Siegena (minor planet designation: 386 Siegena) is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of primitive carbonaceous material. It was discovered by Max Wolf on March 1, 1894, in Heidelberg. During 1999, the asteroid was observed occulting a star. The resulting chords provided a diameter estimate of 174 km. References External links Background asteroids Siegena Siegena C-type asteroids (SMASS) C-type asteroids (Tholen) 18940301