Asteroid 17, Thetis, discovered April 17, 1852 by Robert Luther at Dusseldorf, Germany. It has a period of 3 years, 324 days and is 90.04 kilometers (just under 56 miles) in diameter.
It was named for Thetis, wife of King Peleus of Thessaly and mother of Achilles.
Thetis Bringing The Armor To Achilles ,an 1804 painting by American-born British artist Benjamin West
The meaning of asteroid Thetis seems to be: "there are no guarantees"; weakness, perception of weakness, "all too human," overprotectiveness, hidden flaw, Murphy's Law, desire to control or manage, need to "let it be."