NGC 6939 in Cepheus and NGC 6946 in Cygnus

NGC 6939 is an open cluster in Cepheus and NGC 6946

is known as the Fireworks Galaxy in Cygnus because

so many supernovae occur there.  Notice all

the dust in this area of the sky.

Hover over the picture for an annotated version

Date:  1 October 2021

FOV:  cropped to 68' × 45'; the angular size of NGC 6946 is about 11.5' × 9.8'

Telescope:  Stellarvue SVX102T + SFFX-1 flattener (714mm, f/7)

Guiding:  ZWO ASI120MM mini mono guide camera,

Stellarvue F050G 50mm guide scope

Computer:  ASIair pro Raspberry Pi

Mount:  iOptron CEM40

Camera:  ZWO ASI071MC Pro Cooled (0°C) Color CMOS with gain 180

Filter:  Baader Light Pollution Moonglow filter with IR cut

Stacking:  Fifty-seven 200 second frames using Deep Sky Stacker

Total Time:  3 hours 10 minutes

Processing:  Pixinsight – SPCC, DBE, SPCC, BlurXT, NoiseXT, MStr, GHS, HST,

PixelMath MStr + GHS + HST, HDR8_2, StarXT,

Bill Blanshan Star Reduction, Sat, Scale

Location:  Darling Hill Observatory near Vesper, NY