Hypnos comes from the name of his Latin counterpart, Somnus. (in- "not" + somnus "sleep"), as well as a few less-common words such as "somnolent", meaning sleepy or tending to cause sleep and hypersomnia meaning excessive sleep, which can be caused by many conditions (known as secondary hypersomnia) or a rare sleep disorder causing excessive sleep with unknown cause, called Idiopathic Hypersomnia. 3D model of "Bronze head of Hypnos" via laser scan of a cast of British Museum's bronze. Hypnos In Greek mythology, Hypnos (; , "sleep") is the personification of sleep; the Roman equivalent is known as Somnus. In the
14827 Hypnos with respect to the ecliptic. It is frequently perturbed by Jupiter. The body's observation arc begins at Anderson Mesa Station the night prior to its official discovery observation at Palomar. As a near-Earth object and potentially hazardous asteroid "Hypnos" has an Earth minimum orbital intersection distance of , which corresponds to 5.7 lunar distances. In 1958, "Hypnos" passed less than 0.03 AU from both Earth and Mars. Neither planet has been approached so closely by "Hypnos" since the 862 AD pass of Earth, or will be until the 2214 pass of Earth. It is also a Mars-crosser. "Hypnos" may be