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| 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 | GG-type asteroid is a subdivision of C-type asteroids distinguished spectrally by differences in the ultraviolet absorption. The most notable asteroid in this class is 1 Ceres. You can use the "What links here" toolbox link to find asteroids of this type. |
| Abs. magnitudeIn astronomy, absolute magnitude is the apparent magnitude, m an object would have if it were at a standardized distance away. It allows the overall brightnesses of objects to be compared without regards to distance. Absolute Magnitude for stars M In stel | 7.90 |
| AlbedoNote: This article discusses the physical or planetological property of albedo. For other usage, see Albedo (disambiguation). The albedo is a measure of reflectivity of a surface or body. It is the ratio of electromagnetic radiation reflected to the amoun 4 | 0.083 |
| History 2 | |
| Discoverer | C. H. F. PetersChristian Heinrich Friedrich Peters ( September 19, 1813 July 18, 1890) was an American astronomer, and one of the first to discover asteroids. Not to be confused with the German astronomer Christian August Friedrich Peters (1806 1880). He was born in Sch, 1877Events January 1 Queen Victoria proclaimed Empress of India by the Royal Titles Act, introduced by United Kingdom Prime Minister Benjamin Disraeli. January 8 Crazy Horse and his warriors fight their last battle with the United States Cavalry ( Montana) Ja |
176 Iduna is a large main belt asteroidAn asteroid is a small, solid object in our Solar System, orbiting the Sun. An asteroid is an example of a minor planet (or planetoid , which are much smaller than planets. The asteroids are believed to be remnants of the protoplanetary disc which were no. It has a similar composition to the largest main belt asteroid, 1 Ceres.
It was discovered by C. H. F. Peters on October 14, 1877 and named after Idun, the Norse goddess of fertility.
An occultation of a star by Iduna was observed from Mexico on January 17, 1998.