 A foreground image and three long-exposure images were also included in the same frame, bringing the total number of exposures to 48.If marked to show the position of the Sun on it at fairly regular intervals (such as the 1st, 11th, and 21st days of every calendar month) the analemma summarises the apparent motion of the Sun, relative to its mean position, throughout the year.A date-marked diagram of the analemma, with equal scales in both north–south and east–west directions, can be used as a tool to estimate quantities such as the times of sunrise and sunset, which depend on the Sun's position.