NationMaster - Encyclopedia: 176 Iduna

**176 Iduna**
Orbital characteristics ^{1 (ftp://ftp.lowell.edu/pub/elgb/astorb.html)}
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 (ftp://ftp.lowell.edu/pub/elgb/astorb.html)}
Diameter	121 km
Rotation period	11.289 hours
Spectral class ^{5 (http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT)}	G
Abs. magnitude	7.90
Albedo ^{4 (http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html)}	0.083
History ^{2 (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html)}
Discoverer	C. H. F. Peters, 1877

176 Iduna is a large main belt asteroid. 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. 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.

This astronomy article is a stub. You can help Wikipedia by expanding it (http://en.wikipedia.org/w/index.php?title=176_Iduna&action=edit).

Categories: Astronomy stubs | Main Belt asteroids

Results from FactBites:

176 Iduna - Academic Kids (101 words)
	176 Iduna is a large main belt asteroid.
	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.

More results at FactBites »

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