Stellarium  0.16.1
Equation of Time plug-in


class  EquationOfTimeWindow
 Main window of the Equation of Time plug-in. More...
class  EquationOfTime
 Main class of the Equation of Time plugin. More...

Detailed Description

The Equation of Time plugin shows the solution of the equation of time.

The equation of time describes the discrepancy between two kinds of solar time. These are apparent solar time, which directly tracks the motion of the sun, and mean solar time, which tracks a fictitious "mean" sun with noons 24 hours apart. There is no universally accepted definition of the sign of the equation of time. Some publications show it as positive when a sundial is ahead of a clock; others when the clock is ahead of the sundial. In the English-speaking world, the former usage is the more common, but is not always followed. Anyone who makes use of a published table or graph should first check its sign usage.


The plug-ins' configuration data is stored in Stellarium's main configuration file (section [EquationOfTime]).