Eridanus (The River)
Eridanus (pronounced ɪˈrɪdənəs) is the Latin name of a large constellation (in fact it extends itself for about 91 degrees across the sky) situated close to the celestial equator. As such, it is at least partly visible from both hemispheres in certain times of the year.
In English language this constellation is also known as "The River" while in astronomical texts and literature this constellation is often abbreviated as "Eri" (according to the standard of the International Astronomical Union - IAU) or as "Erid" (according to a naming convention used by NASA).
The Latin genitive of the constellation name is "Eridani" (pronounced ɪˈrɪdənaɪ) 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 Eridani (the brightest star of Eridanus based on the Bayer catalog); or 23 Eridani (the 23th star in the constellation of Eridanus based on the Flamsteed catalog).
Sky chart of Eridanus from your location
Here we provide a simplified sky chart of the Eridanus constellation. Alternatively it is possible to locate Eridanus in the night sky using our Online Interactive Planetarium.
Visibility of Eridanus from your location
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 Eridanus actually is) these times can have little relevance.
Top bright stars in Eridanus
The table below lists the top 20 brightest stars in the Eridanus constellation. See also the complete list of 191 stars brighter than magnitude 6.5 (approximate) in the constellation of Eridanus. Click on each star to see more details about it.
|HR Number(*)||Star designation||Proper name||Visual magnitude||Color||Notes|
|HR1666||β Eridani||Cursa||2.79||⬤||Variable; Double;|
|HR1231||γ Eridani||Zaurak||2.95||⬤||Variable; Double;|
|HR897||θ1 Eridani||Acamar||3.24||⬤||Variable; Double;|
|HR1347||υ4 Eridani||3.56||⬤||Variable; Multiple;|
|HR1003||τ4 Eridani||3.69||⬤||Variable; Multiple;|
|HR566||χ Eridani||3.7||⬤||Variable; Double;|
|HR1463||ν Eridani||3.93||⬤||Variable; Double;|
|...go to the complete list of 191 bright stars in the constellation of Eridanus|
(*) HR stands for Harvard Revised Bright Star Catalogue, which is also known as the Yale Catalogue of Bright Stars.
Top deep sky objects in Eridanus
The table below lists the 20 brightest deep sky objects in the Eridanus constellation. See also the complete list of 425 deep sky objects in the constellation of Eridanus. The list includes objects from the Messier, New General Catalogue (NGC) and Index Catalogue (IC).