NGC 3631
About image
NGC 3631 is a spiral galaxy in Ursa Major, located at a distance of about 35 million light years from Earth, with a real extension of 60000 light years.
It is classified like a grand design spiral galaxy, that is a spiral galaxy with prominent and well-defined spiral arms: in this case, there are two principal spiral arms, which begin near the center and then branch into secondary arms with lower surface brightness.
Several HII regions are well visible (no Ha filter used, only normal RGB filters).
Technical data R 22x300" bin3 -15C all gain 100
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 69x300" bin3 -15C
G 22x300" bin3 -15C
B 22x300" bin3 -15C
Total integration 11h15'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L 21.20
Location Promiod (Aosta Valley, Italy), own remote observatory
Date 3/4 March 2025
© Roberto Marinoni 2019 - All rights reserved