158 Koronis

158 Koronis ("kuh ROE niss") is a Main belt asteroid. It is an S-type asteroid.

It was discovered by Viktor Knorre on January 4, 1876 from the Berlin observatory. It was the first of his four asteroid discoveries.

The asteroid itself may not be spectacular, but the Koronidian family of asteroids named after it is one of the most important. One member of the family, 243 Ida, has been visited by spacecraft, and gives some idea of how the other asteroids in the family may look.

Based on a model constructed from the lightcurve, the shape of Koronis resembles that of Ida, although it is a bit larger [http://www.astro.helsinki.fi/~kaselain/asteroids.html] .