<P> Perseus is bordered by Aries and Taurus to the south , Auriga to the east , Camelopardalis and Cassiopeia to the north , and Andromeda and Triangulum to the west . Covering 615 square degrees , it ranks twenty - fourth of the 88 constellations in size . It appears prominently in the northern sky during the Northern Hemisphere 's spring . Its main asterism consists of 19 stars . The constellation 's boundaries , as set by Eugène Delporte in 1930 , are defined by a 26 - sided polygon . In the equatorial coordinate system , the right ascension coordinates of these borders lie between 01 29.1 and 04 51.2 , while the declination coordinates are between 30.92 ° and 59.11 ° . The International Astronomical Union ( IAU ) adopted the three - letter abbreviation `` Per '' for the constellation in 1922 . </P>
<P> Perseus is bordered by Aries and Taurus to the south , Auriga to the east , Camelopardalis and Cassiopeia to the north , and Andromeda and Triangulum to the west . Covering 615 square degrees , it ranks twenty - fourth of the 88 constellations in size . It appears prominently in the northern sky during the Northern Hemisphere 's spring . Its main asterism consists of 19 stars . The constellation 's boundaries , as set by Eugène Delporte in 1930 , are defined by a 26 - sided polygon . In the equatorial coordinate system , the right ascension coordinates of these borders lie between 01 29.1 and 04 51.2 , while the declination coordinates are between 30.92 ° and 59.11 ° . The International Astronomical Union ( IAU ) adopted the three - letter abbreviation `` Per '' for the constellation in 1922 . </P>
when is the constellation perseus visible in the northern hemisphere
when is the constellation perseus visible in the northern hemisphere
during the Northern Hemisphere 's spring
during the Northern Hemisphere 's spring