Category:International prototype of the kilogram

**International Prototype of the Kilogram**
	physical artifact that formerly defined the kilogram unit of mass
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	Wikipedia
Instance of	artificial physical object; international measurement standard (–2019);
Part of	International System of Units (redefinition of SI base units, –2019);
Made from material	platinum (0.9); iridium (0.1);
Location	Pavillon de Breteuil, Château de Saint-Cloud, Saint-Cloud, Hauts-de-Seine, Île-de-France, Metropolitan France, France
Commissioned by	General Conference on Weights and Measure;
Has use	international measurement standard (mass, redefinition of SI base units, 1899–2019);
Maintained by	International Bureau of Weights and Measures;
Manufacturer	Johnson Matthey;
Inception	1799 (prototype); 1879 (production); 1889 (ratification);
Significant event	ratification (1899); verification (weight, 1, 1899); verification (weight, 2, 1948); verification (weight, 3, 1989); deprecation (redefinition of SI base units, 2019);
Mass	1 kg;
Diameter	39.17 mm;
Height	39.17 mm;
	official website
Authority file
	Q3738063;
	Reasonator; Scholia; Wikidocumentaries; PetScan; statistics; WikiMap; Locator tool; KML file; Search depicted;

Media in category "International prototype of the kilogram"

The following 9 files are in this category, out of 9 total.