astropy:docs

Note

This is an old version of the documentation. See http://docs.astropy.org/en/stable for the latest version.

CIRS

class astropy.coordinates.CIRS(*args, **kwargs)[source] [edit on github]

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 str(object=’‘) -> string
obstime Represent and manipulate times and dates for astronomy.

Attributes Documentation

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

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