158 Koronis
| Orbital characteristics 1 | |
|---|---|
| Orbit type | Main belt (Koronis) |
| Semimajor axis | 2.867 AU |
| Perihelion distance | 2.705 AU |
| Aphelion distance | 3.030 AU |
| Orbital period | 4.86 years |
| Inclination | 1.00° |
| Eccentricity | 0.057 |
| Physical characteristics 1 | |
| Diameter | 35.4 km |
| Rotation period 3 | 14.218 hours |
| Spectral class | S |
| Abs. magnitude | 9.27 |
| Albedo 4 | 0.277 |
| History 2 | |
| Discoverer | V. Knorre, 1876 |
158 Koronis is a Main belt asteroid. It has a rather mundane size but very reflective surface. It is composed of silicate rock and metallic iron-nickel.
It was discovered by Viktor Knorre on January 4, 1876 from the Berlin observatory. It was first of his total of four asteroid discoveries.
The asteroid itself may not be spectacular, but the family of asteroids named after it is one of the most important.
One member of the family has been visited by spacecraft, 243 Ida. It gives some idea how the asteroid would look like. Based on the model constructed from the lightcurve, shape of Koronis resebles Ida's although it is a bit larger. [1]