| Orbital characteristics 1 | |
|---|---|
| Orbit type | Main belt |
| Semimajor axis | 2.898 AU |
| Perihelion distance | 2.643 AU |
| Aphelion distance | 3.152 AU |
| Orbital period | 4.93 years |
| Inclination | 11.51° |
| Eccentricity | 0.088 |
| Physical characteristics 1 | |
| Diameter | 101 km |
| Rotation period 3 | 27.8 hours |
| Abs. magnitude | 9.07 |
| Albedo 4 | 0.041 |
| History 2 | |
| Discoverer | C. H. F. Peters, 1878 |
191 Kolga is a large and extremely dark main-belt asteroid.
It was discovered by C. H. F. Peters on September 30, 1878, in Clinton, New York. It is named after Kolga, the daughter of Ægir in Norse mythology.
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