Cassiope

Cassiope is a constellation in the northern sky, named after Cassiopeia, the queen of Aethiopia in Greek mythology. It is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and it remains one of the 88 modern constellations defined by the International Astronomical Union. Cassiope is visible year-round in most of the Northern Hemisphere, and it is also visible at some point of the year in the Southern Hemisphere.

The constellation is easily recognizable due to its distinctive "W" or "M" shape, formed by five bright stars: Schedar, Caph, Gamma Cassiopeiae, Ruchbah, and Segin. The constellation is home to several notable deep-sky objects, including the open star cluster Messier 52 and the emission nebula IC 59 and IC 63. Cassiope is also notable for its variable star, Delta Cassiopeiae, which is one of the brightest stars in the night sky.

Cassiope is located in the first quadrant of the northern hemisphere (NQ1) and can be seen at latitudes between +90° and -20°. The right ascension is approximately 1h 00m and the declination is +60°. Cassiope is bordered by the constellations Cepheus, Perseus, Andromeda, and Lacerta. Its area is 598 square degrees, making it the 25th largest constellation in the sky.