Delphinus is a Northern Hemisphere constellation otherwise known as the Dolphin. It is one of the 48 Greek constellations originally described by the 2nd century astronomer Claudius Ptolemy (Wikipedia). Delphinus remains one of the 88 modern constellations defined by the International Astronomical Union (Wikipedia).

Delphinus (abbrev. = Del; genitive = Delphini) covers 189 square degrees or 0.46% of the celestial sphere making it the 69th largest constellation. It contains 44 stars brighter than apparent magnitude 6.5, the brightest star being Rotanev. See the Delphinus Star Chart for a figure illustrating this constellation including the identification of its brighter stars.

For more information see the entries for Delphinus at Wikipedia and U. Wisconsin. For a chart of Delphinus, see Del (IAU).

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