About image
The spiral galaxy NGC 6946, located on the border between Cygnus and Cepheus constellation, is one of the closest neighbours of the Local Group, being its distance from the Milky Way only 18 million light years.
Due to its small inclination with respect to our point of view, it shows a detailed view of many active HII regions inside its spiral arms.
This galaxy is also known as “Fireworks Galaxy” due to the several supernova exploded in the latest 100 years (10 supernova from 1917 to 2017)
Technical data
Optic GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm,
f/8
Mount 10Micron GM2000 HPSII
Camera Moravian G3-16200 with external filter wheel 7
positions
Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB and Ha 5nm
Guiding system OAG Moravian M68 with guide camera Moravian
G1-0301
Exposure details L 28x600" bin2 -20C
R 15x600" bin2 -20C
G 14x600" bin2 -20C
B 11x600" bin2 -20C
Ha 20x600" bin2 -20C
Total integration 14h40'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5
SQM-L 21.3
Location Promiod (Aosta Valley, Italy), own remote
observatory
Date 9/11/17/20 July, 8 August 2021