Carter returns to the Asgard's galaxy with Thor, helping the Asgard to stop a Replicator invasion of Thor's home planet.
Unnatural Selection - After a tow from the Asgard, SG-1 takes the Prometheus to the Asgard world Halla to try and trap the Replicators there.