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Rowett Island is a rocky island 0.5 miles (0.8 km) long, lying immediately off Cape Lookout, Elephant Island, in the South Shetland Islands. Rowett Island is located at 61°17′S 55°13′W / 61.283°S 55.217°W. Rowett Island was known to both American and British sealers as early as 1822. Rowett Island was named by members of a British expedition (1921-1922) under Ernest Shackleton for John Quiller Rowett, chief patron of the expedition.