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🌎 Location: Greenwich, United Kingdom [change]
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Cassiopeia (The Seated Queen)

Cassiopeia (pronounced ˌkæsioʊˈpiːə) is the Latin name of a large constellation (in fact it extends itself for about 40 degrees across the sky) situated close to the northern celestial pole. As such, it is visible for most part of the year from the northern hemisphere.

In English language this constellation is also known as "The Seated queen" while in astronomical texts and literature this constellation is often abbreviated as "Cas" (according to the standard of the International Astronomical Union - IAU) or as "Cass" (according to a naming convention used by NASA).

The Latin genitive of the constellation name is "Cassiopeiae" (pronounced ˌkæsioʊˈpiːiː) and it is used to identify some of the brightest stars in this constellation based on the Bayer or Flamsteed star naming convention. For instance: α Cassiopeiae (the brightest star of Cassiopeia based on the Bayer catalog); or 23 Cassiopeiae (the 23th star in the constellation of Cassiopeia based on the Flamsteed catalog).

Cassiopeia is above the horizon from Greenwich, United Kingdom [change]. Altitude: 61°.
Available Resources for Cassiopeia

Sky chart of Cassiopeia from your location

Here we provide a simplified sky chart of the Cassiopeia constellation. Alternatively it is possible to locate Cassiopeia in the night sky using our Online Interactive Planetarium.

Chart of  constellation
This constellation image is derivatve work based on original work by IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg) CC-BY-3.0.

Visibility of Cassiopeia from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Cassiopeia is circumpolar and transits at 08:38 UTC (altitude: 80.0°)

The rise and set times provided here are just directional indications and they refer to a point approximately placed at the center of the constellation. In case of very large constellations (like Cassiopeia actually is) these times can have little relevance.

Top bright stars in Cassiopeia

The table below lists the top 20 brightest stars in the Cassiopeia constellation. See also the complete list of 160 stars brighter than magnitude 6.5 (approximate) in the constellation of Cassiopeia. Click on each star to see more details about it.

HR Number(*) Star designation Proper name Visual magnitude Color Notes
HR168 α Cassiopeiae Schedar 2.23 Variable; Multiple;
HR21 β Cassiopeiae Caph 2.27 Variable; Double;
HR264 γ Cassiopeiae 2.47 Variable; Multiple;
HR403 δ Cassiopeiae Ruchbah 2.68 Variable; Double;
HR542 ε Cassiopeiae Segin 3.38 Variable;
HR219 η Cassiopeiae Achird 3.44 Multiple;
HR153 ζ Cassiopeiae Fulu 3.66 Variable;
HR580 50 Cassiopeiae 3.98
HR130 κ Cassiopeiae 4.16 Variable;
HR343 θ Cassiopeiae 4.33 Variable; Double;
HR707 ι Cassiopeiae 4.52 Variable; Multiple;
HR575 48 Cassiopeiae 4.54 Variable; Multiple;
HR193 ο Cassiopeiae 4.54 Variable; Double;
HR9045 ρ Cassiopeiae 4.54 Variable;
HR265 υ2 Cassiopeiae Castula 4.63
HR442 χ Cassiopeiae 4.71
HR123 λ Cassiopeiae 4.73 Double;
HR399 ψ Cassiopeiae 4.74 Multiple;
HR9066 4.8 Variable; Multiple;
HR179 ξ Cassiopeiae 4.8 Variable;
...go to the complete list of 160 bright stars in the constellation of Cassiopeia

(*) HR stands for Harvard Revised Bright Star Catalogue, which is also known as the Yale Catalogue of Bright Stars.

Top deep sky objects in Cassiopeia

The table below lists the 20 brightest deep sky objects in the Cassiopeia constellation. See also the complete list of 56 deep sky objects in the constellation of Cassiopeia. The list includes objects from the Messier, New General Catalogue (NGC) and Index Catalogue (IC).

Name Type Magnitude
NGC 457 (Owl Cluster) Open Cluster 6.4 (V)
NGC 129 Open Cluster 6.5 (V)
IC 1848 Star Cluster + Nebula 6.5 (V)
IC 1805 Star Cluster + Nebula 6.5 (V)
NGC 654 Open Cluster 6.5 (V)
NGC 7789 Open Cluster 6.7 (V)
NGC 1027 Open Cluster 6.7 (V)
Messier 52 (The Scorpion) Open Cluster 6.9 (V)
NGC 225 Open Cluster 7 (V)
NGC 663 Open Cluster 7.1 (V)
Messier 103 Open Cluster 7.4 (V)
NGC 659 Open Cluster 7.9 (V)
NGC 637 Open Cluster 8.2 (V)
NGC 7790 Open Cluster 8.5 (V)
NGC 189 Open Cluster 8.8 (V)
NGC 436 Open Cluster 8.8 (V)
H21 Open Cluster 9 (V)
NGC 146 Open Cluster 9.1 (V)
...go to the complete list of 56 deep sky objects in the constellation of Cassiopeia