The constellation pictured is known as Eridanus. This constellation is located in the northern hemisphere. Eridanus represents a river, that is why it has no distinct shape. The constellation's name is the Ancient Greek name for the river Po in Italy. The constellation Eridanus is associated with the myth of Phaeton and is depicted as a river because it is the water flowing from the constellation Aquarius. Eridanus was first cataloged by the second century astronomer Ptolemy. This constellation contains a well-known star, Achernar. Eridanus also contains the Eridanus galaxies and the Witch Head nebula. This constellation the sixth largest constellation in the sky and is located in the southern hemisphere. This constellation contains a total of stars. Eridanus contains one of the largest supervoids ever discovered.
http://www.constellation-guide.com/constellation-list/eridanus-constellation/