Abbreviation: Â Eri
English Name: Â The River
Hemisphere:Â Â Southern HemisphereÂ (Parts visible from the UK.)
Location:Â Between the constellations of Lepus and Cetus.
Visible between latitudes: Â +60 and -90 degrees
Best season: Winter
Seen in three seasons:Â Autumn, Winter and Spring
Best seen in:Â December
Seen between:Â November and January
Right Ascension (RA):Â 03 hour
Declination (DEC):Â -20 degrees
Area (square degrees): Â 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 OrionÂ 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.
- AchernarÂ (Alpha Eri)
- CursaÂ (Beta Eri)
- ZaurakÂ (Gamma Eri)
- RanaÂ (Delta Eri)
- ZibalÂ (Zeta Eri)
- AzhaÂ (Eta Eri)
- Acamar (Theta 1 Eri)
- BeidÂ (Omicron 1 Eri)
- KeidÂ (Omicron 2 Eri)
- AngetenarÂ (Tau 2 Eri)
- TheemimÂ (Upsilon 2 Eri)
- SceptrumÂ (53 Eri)
- Photo of the constellation;Â Eridanus, as it appears to the naked eye. (Lines have been added for clarity.)
- Sky Chart Â – Â Eridanus
- List of stars in Eridanus.
Back toÂ The 88 Constellations ListsÂ page.