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Cepheus Constellation
Constellation Cepheus the King of Ethiopia Star Map

Cepheus, the King of Ethiopia (Cep)

(see-FEE-us)


The Northern constellation of Cepheus, the King of Ethiopia, is best viewed in Fall during the month of October. It's brightest star is Alderamin at magnitude 2.45. The boundary of the Cepheus constellation contains 3 stars that host known exoplanets.

Cepheus 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.

Orange hypergiant RW Cephei is the 5th largest known star in the universe at 1,500 times the size of the Sun.

      1. Pronunciation:
      2. see-FEE-us
      1. Meaning:
      2. King of Ethiopia
      1. Genitive:
      2. Cephei
      1. Abbreviation:
      2. Cep
      1. Constellation Family:
      2. Perseus
      1. Hemisphere:
      2. Northern
      1. Quadrant:
      2. NQ4
      1. Best viewing month*:
      2. October
      1. Circumpolar** (N=northern, S=southern):
      2. N circumpolar
      1. Right Ascension (avg):
      2. 22h 25m
      1. Declination (avg):
      2. 72° 34'
      1. Brightest star:
      2. Alderamin  (2.45)
      1. Stars with planets:
      2. 3
      1. X-ray stars:
      2. 4 (2 binaries) stars



    Brightest Stars in Cepheus

    The 10 brightest stars in the constellation Cepheus by magnitude.

        1. Star
        2. Magnitude
        3. Spectral class



      Double Stars in Cepheus

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

          1. Star system
          2. Magnitudes
          3. Type
          1. Beta Cephei
          2. 3.2, 8.6
          3. double
          1. Struve 2816
          2. 5.7, 7.5, 7.5
          3. triple
          1. Xi Cephei
          2. 4.5, 6.4
          3. double
          1. Delta Cephei
          2. 4.2, 6.1
          3. double



        Star Clusters in Cepheus

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

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



          Nebulae in Cepheus

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

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



            Exoplanets in Cepheus

            These are the most notable named exoplanet systems known in the constellation Cepheus. Bear in mind that we will likely discover billions of exoplanets in the years to come. Also see all exoplanets.

                1. Host star name
                2. Exoplanet name

              * For southern latitudes, flip the season listed. For example, if a constellation is listed as best viewed in the summer in the month of July, in the southern hemisphere the constellation would be best viewed in the winter in January and would be upside-down.

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