NGC 1961
About image
NGC 1961 is a spiral galaxy in Camelopardalis constellation: it is located 180 million light years away and it is the largest member of a small group of ten galaxies (some are visibile in the image).
It is characterized by a large spiral arm, which contains many areas with hot blue stars and several Ha regions as visible in the image, while instead on the opposite side of the galaxy these structures are missing,
NGC 1961 is classified also like Arp 184, due to its perturbed appearance: however no indication of interaction was found till now.
It appears probably instead that NGC 1961 is an intruder inside the small galaxy group: upon entering the group, the galaxy piles up the gas, compressing it on its southern spiral arm and the leading to the observed perturbations in its spiral structure.
Technical data R 18x300" 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 50x300" bin3 -15C
G 18x300" bin3 -15C
B 18x300" bin3 -15C
Total integration 8h40'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L 21.06
Location Promiod (Aosta Valley, Italy), own remote observatory
Date 8 November, 15/17 December 2023
© Roberto Marinoni 2019 - All rights reserved