English Name: The River
Hemisphere: Southern Hemisphere (Parts visible from the UK.)
Location: Between the constellations of Lepus and Cetus.
Visible between latitudes: +60 and -90 degrees
Best season: Winter
Seen in three seasons: Autumn, Winter and Spring
Best seen in: December
Seen between: November and January
Right Ascension (RA): 03 hour
Declination (DEC): -20 degrees
Area (square degrees): 1,138 (6th)
Eridanus (The River)
- Long rambling constellation extends for nearly 60 degrees from north to south – the greatest range in declination (DEC) of any constellation that starts Cursa star in Eridanus; from the left foot of Orion in the north then eventually ends far to the south, at the border with Hydrus, where is the brightest star of Eridanus (Achernar) there.
- No Messier objects in Eridanus.
Features of Interest
- NGC 1535 – planetary nebula; very similar to Eskimo Nebula in Gemini (NGC 2392), bluish double-shell structure.
- Achernar (Alpha Eri)
- Cursa (Beta Eri)
- Zaurak (Gamma Eri)
- Rana (Delta Eri)
- Zibal (Zeta Eri)
- Azha (Eta Eri)
- Acamar (Theta 1 Eri)
- Beid (Omicron 1 Eri)
- Keid (Omicron 2 Eri)
- Angetenar (Tau 2 Eri)
- Theemim (Upsilon 2 Eri)
- Sceptrum (53 Eri)
- Photo of the constellation; Eridanus, as it appears to the naked eye. (Lines have been added for clarity.)
- Sky Chart – Eridanus
- List of stars in Eridanus.
Back to The 88 Constellations Lists page.