Eridanus Constellation
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Eridanus, the river, is a large constellation representing a river flowing from the foot of Orion towards the southern sky.
Eridanus Rise and Set Timetable
| Time | Elevation | |
Moonrise, 100% illuminated  | 17:35 | -74° |
| Astronomical observing session begins | 00:00 | -3° |
| Eridanus rise | 00:20 | |
| Astronomical observing session ends | 03:36 | 19° |
| Civil sunrise | 04:08 | 19° |
| Eridanus transit | 04:19 | 19° |
| Sunrise | 04:36 | 19° |
| Moonset | 05:04 | 19° |
| Eridanus set | 08:18 |
Track Eridanus Position Throughout the Night
← 28 August 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Eridanus changing position in the night sky.
Nebulae in the constellation Eridanus
Annual motion of Eridanus
| Date | Sat, 29 August 2026 |
| Twilight start | 19:09 |
| Twilight end | 02:57 |
| Twilight duration | 8h 48m |
| Rise | 00:16 |
| Set | 08:14 |
| Elevation at transit | 19° |
| Transit time | 04:15 |
| Equatorial coordinates | RA: 03h 38m 52s", Dec: -33° 15' 39s |
| Magnitude | - |
| Constellation |
The graph illustrates the constellation’s annual visibility pattern and its daily rise, set, and transit times throughout the year.
The vertical axis shows the hours of the day, while the horizontal axis spans the days of the year.
The reddish area marks when the constellation is above the horizon. The white line shows when it reaches its highest point in the sky. View detailed visibility information in a table with rise, transit, and set times for each date.
The vertical axis shows the hours of the day, while the horizontal axis spans the days of the year.
The reddish area marks when the constellation is above the horizon. The white line shows when it reaches its highest point in the sky. View detailed visibility information in a table with rise, transit, and set times for each date.
Acknowledgements
We gratefully acknowledge the International Astronomical Union (IAU) for defining and standardizing the official constellation boundaries used in celestial mapping.
Special thanks to Sky & Telescope Magazine and contributors Roger Sinnott and Rick Fienberg for producing the charts and tables. Alan MacRobert’s constellation patterns were influenced by the work of H. A. Rey and adjusted to align with earlier traditions.