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 Monument and Preserve of the Moon are under great environmental stress due to constant dry winds and heat-absorbing black lavas that tend to quickly sap water from living things. Summer soil temperatures often exceed and plant cover is generally less than 5% on cinder cones and about 15% over the entire monument. Adaptation is therefore necessary for survival in this semi-arid harsh climate. Water is usually only found deep inside holes at the bottom of blow-out craters. Animals therefore get the moisture they need directly from their food. The black soil on and around cinder cones does not hold moisture for long, making