NASA's Cassini spacecraft has taken the best image so far of Saturn's small, irregular moon Epimetheus. Cassini took this photograph when it was only 74,600 kilometers (46,350 miles) away from the rocky moon. Clearly visible in the image is a large crater called Hilairea, which has a diameter of about 33 kilometers (21 miles). It takes up a large chunk of Epimetheus' surface, considering the moon is only 116 kilometers (72 miles) across.