Which Planet’s moon is drifting away faster than expected?

Titan Is Drifting Away From Saturn 100 Times Faster Than Scientists Expected. Saturn’s Moon Titan Drifting Away Faster Than Previously Thought. Larger than the planet Mercury, huge moon Titan is seen here as it orbits Saturn. astronomers have found something really surprising: Titan’s outward migration is faster than expected – about 100 times faster. This suggests that the peculiar moon formed much closer to the planet during the birth of the Solar System 4.5 billion years ago, and in the intervening years has migrated out to a distance of around 1.2 million kilometres (746,000 miles) from the planet.