NationMaster - Encyclopedia: 142 Polana

**142 Polana**
Orbital characteristics ^{1 (ftp://ftp.lowell.edu/pub/elgb/astorb.html)}
Orbit type	Main belt (Polana)
Semimajor axis	2.418 AU
Perihelion distance	2.089 AU
Aphelion distance	2.747 AU
Orbital period	3.76 years
Inclination	2.24�
Eccentricity	0.136
Physical characteristics ^{1 (ftp://ftp.lowell.edu/pub/elgb/astorb.html)}
Diameter	55.3 km
Rotation period	9.764 hours
Spectral class	F
Abs. magnitude	10.27
Albedo ^{4 (http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html)}	0.045
History ^{2 (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html)}
Discoverer	J. Palisa, 1875

142 Polana is a very dark Main belt asteroid. It is a primitive carbonaceous asteroid of type F (a subdivision of more common C-type).

It is a major member of the Polana family, which is related to the Nysa family.

It was discovered by J. Palisa on January 28, 1875, and named after the city of Pola (now Pula, Croatia) where he made the discovery.

This article is a stub. You can help Wikipedia by expanding it (http://en.wikipedia.org/w/index.php?title=142_Polana&action=edit).

Categories: Stub | Main Belt asteroids

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