Cassiopeia (constellation)
constellation in the northern celestial hemisphere
Cassiopeia is a constellation in the northern sky. It was named after a queen in Greek mythology called Cassiopeia. It looks like a letter W or M, with five bright stars that make the W or the M shape. It has two very bright stars called ρ Cas and V509 Cas.
Constellation | |
Abbreviation | Cas |
---|---|
Genitive | Cassiopeiae |
Pronunciation | /ˌkæsi.əˈpiː.ə/ Cássiopéia, colloquially /ˌkæsiˈoʊpiː.ə/ Cássiópeia; genitive /ˌkæsi.əˈpiː.iː/ |
Symbolism | the Seated Queen |
Right ascension | 1 |
Declination | +60 |
Quadrant | NQ1 |
Area | 598 sq. deg. (25th) |
Main stars | 5 |
Bayer/Flamsteed stars | 53 |
Stars with planets | 5 |
Stars brighter than 3.00m | 4 |
Stars within 10.00 pc (32.62 ly) | 7 |
Brightest star | α Cas (Schedar) (2.15m) |
Messier objects | 2 |
Meteor showers | Perseids |
Bordering constellations | Camelopardalis Cepheus Lacerta Andromeda Perseus |
Visible at latitudes between +90° and −20°. Best visible at 21:00 (9 p.m.) during the month of November. |
In 1572, a supernova called Tycho's Star, or SN 1572, was seen in Cassiopeia by many people. The best time to look for Cassiopeia is in late fall (September and early November.)
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