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Eridanus Constellation
Constellation Eridanus the River Star Map

Eridanus, the River (Eri)

(ih-RID-un-us)


The constellation of Eridanus, the River, is best viewed in Winter during the month of December. It's brightest star is Achernar at magnitude 0.46. The boundary of the Eridanus constellation contains 26 stars that host known exoplanets.

      1. Pronunciation:
      2. ih-RID-un-us
      1. Meaning:
      2. River
      1. Genitive:
      2. Eridani
      1. Abbreviation:
      2. Eri
      1. Constellation Family:
      2. Heavenly Waters
      1. Hemisphere:
      2. Southern
      1. Quadrant:
      2. SQ1
      1. Best viewing month*:
      2. December
      1. Right Ascension (avg):
      2. 3h 53m
      1. Declination (avg):
      2. -17° 59'
      1. Brightest star:
      2. Achernar  (0.46)
      1. Stars with planets:
      2. 26


    Double Stars in Eridanus

    These are the brightest and easiest-to-find double, triple, and quadruple star systems in the constellation Eridanus .

        1. Star system
        2. Magnitudes
        3. Type
        1. 32 Eridani
        2. 4.8, 5.9
        3. double
        1. 55 Eridani
        2. 6.7, 6.8
        3. double


      Nebulae in Eridanus

      The most notable, famous, and easy-to-find nebulae in the constellation Eridanus :

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


        Exoplanets in Eridanus

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

            1. Host star name
            3. 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).