NGC 772 is a notable spiral galaxy in the constellation Aries.
Its apparent dimensions are 7.2'x4.3': considering that its estimated distance is 115 million light years, its real extension is 240,000 light years, more than double that of our Milky Way!
The galaxy displays an asymmetric spiral structure, dominated by a bright blue arm that contains almost all active regions with young stars.
NGC 772 is clearly interacting with the nearby and bright galaxy NGC 770: one of the effects of this interaction is a tidal tail that extends from NGC 770 in the opposite direction to NGC 772, clearly visible in the image.
Countless other galaxies are visible throughout the field, in addition to the faint IFN belonging to our galaxy.
Optic GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount 10Micron GM2000 HPSII
Camera ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details L 61x300" bin3 -15C
R 18x300" bin3 -15C
G 18x300" bin3 -15C
B 18x300" bin3 -15C
all gain 100
Total integration 9h35'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
Location Promiod (Aosta Valley, Italy), own remote observatory
Date 8/9/10 October 2023