Lupus is a constellation in the southern hemisphere. Its name means "wolf" in Latin. It was originally listed as a constellation by the Greek astronomer Ptolemy in the 2nd century CE. The stars of Lupus were once considered to be part of the constellation Centaurus
, where they represented an animal being impaled on a pole by the centaur, who was holding it toward the constellation Ara
("altar") as though he were about to sacrifice it.
The Greek astronomer Hipparch separated the constellation from Centaurus and named it Therion ("beast") in the 2nd century BC, but it wasn't until Ptolemy's work was translated into Latin that the constellation was identified with the wolf. Ancient Babylonians called the constellation Ur-Idim ("wild dog").
The constellation Lupus lies between Centaurus
and occupies an area of 334 square degrees. It contains two stars with known planets. It can be seen at latitudes between +35° and -90° and is best visible at 9 p.m. during the month of June.
Lupus contains about 30 stars of second and third magnitude, but does not have any first magnitude ones. The brightest star in the constellation is 
alpha Lupi, a blue giant classified as a Beta Cephei variable. It belongs to the Scorpius-Centaurus Association, the nearest stellar association to our solar system. The Chinese know the star as Yang Mun or Men ("the south gate").
beta Lupi is also a blue giant. It lies approximately 524 light-years from Earth and is also known by the name Ke Kwan ("the cavalry officer") in China.
gamma Lupi is a binary star with another blue giant as the primary component, and 
delta Lupi is a blue-white subgiant, also classified as a Beta Cephei variable.
Lupus is home to a number of notable clusters and other deep sky objects. NGC 5824 and NGC 5986 are two globular clusters, discovered by James Dunlop in the 19th century. The dark nebula IC B 228, a cloud of dust and gas blocking light, lies close to NGC 5986.
NGC 5882 is another planetary nebula, located near the centre of the constellation. NGC 5822 is a large open cluster containing about a hundred stars, located near 
zeta Lupi. NGC 5749 is another open cluster that can be spotted to the south of Lupus. To the west of the constellation, there are two spiral galaxies and IC 4406, a ring-type planetary nebula notable for the number of hot Wolf-Rayet stars it contains.
Lupus was also the site of the brightest stellar event ever observed, the supernova SN 1006, which was seen in the year 1006. The supernova occurred approximately 7,200 light-years away and was said to have appeared 2.5 - 3 times the size of the disc of Venus. It could also be seen during the day. Some sources claim that it was large and bright enough to cast shadows.
Lupus belongs to the Hercules family of constellations, along with Hercules
, Corona Australis
, Triangulum Australe
Constellations directly bordering Lupus are Norma