The solar noon occurs every 176 Earth-days, and the planet is at perihelion when solar noon occurs over the Caloris Basin.
The only probe to explore this planet was a fly-by of Mariner 10 on March 29, 1974. The solar noon occurs every 176 Earth-days, and the planet is at perihelion when solar noon occurs over the Caloris Basin. Adding insult to injury, as the planet approaches perihelion, apparent solar motion slows, stops, reverses briefly, stops again, and then finally heads toward sunset. FTP identify this planet, whose weak magnetic field is thought to have been induced by the planet's relatively large solid iron core in close proximity to the Sun.
The only probe to explore this planet was a fly-by of Mariner 10 on March 29, 1974.
Mercury