Cygnus
the Swan
Star chart
J2000the Swan
Fixed J2000 coordinates
This image was made with reference to IAU charts.View IAU original · Opens in a new tab
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How to read this chart
Dots mark stars, and their sizes indicate brightness. Stars appear dark on light charts and light on dark charts. Green lines show a constellation pattern. The surrounding grid gives right ascension and declination.
This is a fixed reference map, rather than a view of tonight’s sky.
Read the full chart guide →Boundary coordinates
The boundary marks a sky region; it is separate from the green star pattern. These files preserve ordered coordinate points in the J2000 reference system.
Cygnus33 boundary pointsDownload TXT →
View coordinate format & sample
Right ascension uses hours, minutes and seconds. Declination is in degrees. Convert right ascension to degrees with 15 × (hours + minutes/60 + seconds/3600).
RA (h m s) | Dec (degrees) | Abbreviation 19 20 31.8351 | 27.7324085 | CYG 19 20 22.8606 | 30.2321968 | CYG 19 26 23.7066 | 30.2493153 | CYG 19 25 58.2251 | 36.7487144 | CYG 19 28 28.7173 | 36.7558022 | CYG
The 0h / 24h meridian is continuous. A coordinate jump there should not be treated as a straight line across a flat map.