176 Iduna
Appearance
Orbital characteristics 1 | |
---|---|
Orbit type | Main belt |
Semimajor axis | 3.196 AU |
Perihelion distance | 2.679 AU |
Aphelion distance | 3.714 AU |
Orbital period | 5.71 years |
Inclination | 22.54° |
Eccentricity | 0.162 |
Physical characteristics 1 | |
Diameter | 121 km |
Rotation period | 11.289 hours |
Spectral class 5 | G |
Abs. magnitude | 7.90 |
Albedo 4 | 0.083 |
History 2 | |
Discoverer | C. H. F. Peters, 1877 |
176 Iduna is a large main-belt asteroid. It has a composition similar to that of the largest main-belt asteroid, 1 Ceres.
It was discovered by C. H. F. Peters on October 14, 1877, in Clinton, New York. It is named after the Ydun, a club in Stockholm that hosted an astronomical conference.
An occultation of a star by Iduna was observed from Mexico on January 17, 1998.