The Laptev Sea (Russian: мо́ре Ла́птевых) is a marginal sea of the Arctic Ocean. It is located between the eastern coast of Siberia, Taimyr Peninsula, the Severnaya Zemlya and the New Siberian Islands. Its northern boundary passes from the Arctic Cape to point with coordinates 79°N and 139°E and closes at the Anisiy Cape . The sea area is approximately 672,000 km². It is named after Russian explorers Dmitry Laptev and Khariton Laptev. It is navigable during August and September.