Figure 6-35Mercury and the Far Side of Our Moon Mercury and our Moon are shown here to the same size scale. Mercury’s radius is 2439 km (1515 mi) and the Moon’s is 1738 km (1080 mi). For comparison, the distance from New York to Los Angeles is 3944 km (2451 mi). Mercury’s surface is more uniformly cratered than that of the Moon. Daytime temperatures at the equator on Mercury reach 700 K (800°F), hot enough to melt lead or tin.