|English name||Rule or Square|
|No star of the constellation exceeds the magnitude 3,5.|
|Description||Small constellation of the southern hemisphere, to the southwest of Scorpius.
Norma contains some interesting double stars: eta Normae, two independent yellow stars, easily separable also to the naked eye; epsilon Normae, a system constituted by four stars; and iota Normae, observable with small telescopes.
In the southern part of the constellation there is NGC 6087, an open cluster of about 35 stars scattered on a rather vast area, visible with binoculars.
|The constellation was drawn by Nicolas Louis de La Caille in 1756. It represents the square and the rule of a draftsman.
Norma doesn't possess the stars alpha and beta, since after the times of La Caille there were some changes of border: today the stars, which according to the French astronomer were the Norma's principal stars, are part of Scorpius.