 Complete the following phrase:  Opportunity landed in Meridiani Planum at , about downrange east of its intended target on January 25, 2004 at 05:05. Although Meridiani is a flat plain, without the rock fields seen at previous Mars landing sites, Opportunity rolled into an impact crater 22 meters in diameter, with the rim of the crater approximately from the rover. NASA Scientists were so excited about landing in a crater that they called the landing a hole in one; however, they were not aiming for the crater and did not know it existed. Later, the crater was named Eagle crater and the landing site designated 