Altair

Altair, designated P3X-989 by the Tau'ri, was a planet in the Milky Way galaxy which held a Stargate and was once home to the Altairans. It was decaying for some reason and was becming unsuitable for the humanoids that lived there. The dying residents instead built android replicas of as many of them as they could. When SG-1 arrived, the only android left was Harlan.