About image
M74 is a spiral galaxy in Pisces constellation, with apparent magnitude 9.4.
Its distance fom Milky Way is 30 million light years, so considering its apparent dimensions of 10.5’x9.5’ its real extension is 92000 light years.
Due to its face-on view it is possible follow the spiral arms from the centre to the dim outer regions.
Several HII regions are visible in the arms: the largest one has a diameter of 600 light years.
(info from Wikipedia/Cambridge Photographic Atlas of Galaxies)
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
Guiding system OAG Moravian M68 with guide camera Moravian
G1-0301
Exposure details L 10x600" bin2 -20C + 19x600" bin2 -25C
R 10x600" bin2 -20C + 5x600" bin2 -25C
G 10x600" bin2 -20C + 4x600" bin2 -25C
B 10x600" bin2 -20C + 4x600" bin2 -25C
Total integration 12h
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, StarXTerminator, Topaz DenoiseAI
SQM-L 21.27
Location Promiod (Aosta Valley, Italy), own remote
observatory
Date 11 August, 10/14 October, 5 November 2021