On Oct 21, 10:44*pm, "Danilo Pivato" wrote:
I hope you will appreciate the enclosed picture taken out from a mosaic
of 20 images in Hydrogen-Alpha of the heart of Cygnus: from gamma to
eta Cygnus: :
The 20 images for mosaic have been composed with a program of
graphic elaboration.
These the technical data of resumption:

Coordinates of the center mosaic AR: 20h 12m 03s *e *Dec: +37° 47' 20"
Apparent total size: : *7° 31' x 6° 18'
Lens: Pentax SDUFII 100mm f/4
Ccd SBIG ST-10XME
Field: 1,4° x *2,1°
Filter H-Alpha 6,3nm
Total time of exposu 120 hours
Exposure time for each frame: 30 minutes
Number of nights of work 28
Total frame: 240
Start date: 2009.08.28
End date: *2009.10.13
The site: Roma (Italy)

For me this is one of the most beautiful in the northern sky because
rich star clusters, dust and hydrogen gas.
With my best regards,

*Danilo Pivatowww.danilopivato.com

Truly remarkable. Thankyou for sharing your amazing images.
The sheer number of stars visible is shocking.