Cepheus Constellation
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Cepheus, the king, is a northern constellation named after the mythological king Cepheus of Ethiopia. It contains the star Alderamin, part of the northern sky's circumpolar stars.
Cepheus Rise and Set Timetable
| Time | Elevation | |
| Cepheus is always above the horizon | ||
Moonrise, 39.4% illuminated  | 11:55 | 20° |
| Sunset | 17:53 | 38° |
| Civil sunset | 18:21 | 40° |
| Twilight start | 18:54 | 43° |
| Moonset | 21:31 | 53° |
| Cepheus transit | 23:15 | 55° |
| Astronomical observing session begins | 02:28 | 48° |
| Cepheus is always above the horizon | ||
| Astronomical observing session ends | 03:28 | 43° |
| Civil sunrise | 04:01 | 41° |
| Sunrise | 04:29 | 39° |
Track Cepheus Position Throughout the Night
← 20 August 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Cepheus changing position in the night sky.
Nebulae in the constellation Cepheus
Annual motion of Cepheus
| Date | Fri, 21 August 2026 |
| Twilight start | 19:23 |
| Twilight end | 02:48 |
| Twilight duration | 7h 25m |
| Rise | Cepheus is always up |
| Set | Cepheus is always up |
| Elevation at transit | 55° |
| Transit time | 23:11 |
| Equatorial coordinates | RA: 22h 02m 10s", Dec: 72° 25' 31s |
| 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.