L-value, L value or lvalue may refer to: * In astronomy, a measure of brightness of a lunar eclipse on the

Danjon scale The Danjon scale is a five-point scale useful for measuring the appearance and luminosity of the Moon during a total lunar eclipse. It was proposed by André-Louis Danjon in 1921, when postulating that the brightness of a lunar eclipse was relat ...

* L-value (computer science), denoting an object to which values can be assigned * In number theory, the value of an L-function * In space physics, the value assigned to an

L-shell The L-shell, L-value, or McIlwain L-parameter (after Carl E. McIlwain) is a parameter describing a particular set of planetary magnetic field lines. Colloquially, L-value often describes the set of magnetic field lines which cross the Earth's ...

, a particular set of planetary magnetic field lines

See also