CIRS

class astropy.coordinates.CIRS(*args, **kwargs)

Bases: astropy.coordinates.BaseCoordinateFrame

A coordinate or frame in the Celestial Intermediate Reference System (CIRS).

This frame has one frame attribute:

• obstime

  The time at which the observation is taken. Used for determining the position of the Earth and its precession.

Parameters:

representation : BaseRepresentation or None

A representation object or None to have no data (or use the other keywords)

ra : Angle, optional, must be keyword

The RA for this object (dec must also be given and representation must be None).

dec : Angle, optional, must be keyword

The Declination for this object (ra must also be given and representation must be None).

distance : Quantity, optional, must be keyword

The Distance for this object along the line-of-sight. (representation must be None).

Attributes Summary

default_representation
frame_specific_representation_info
name
obstime

Attributes Documentation

default_representation

frame_specific_representation_info

name = 'cirs'

obstime = <Time object: scale='utc' format='jyear_str' value=J2000.000>