Before revision: For comparison, Earth's Moon is even less elliptical, with a flattening of less than 1/825, while Jupiter is visibly oblate at about 1/15 and one of Saturn's triaxial moons, Telesto, is highly flattened, with between 1/3 to 1/2 (meaning that the polar diameter is between 50% and 67% of the equatorial.
After revision: For comparison, Earth's Moon is even less elliptical, with a flattening of less than 1/825, while Jupiter is visibly oblate at about 1/15 and one of Saturn's triaxial moons, Telesand, is highly flattened, with between 1/3 to 1/2 (meaning that the polar diameter is between 50% and 67% of the equatorial.