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| Abbreviation: Eri |
| English Name: The River |
| Genitive: Achernar |
| Hemisphere: Northern and Southern Hemisphere. (Bold means the more area in square feet in Southern Hemisphere.) |
| 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 (map) and January (map) |
| Seen between: November and January |
| Right Ascension (RA): 03 hour |
| Declination (DEC): -20 degrees |
| Area (square degrees): 1,138 (6th) |
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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.
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Messier Objects in Eridanus
| No Messier objects in Eridanus |
| s. |
More objects in Eridanus
| Select Catalog | No of Objects |
| Barnard (B) | 0x object |
| Caldwell (C) | 0x object |
| Collinder (Cr) | 0x object |
| New General Catalogue (NGC) | 328x objects |
| Index Catalogue (IC) | 110x objects |
| Sharpless (Sh2) | 0x object |
Features of Interest
- NGC 1535 – planetary nebula; very similar to Eskimo Nebula in Gemini (NGC 2392), bluish double-shell structure.
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Named Stars
- 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)
- more list of stars in Eridanus
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Planetarium / Constellation Map
| Live constellation visible from the UK :- Planetarium (Eridanus) | Best Seen in: December (map) and January (map) | Seen between: November and January |
IAU Sky Chart: Eridanus
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Constellations – Visible from the UK
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Parts visible from the UK
| Antlia | Columba | Eridanus | Fornax | Microscopium | ||
| Piscis Austrinus | Puppis | Pyxis | Sagittarius | Scorpius | ||
| Sculptor |
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Constellations: Southern Celestial Hemisphere
…..– never seen from the UK
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