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To help compare different orders of magnitude this page lists lengths between 10 and 100 kilometres (10 to 10 metres). The myriametre (sometimes also spelled myriameter, myriometre and myriometer) (10,000 metres) is a deprecated unit name; the decimal metric prefix myria- (sometimes also written as myrio-) is obsolete and not included among the prefixes when the International System of Units was introduced in 1960. ;Distances shorter than 10 kilometres Conversions 10 kilometres is equal to: * 10,000 metres * 6.2 miles * 1 mil (the Scandinavian mile), now standardized as 10 km: ** 1 mil, the unit of measure commonly used in Norway and Sweden used to be 11,295 m in Norway and 10,688 m in Sweden. * farsang, unit of measure commonly used in Iran and Turkey. Sports * 42.195 km - length of the marathon Human-defined scales and structures * 18 km - cruising altitude of Concorde * 27 km - circumference of the Large Hadron Collider, the largest and highest energy particle accelerator * 34.668 km - highest manned balloon flight (Malcolm D. Ross and Victor E. Prather on May 4, 1961) * 38.422 km - length of the Second Lake Pontchartrain Causeway in Louisiana, US * 39 km - undersea portion of the Channel tunnel * 53.9 km - length of the Seikan Tunnel, , the longest rail tunnel in the world * 77 km - Rough total length of the Panama Canal Geographical * 10 km - height of Mauna Kea in Hawaii, measured from its base on the ocean floor * 11 km - deepest known point of the ocean, Challenger Deep in the Mariana Trench * 11 km - average height of the troposphere * 21 km - length of Manhattan * 23 km - depth of the largest earthquake ever recorded in the United Kingdom, in 1931 at the Dogger Bank of the North Sea * 34 km - narrowest width of the English Channel at the Strait of Dover * 50 km - approximate height of the stratosphere Astronomical * 10 km - diameter of the most massive neutron stars (3-5 solar masses) * 13 km - mean diameter of Deimos, the smaller moon of Mars * 20 km - diameter of the least massive neutron stars (1.44 solar masses) * 20 km - diameter of Leda, one of Jupiter's moons * 20 km - diameter of Pan, one of Saturn's moons * 22 km - diameter of Phobos, the larger moon of Mars * 27 km - height of Olympus Mons above the Mars reference level, the highest known mountain of the Solar System * 43 km - diameter difference of Earth's equatorial bulge * 66 km - diameter of Naiad, the innermost of Neptune's moons ;Distances longer than 100 kilometres
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