About image
NGC 925 is a barred spiral galaxy in the constellation Triangulum.
It has an apparent size of 10.5'x5.9', which at its distance of 28 million light years corresponds to a real diameter of 86,000 light years: it is therefore a little smaller than our Milky Way (which has an extension of 100,000 years light).
This galaxy has some peculiarities compared to other barred spirals: the central bar has a blue instead of yellow coloration and does not show traces of a bright and compact nucleus. Furthermore, one of the two spiral arms is more developed than the other and shows innumerable HII regions.
All this suggests a possible interaction that occurred in the past with another galaxy, bringing NGC 925 closer to irregular galaxies than to barred ones.
NGC 925 is part of a group of galaxies called the “NGC 1023 Group” which includes NGC 1023 in Perseus and also NGC 891 in Andromeda plus other minor galaxies.
(text adapted from Wikipedia/The Cambridge photographic atlas of galaxies)
Note: unfortunately the image shown here show some artifacts, due probably to an automatic heavy compression during the loading on the hosting site.
I've tried to load the image in different formats/resolutions but the issue is currently still present. So don't enlarge the image too much :-)
Technical data
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 36x300" bin3 -15C
R 18x300" bin3 -15C
G 17x300" bin3 -15C
B 18x300" bin3 -15C
Total integration 7h25'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8,
Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L 21.1
Location Promiod (Aosta
Valley, Italy), own remote observatory
Date 3/18 October 2022