|Properties of the orbit ( animation )|
|Orbit type||Main belt asteroid|
|Major semi-axis||3.189 AU|
|Perihelion - aphelion||2.66 AU - 3.718 AU|
|Inclination of the orbit plane||22.6 °|
|Length of the ascending node||200.7 °|
|Argument of the periapsis||187.1 °|
|Time of passage of the perihelion||December 14, 2013|
|Sidereal period||5 a 254 d|
|Mean orbital velocity||16.6 km / s|
|Medium diameter||(121.0 ± 2.2) km|
|Rotation period||11.3 h|
|Absolute brightness||7.9 likes|
|Date of discovery||October 14, 1877|
|Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.|
(176) Iduna is an asteroid of the outer main asteroid belt , which was discovered by Christian Heinrich Friedrich Peters in New York on October 14, 1877 . The heavenly body was named after Idun , the goddess of youth from Nordic mythology .
Iduna moves at a distance of 2.7 ( perihelion ) to 3.7 ( aphelion ) astronomical units around the sun in 5.7 years . The orbit is strongly inclined towards the ecliptic at 22.5 ° , the orbit eccentricity is 0.16. Iduna has a diameter of about 120 kilometers. It has a dark carbonaceous surface with an albedo of 0.08. It rotates on its own axis in around 11.3 hours.
- (176) Iduna in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).