Radiator with reduced solar irradiation and improved guidance system for geostationary satellite

A satellite configured to be stationed in geostationary orbit around a planet in a plane that is inclined relative to the ecliptic plane, the satellite comprising a radiator comprising:

• at least one panel having at least one radiative surface extending perpendicularly to a radiation axis, the panel being mounted so as to pivot relative to said radiation axis,
• a mounting foot carrying the panel, and
• a motor suitable for rotating the mounting foot about a rotation axis,
• wherein the radiation axis and the rotation axis are tilted relative to each other by an operating angle corresponding to the angle of inclination of the satellite's orbital plane relative to the ecliptic plane, such that for any rotation of the mounting foot about the rotation axis, the radiative surface remains parallel to the ecliptic plane,
• and wherein the radiator further comprises a guidance system for the panel, limiting rotation of the panel about the rotation axis, so as to maintain the panel in a given orientation relative to the satellite,
• wherein the panel guidance system comprises a connecting arm connecting the panel to the satellite, mounted so as to pivot relative to the satellite about a first axis, and mounted so as to pivot relative to the panel about a second axis concurrent with the first axis at a meeting point coincident with a point of intersection between the radiation axis and the rotation axis.