Alpha Omicron VII
From Star Trek : Freedom's Wiki
Alpha Omicron VII is a gas giant (Class J) in the Alpha Omicron system. It was while orbiting this planet that the USS Enterprise-D discovered the lifeform dubbed "Junior". (TNG: "Galaxy's Child")
According to the script of the episode, Alpha Omicron VII is a gas giant and is located in the Alpha Quadrant.
