Caelum
Caelum is a Southern Hemisphere constellation otherwise known as the Chisel. It is one of fourteen new constellations created by French astronomer Abbe Nicolas Louis de Lacaille (Wikipedia) in the 1750s, from his star catalog observations from the Cape of Good Hope and published posthumously in Coelum Australe Stelliferum in 1763.Caelum remains one of the 88 modern constellations defined by the International Astronomical Union (Wikipedia).
Caelum (abbrev. = Cae; genitive = Caeli) covers 125 square degrees or 0.30% of the celestial sphere making it the 81st largest constellation. It contains 20 stars brighter than apparent magnitude 6.5, the brightest star being Alpha Caeli.
For more information see the entries for Caelum at Wikipedia and U. Wisconsin. For a chart of Caelum, see Cae (IAU).