An outer retrograde satellite of Jupiter, distance 23 848 000 km; also known as Jupiter IX. It orbits Jupiter in 753.2 days at an inclination of 158° to the planet's equator. Its diameter is 28 km, making it the second-largest member of the Pasiphae irregular group of Jovian satellites. Sinope was discovered in 1914 by the American astronomer Seth Barnes Nicholson (1891–1963).
Subjects: Astronomy and Astrophysics.