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# Auxprm

class astropy.wcs.Auxprm

  Bases: `object`

  Class that contains auxiliary coordinate system information of a specialist nature.

  This class can not be constructed directly from Python, but instead is returned from `aux`.

  Attributes Summary

  `a_radius` | `double` semimajor axis of the ellipsoid that defines the approximate shape of a target body used in projection (m).
  `b_radius` | `double` intermediate axis of the ellipsoid that defines the approximate shape of a target body used in projection (m).
  `bdis_obs` | `double` Distance between the centre of the celestial body and the observer (m).
  `blat_obs` | `double` Bodycentric latitude of the observer in the body-fixed reference frame of the target body (deg).
  `blon_obs` | `double` Bodycentric longitude of the observer in the body-fixed reference frame of the target body, spanning from 0 to 360 deg (deg).
  `c_radius` | `double` semiminor axis of the ellipsoid that defines the approximate shape of a target body used in projection (m).
  `crln_obs` | `double` Carrington heliographic longitude of the observer (deg).
  `dsun_obs` | `double` Distance between the centre of the Sun and the observer (m).
  `hgln_obs` | `double` Stonyhurst heliographic longitude of the observer.
  `hglt_obs` | `double` Heliographic latitude (Carrington or Stonyhurst) of the observer (deg).
  `rsun_ref` | `double` Reference radius of the Sun used in coordinate calculations (m).

  Attributes Documentation

  a_radius

    `double` semimajor axis of the ellipsoid that defines the approximate shape of a target body used in projection (m). If undefined, this is set to `None`.

  b_radius

    `double` intermediate axis of the ellipsoid that defines the approximate shape of a target body used in projection (m). If undefined, this is set to `None`.

  bdis_obs

    `double` Distance between the centre of the celestial body and the observer (m). If undefined, this is set to `None`.

  blat_obs

    `double` Bodycentric latitude of the observer in the body-fixed reference frame of the target body (deg). If undefined, this is set to `None`.

  blon_obs

    `double` Bodycentric longitude of the observer in the body-fixed reference frame of the target body, spanning from 0 to 360 deg (deg). If undefined, this is set to `None`.

  c_radius

    `double` semiminor axis of the ellipsoid that defines the approximate shape of a target body used in projection (m). If undefined, this is set to `None`.

  crln_obs

    `double` Carrington heliographic longitude of the observer (deg). If undefined, this is set to `None`.

  dsun_obs

    `double` Distance between the centre of the Sun and the observer (m). If undefined, this is set to `None`.

  hgln_obs

    `double` Stonyhurst heliographic longitude of the observer. If undefined, this is set to `None`.

  hglt_obs

    `double` Heliographic latitude (Carrington or Stonyhurst) of the observer (deg). If undefined, this is set to `None`.

  rsun_ref

    `double` Reference radius of the Sun used in coordinate calculations (m). If undefined, this is set to `None`.