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attoparsec

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List of unusual units of measurement
An unusual unit of measurement is a unit of measurement that does not form part of a coherent system of measurement; especially in that its exact quantity may not be well known or that it may be an inconvenient multiple or fraction of base units in such systems. This definition is deliberately not exact since it might seem to encompass units such as the week or the light-year which are quite "usual" in the sense they are often used; if they are used out of context, they may be "unusual", as demonstrated by the Furlong/Firkin/Fortnight (FFF) system of units.

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Attoparsec
Das Attoparsec (Abk. apc) ist eine ironisch verwendete Längeneinheit, die sich aus dem Einheiten-Präfix Atto- (10-18) und der astronomischen Einheit Parsec (ca. 3.26 Lichtjahre, bzw. ca. 3.086 x 1016m) zusammensetzt. Es beschreibt damit eine Länge von etwas mehr als 3 cm, was in grober Näherung dem im englischen Sprachraum weithin verwendeten Inch entspricht.

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attoparsec

attoparsec
about 31 mm (one inch). "atto-" is the standard si prefix for multiplication by 10^-18. a parsec (parallax-second) is 3.26 light-years; an attoparsec is thus 3.26 * 10^-18 light years. thus, one attoparsec per microfortnight is about one inch per second.



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attoparsec
n. About an inch. `atto-' is the standard SI prefix for multiplication by 10^(-18). A parsec (parallax-second) is 3.26 light-years; an attoparsec is thus 3.26 * 10^(-18) light years, or about 3.1 cm (thus, 1 attoparsec/microfortnight equals about 1 inch/sec). This unit is reported to be in use (though probably not very seriously) among hackers in the U.K. See micro-.


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