located_on_astronomical_body gilbert 
Prometheus ( meaning " forethought ") is a ___MASK12___ in Greek mythology , best known as the deity in Greek mythology who was the creator of mankind and its greatest benefactor , who stole fire from Mount Olympus and gave it to mankind . Lobate debris aprons ( LDAs ) are geological features on ___MASK60___ , first seen by the Viking Orbiters , consisting of piles of rock debris below cliffs . These features have a convex topography and a gentle slope from cliffs or escarpments , which suggest flow away from the steep source cliff . In addition , lobate debris aprons can show surface lineations as do rock glaciers on the Earth . Gilbert is a large Martian crater located in the south of the planet in the area of Promethei Terra . It is one of several large craters in the heavily pock - marked upland region . It was named in 1973 in honour of American geologist Grove K . Gilbert . ___MASK60___ Reconnaissance Orbiter ( MRO ) is a multipurpose spacecraft designed to conduct reconnaissance and exploration of ___MASK60___ from orbit . The spacecraft was built by Lockheed Martin under the supervision of the Jet Propulsion Laboratory ( JPL ). The mission is managed by the California Institute of Technology , at the JPL , in La Cañada Flintridge , California , for the NASA Science Mission Directorate , Washington , D . C . It was launched August 12 , 2005 , and attained Martian orbit on March 10 , 2006 . In November 2006 , after five months of aerobraking , it entered its final science orbit and began its primary science phase . As MRO entered orbit , it joined five other active spacecraft that were either in orbit or on the planet ' s surface : " ___MASK60___ Global Surveyor ", " ___MASK60___ Express ", " 2001 ___MASK60___ Odyssey ", and the two ___MASK60___ Exploration Rovers (" Spirit " and " Opportunity "); at the time , this set a record for the most operational spacecraft in the immediate vicinity of ___MASK60___ . " ___MASK60___ Global Surveyor " and the " Spirit " rover have since ceased to function ; the remainder remain operational as of September 2016 . The Hellas quadrangle is one of a series of 30 quadrangle maps of ___MASK60___ used by the United States Geological Survey ( USGS ) Astrogeology Research Program . The Hellas quadrangle is also referred to as MC - 28 ( ___MASK60___ Chart - 28 ). The Hellas quadrangle covers the area from 240 ° to 300 ° west longitude and 30 ° to 65 ° south latitude on the planet ___MASK60___ . Within the Hellas quadrangle lies the classic features Hellas Planitia and Promethei Terra . Many interesting and mysterious features have been discovered in the Hellas quadrangle , including the giant river valleys Dao Vallis , Niger Vallis , Harmakhis , and Reull Vallis  all of which may have contributed water to a lake in the Hellas basin in the distant past . Many places in the Hellas quadrangle show signs of ice in the ground , especially places with glacier - like flow features . Promethei Terra is a large Martian region covering 3300 km at its broadest extent . It lies to the east of the massive Hellas basin . Like much of the southern part of the planet it is a heavily cratered , highland region . Promethei Terra was named for a classic albedo feature of ___MASK60___ , with the original name derived from that of the Greek god Prometheus . Promethei Terra lies mostly in the Hellas quadrangle of ___MASK60___ . Lobate debris aprons . One very important feature common in Promethei Terra are piles of material surrounding cliffs . These materials are called lobate debris aprons ( LDAs ). Recently , research with the Shallow Radar on the ___MASK60___ Reconnaissance Orbiter has provided strong evidence that the LDAs are glaciers that are covered with a thin layer of rocks . Large amounts of water ice are believed to be in the LDAs . Available evidence strongly suggests this area accumulated snow in the past . When the tilt ( obliquity ) of ___MASK60___ increases the southern ice cap releases large amounts of water vapor . Climate models predict that when this occurs water vapor condenses and falls where LDAs are located . The tilt of the earth changes little because our relatively large moon keeps it stable . The two tiny Martian moons do not stabilize its planet , so the rotational axis of ___MASK60___ undergoes large variations . It has been known for some time that ___MASK60___ undergoes many large changes in its tilt or obliquity because its two small moons lack the gravity to stabilize it , as our moon stabilizes Earth ; at times the tilt has even been greater than 80 degrees