It is one of the brighter stars of the night sky and has a mass aproximatelly 12 times the mass of our sun.
On this photo we see the emmission nebulosity that covers most of the Cygnus constellation and the NGC6910 open cluster right next to Sadr.
Drassa-Greece 25th of july 2014 under a thin layer of clouds....
Total integration: 6 hours at -15°
This photo has been chosen as Amateur Astronomy Picture of the Day and can be seen here: ( AAPODx2 27-9-2014)
For a higher resolution you may also click on the photo below: