SkyRef / Constellations

The Cygnus constellation

The Swan. Best placed in May. It sits well north on the sky and is comfortably placed for northern hemisphere observers.

Where and when

Also known asthe Swan
Best monthMay
Right ascension20.5h
Declination+50°
Line segments2

Finding it

Cygnus, known in English as the Swan, is centred near right ascension 20.5 hours, declination +50°. It sits well north on the sky and is comfortably placed for northern hemisphere observers.

It reaches its highest point in the sky around local midnight in May, which is when it is easiest to pick out. Earlier in the year it rises before dawn; later, it is already setting in the evening.

Bright stars in this part of the sky

StarDesignationMagnitude
Denebα Cyg1.25
Sadrγ Cyg2.20
Alderaminα Cep2.44
Gienahε Cyg2.46

Star patterns inside it

Not every shape people point out is a constellation. These are asterisms — patterns picked out of Cygnus by eye and by habit, with no official standing.

the Summer Trianglethe Northern Cross

See it on the live map

SkyRef draws Cygnus in its real position for wherever you are, right now, along with the other 88 IAU figures.

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Other constellations

AndromedaAntliaApusAquariusAquilaAraAriesAurigaBoötesCaelumCamelopardalisCancerCanes VenaticiCanis MajorCanis MinorCapricornusCarinaCassiopeiaCentaurusCepheusCetusChamaeleonCircinusColumbaComa BerenicesCorona AustrinaCorona BorealisCorvusCraterCruxCygnusDelphinusDoradoDracoEquuleusEridanusFornaxGeminiGrusHercules