SkyEye

Eridanus

The River

Abbreviation: Eri
Genitive: Eridani
Origin: [antiquity]

The constellation of Eridanus

One Greek myth associates this river with the path followed by Phaëton when he attempted to drive his father Helios' sky chariot. Phaëton couldn't control the chariot and it veered wildly in all directions, scorching heaven and earth. Zeus, king of the gods, struck Phaëton dead with a thunderbolt. Phaëton fell to earth and his body landed in the Po River, which is called Eridanos in ancient Greek.

This is one of the largest of the modern constellations and is the 'tallest', spanning nearly 60° in declination. A number of obsolete constellations have borrowed stars from it in the past, including Psalterium Georgii and Sceptrum Brandenburgicum (see below).

Notable Features

Designation Name Description
α Eri Achernar The brightest star in the constellation is actually first magnitude.
β Eri Cursa
γ Eri Zaurak
ε Eri Ran This is one of the closest stars to the Sun and one of the few nearby stars that is visible to the naked eye. It is known to have at least one exoplanet.
ζ Eri Zibal
η Eri Azha
θ1 Eri Acamar Acamar appears as a binary star through a telescope. It sometimes appears as Dalim (from the Arabic al‑ẓalīmān meaning 'the two male ostriches') in older star atlases and catalogues.
ο1 Eri Beid
ο2 Eri Keid A telescope reveals that Keid is a multiple star system.
τ2 Eri Angetenar
υ2 Eri Theemin
υ3 Eri Beemim
53 Eri Sceptrum The name of this star is taken from the name of the obsolete constellation Sceptrum Brandenburgicum of which it was the brightest member.
CD−23 1056 Koeia This tenth-magnitude star is known to have at least one exoplanet.
CD−30 1812 Montuno This tenth-magnitude star is known to have at least one exoplanet.
HD 18742 Ayeyarwady This eighth-magnitude star is known to have at least one exoplanet.
HD 30856 Mouhoun This eighth-magnitude star is known to have at least one exoplanet.
WASP-22 Tojil This twelfth-magnitude star is known to have at least one exoplanet.
WASP-50 Chaophraya This twelfth-magnitude star is known to have at least one exoplanet.