Cygnus Constellation
Cygnus (The Swan)
Cygnus, or "The Swan," is a prominent and beautiful constellation in the northern sky. Its most recognizable feature is the asterism known as the "Northern Cross." Cygnus lies along the plane of the Milky Way, making it rich in stars, nebulae, and other celestial wonders. It is visible throughout the summer and autumn months in the Northern Hemisphere.
Key Features
- Bright Stars: Cygnus contains several notable stars:
- Deneb: The brightest star in Cygnus and one of the vertices of the Summer Triangle asterism. Deneb is a luminous blue supergiant located about 2,600 light-years away.
- Sadr: A bright star near the center of the Northern Cross, surrounded by a rich field of nebulae.
- Albireo: A stunning double star, often regarded as one of the most beautiful in the sky due to its contrasting golden and blue components.
- Deep-Sky Objects: Cygnus is a treasure trove for stargazers, containing:
- North America Nebula (NGC 7000): A large emission nebula resembling the shape of North America.
- Veil Nebula: A supernova remnant consisting of intricate filaments of glowing gas.
- Pelican Nebula (IC 5070): A bright emission nebula located near the North America Nebula.
- Cygnus X-1: One of the strongest X-ray sources in the sky and a well-known black hole candidate.
Mythological Background
In Greek mythology, Cygnus is associated with several stories involving swans. One version tells of Zeus transforming into a swan to seduce Leda, leading to the birth of Helen of Troy and the Dioscuri twins, Castor and Pollux. Another myth links Cygnus to the tragic story of Phaethon, the son of the Sun god Helios, whose friend Cycnus mourned his death and was transformed into a swan.
The swan also appears in other cultural traditions, symbolizing grace, beauty, and transformation. Its position along the Milky Way enhances its association with ethereal and otherworldly themes.
Cultural Significance
Cygnus is a key feature of summer and autumn skies and plays a prominent role in celestial navigation and amateur astronomy. Its inclusion of Deneb in the Summer Triangle makes it an essential constellation for locating other stars and constellations.
The rich array of deep-sky objects in Cygnus attracts astrophotographers and stargazers, offering stunning views of nebulae and star fields. Its mythological ties and visibility in the Milky Way region have cemented its place as one of the most fascinating constellations.
Cygnus Rise and Set Timetable
| Time | Elevation | |
| Cygnus Rise | 15:37 | |
| Sunset | 18:31 | 22° |
| Civil sunset | 19:03 | 27° |
Moon Rise, 99% illuminated  | 19:32 | 31° |
| Twighlight start | 19:42 | 33° |
| Astrosession begin | 21:53 | 55° |
| Cygnus Transit | 00:55 | 82° |
| Astrosession end | 02:41 | 69° |
| Civil sunrise | 03:20 | 62° |
| Sunrise | 03:52 | 56° |
| Moon Set | 05:11 | 42° |
| Cygnus Set | 10:13 |
Track Cygnus Position Throughout the Night
← Wed, 1 July 2026 →
| Time | |
| Altitude | |
| Azimuth |
Nebulae in the constellation Cygnus
Pelican Nebula (IC5070)
HII Ionized region
Cocoon Nebula (IC5146)
Star cluster + Nebula
Foxhead Cluster (NGC6819)
Open Cluster
Blinking Planetary (NGC6826)
Planetary Nebula
Crescent Nebula (NGC6888)
HII Ionized region
M29
Open Cluster
Fireworks Galaxy (NGC6946)
Galaxy
Veil Nebula (NGC6960)
Supernova remnant
Eastern Veil (NGC6992)
Supernova remnant
Eastern Veil (NGC6995)
Supernova remnant
North America Nebula (NGC7000)
HII Ionized region
M39
Open Cluster
Annual motion of Cygnus
| Date | Thu, 2 July 2026 |
| Twighlight start | 20:24 |
| Twighlight end | 01:56 |
| Twighlight duration | 6h 32m |
| Rise | 15:33 |
| Set | 10:09 |
| Elevation at transit | 82° |
| Transit time | 00:51 |
| Equatorial coordinates | RA: 20h 25m 12s", Dec: 45° 02' 26s |
| Magnitude | - |
| Constellation |
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the Cygnus is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit. You can also view detailed visibility information in a dedicated table, including exact 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, which provide a consistent framework for celestial mapping.
Special thanks to Sky & Telescope Magazine and contributors Roger Sinnott and Rick Fienberg for their collaboration in producing the charts and tables. The constellation patterns, drawn by Alan MacRobert, were influenced by the work of H. A. Rey and thoughtfully adjusted to align with earlier traditions.