FK4¶

class astropy.coordinates.FK4(*args, **kwargs)[source] [edit on github]¶

A coordinate or frame in the FK4 system.

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).

equinox : astropy.time.Time, optional, must be keyword

The equinox of this frame.

obstime : astropy.time.Time, optional, must be keyword

The time this frame was observed. If None, will be the same as equinox.

Attributes Summary

`default_representation`
`frame_specific_representation_info`
`name`
`obstime`

Attributes Documentation

equinox = <Time object: scale='tai' format='byear_str' value=B1950.000>¶