Minor-planet moon Herculina does not have a significant satellite. There were other similar reports of asteroids having companions (usually referred to as satellites) in the following years. Also, a letter in "Sky & Telescope" magazine at this time pointed to apparently simultaneous impact craters on Earth (for example, the Clearwater Lakes in Quebec), suggesting that these craters were caused by pairs of gravitationally-bound objects. In 1993, the first asteroid moon was confirmed when the Galileo probe discovered the small Dactyl orbiting 243 Ida in the asteroid belt. The second was discovered around 45 Eugenia in 1998. In 2001, 617 Patroclus and its
Craters of the Moon National Wilderness Craters of the Moon National Wilderness The Craters of the Moon National Wilderness is located in the U.S. state of Idaho. The wilderness is managed by the National Park Service and is integral with Craters of the Moon National Monument. Set aside to protect volcanic features which ended 2,100 years ago, the wilderness has numerous lava flows, cinder cones and moon-like craters. The region was utilized by NASA to help prepare astronauts for moon walks as they believed that the region would provide a similar setting to what astronauts could expect to see on the moon. U.S. Wilderness Areas do