43 Ariadne is a fairly large and bright main-belt asteroid.

It was discovered by N. R. Pogson on 15 April 1857 and named after the Greek heroine Ariadne.

Ariadne is very elongate (almost twice as long as its smallest dimension) and probably bi-lobed[4] or at least very angular.

43 Ariadne was in a study of asteroids using the Hubble FGS.

Asteroids studied include (63) Ausonia, (15) Eunomia, (43) Ariadne, (44) Nysa, and (624) Hektor.