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21 Lutetia is a large asteroid in the asteroid belt of an unusual spectral type. It measures about 100 kilometers in diameter (120 km along its major axis). It was discovered in 1852 by Hermann Goldschmidt, and is named after Lutetia, the Latin name of the city that stood where Paris was later built.

Lutetia has an irregular shape and is heavily cratered, with the largest impact crater reaching 45 km in diameter. The surface is geologically heterogeneous and is intersected by a system of grooves and scarps, which are thought to be fractures. It has a high average density, meaning that it is made of metal-rich rock.

The Rosetta probe passed within {{safesubst:#invoke:convert|convert}} of Lutetia in July 2010.<ref name=BBC/> It was the largest asteroid visited by a spacecraft until the Dawn mission arrived at Vesta in July 2011.


21 Lutetia sections
Intro  Discovery and exploration  Characteristics  Surface features and nomenclature  Origin  See also  References  External links  

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{{#invoke:Infobox|infobox}}

21 Lutetia is a large asteroid in the asteroid belt of an unusual spectral type. It measures about 100 kilometers in diameter (120 km along its major axis). It was discovered in 1852 by Hermann Goldschmidt, and is named after Lutetia, the Latin name of the city that stood where Paris was later built.

Lutetia has an irregular shape and is heavily cratered, with the largest impact crater reaching 45 km in diameter. The surface is geologically heterogeneous and is intersected by a system of grooves and scarps, which are thought to be fractures. It has a high average density, meaning that it is made of metal-rich rock.

The Rosetta probe passed within {{safesubst:#invoke:convert|convert}} of Lutetia in July 2010.<ref name=BBC/> It was the largest asteroid visited by a spacecraft until the Dawn mission arrived at Vesta in July 2011.


21 Lutetia sections
Intro  Discovery and exploration  Characteristics  Surface features and nomenclature  Origin  See also  References  External links  

PREVIOUS: IntroNEXT: Discovery and exploration
<<>>