Cassiopeia, the Mother of Andromeda (Cas)

(CASS-ee-uh-PEE-uh)

The Northern constellation of Cassiopeia, the Mother of Andromeda, is best viewed in Fall during the month of November. It's brightest star is Schedar at magnitude 2.24. The boundary of the Cassiopeia constellation contains 14 stars that host known exoplanets.

Cassiopeia is a circumpolar constellation, so is visible year-round in the Northern hemisphere. Conversely, it is not visible in the opposite hemisphere unless you are close to the equator.

1. Pronunciation:
2. CASS-ee-uh-PEE-uh

1. Meaning:
2. Mother of Andromeda

1. Genitive:
2. Cassiopeiae

1. Abbreviation:
2. Cas

1. Constellation Family:
2. Perseus

1. Hemisphere:
2. Northern

1. Quadrant:
2. NQ1

1. Best viewing month*:
2. November

1. Circumpolar** (N=northern, S=southern):
2. N circumpolar

1. Right Ascension (avg):
2. 0h 52m

1. Declination (avg):
2. 60° 18'

1. Meteor showers:
2. Perseids

1. Brightest star:
2. Schedar (2.24)

1. Stars with planets:
2. 14

1. X-ray stars:
2. 3 (pulsars) stars

1. Gamma-ray stars:
2. 1 stars

1. Caldwell catalog objects:
2. |

Brightest Stars in Cassiopeia

The 10 brightest stars in the constellation Cassiopeia by magnitude.

1. Star
2. Magnitude
3. Spectral class

1. Gamma Cassiopeiae (γ Cas)
2. 2.15
3. B0IV

1. Alpha Cassiopeiae (α Cas)
2. 2.24
3. K0II-IIIvar

1. Beta Cassiopeiae (β Cas)
2. 2.28
3. F2III-IV

1. Delta Cassiopeiae (δ Cas)
2. 2.68
3. A5Vv SB

1. Epsilon Cassiopeiae (ε Cas)
2. 3.35
3. B2pvar

1. Eta Cassiopeiae (η Cas)
2. 3.46
3. G0V SB

1. Zeta Cassiopeiae (ζ Cas)
2. 3.69
3. B2IV

1. 50 Cassiopeiae (50 Cas)
2. 3.95
3. A2V

1. Kappa Cassiopeiae (κ Cas)
2. 4.17
3. B1Ia

1. Theta Cassiopeiae (θ Cas)
2. 4.34
3. A7Vvar

Double Stars in Cassiopeia

These are the brightest and easiest-to-find double, triple, and quadruple star systems in the constellation Cassiopeia. Also see all star clusters.

1. Star system
2. Magnitudes
3. Type

1. Eta Cassiopeiae
2. 3.5, 7.4
3. double

1. Sigma Cassiopeiae
2. 5.0, 7.2
3. double

Star Clusters in Cassiopeia

The most notable and easy-to-find star clusters in the constellation Cassiopeia . Also see all star clusters.

1. Star cluster
2. Catalog #
3. Cluster type

1. Caroline's Rose
3. open

1. Messier 103
2. M103
3. open

1. Messier 52
2. M52
3. open

1. NGC 129
3. open

1. NGC 189
3. open

1. NGC 225
3. open

1. NGC 381
3. open

1. NGC 637
3. open

1. NGC 659
3. open

1. NGC 663
3. open

1. Owl Cluster
2. C13
3. open

Nebulae in Cassiopeia

Notable and easy-to-find nebulae in the constellation Cassiopeia . Also see all nebulae.

1. Nebula name
2. Catalog #
3. Nebula type

1. Bubble Nebula
2. C11
3. diffuse

1. Cassiopeia A
3. supernova remnant

1. Fish Head Nebula
3. emission

1. Heart Nebula
3. diffuse

1. Pacman Nebula
3. emission

1. Soul Nebula
3. emission

1. Tycho's Supernova
3. supernova remnant

Galaxies in Cassiopeia

The most notable, famous, and easy-to-find galaxies in the constellation Cassiopeia. Also see all galaxies.

1. Galaxy name
2. Alt name
3. Galaxy type

1. Maffei I
3. elliptical

1. Maffei II
3. spiral

Neutron Stars in Cassiopeia

These are the most well-known neutron stars in the constellation Cassiopeia. Although neutron stars cannot be seen in any amateur telescope, they are at the center of many supernova remnant nebulae, which can be seen. Also see all neutron stars.

1. Neutron star
3. Type

1. 3C 58
3. pulsar

1. Cas X-1
3. X-ray pulsar

* Constellation shown for northen hemisphere skies. For the southern hemisphere, constellations appear rotated 180 degrees (upside-down and left-right reversed) from what is shown. Remember that seasons are reversed too - summer in northern latitudes is winter in southern latitudes.

** Circumpolar constellations are visible year-round in the hemisphere listed (and not at all in the opposite hemisphere).