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12. class AltAz: Horizon coordinates

An instance of class AltAz represents a location in the sky relative to the observer's horizon. See Section 3.2, “Altazimuth coordinates”.

12.1. AltAz.__init__(): Constructor

The constructor call has this form:

AltAz(alt, az)

The altitude above the horizon in radians.


The azimuth angle in radians, where 0.0 is north, π/2 is east, and so on.

Instances have these attributes:


The altitude, normalized to [-π, π].


The azimuth, normalized to [0,2π).