Temperature cloud diagram of the cometary nucleus surface with an ecliptic longitude of 70^° in the spin-vector coordinate of the rotation axis. The two solid red lines in the figure are the true anomaly equal to −9^° and 46.7^°, respectively, and the dashed blue line is the isotherm at the temperature of 208 K. Panels a-d: ecliptic latitude of the spin-vector coordinate of the rotation axis is 0^°, 25^°, 65^°, and 90^°, respectively.