CREATE TABLE table_10932739_2 (orbital_period VARCHAR, semimajor_axis___au__ VARCHAR)

How long is the orbital period for the planet that has a semimajor axis of 5.20 au?
SELECT orbital_period FROM table_10932739_2 WHERE semimajor_axis___au__ = "5.20"
SELECT "orbital_period" FROM "table_10932739_2" WHERE "5.20" = "semimajor_axis___au__"