97 Klotho (/ˈkloʊθoʊ/ KLOH-thoh) is a fairly large main-belt asteroid. While it is an M-type its radar albedo is too low to allow a nickel-iron composition. Klotho is similar to 21 Lutetia and 22 Kalliope in that all three are M-types of unknown composition. Klotho was found by Ernst Tempel on February 17 1868. It was his fifth and final asteroid discovery.
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