Approaching Apollo Landing Site 2 in the southwestern Sea of Tranquility, still watching out of Neil Armstrong's window to his left (directly due West), with the RCS quad in the lower left corner. When this picture was made, the LM was still docked to the CSM. Landing Site 2 is located just right of center at the very edge of the terminator. Crater Maskelyne is the large one at the lower right, with Maskelyne B directly beyond. Hypatia Rille (U.S. Highway Number One) is at upper left, with the crater Moltke just to the right (north) of it. Sidewinder Rille and Diamondback Rille extend from left to right across the center of the picture. Maskelyne and Maskelyne B have a diameter of almost 24 and 9 km respectively, and the distance from the crater center of Maskelyne to the Apollo 11 landing site is about 210 km. While Moltke is a relatively small crater, with a diameter of merely 6.5 km, its very light ejecta blanket makes it easy to find for Earth-based observers with moderately sized telescopes, making it a popular landmark for locating Station Tranquilitatis.