@property<EOL><INDENT>def orb(self):<DEDENT>
return self._orb<EOL>
Property of dictionary for orbital parameters.

        orb contains: (for more information see :class:`~climlab.solar.orbital.OrbitalTable`)

        * ``'ecc'`` - eccentricity [unit: dimensionless]
        * ``'long_peri'`` - longitude of perihelion (precession angle) [unit: degrees]
        * ``'obliquity'`` - obliquity angle [unit: degrees]

        :getter:    Returns the orbital dictionary which is stored in attribute
                    ``self._orb``.
        :setter:    * sets orb which is addressed as ``self._orb`` to the new value
                    * updates the parameter dictionary ``self.param['orb']`` and
                    * calls method :func:`_compute_fixed`
        :type:      dict