# lux - to - vMag

vCalc Reviewed
E_v =
lux - to - vMag
Variable Instructions Datatype
Illuminance Enter illuminance as units of lux Decimal
Type
Equation
Category
Sciences->Astronomy
Contents
1 variables
Tags:
Rating
ID
vCalc.lux - to - vMag
UUID
47d7099a-ea1c-11e3-b7aa-bc764e2038f2

This equation computes the apparent magnitude (M_v) from the input illuminance (E_v) input as units of lux (lx).

Illuminance is the measure of the amount of light (luminous flux) incident on a surface.

Apparent Magnitude is a measure of a celestial body's brightness as seen by an observer on Earth.  The Apparent Magnitude is adjusted to the value it would be in the absence of atmosphere.