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176 Iduna

176 Iduna
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. 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.


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