ARP 184/NGC 1961

[tomato]

This one is a little off the beaten track but is currently well placed to get data at a high elevation. It is 180 million light years away and is the largest member of a group of 10 galaxies. The irregular form earned it an ARP classification but there is no indication of an interaction.  The upper most spiral arm has a concentration of hot blue stars and large HII regions whereas on the opposite side there is a more conventional arrangement of faint spiral arms.

Captured with the Esprit150/ASI178 dual rig as follows:

L 228 x 2 mins

R 67x 2 mins

G 60 x 2 mins

B 69 x 2 mins

All data binned 2x2 so imaging at 0.94" per pixel, 14.1 hrs integration. Calibrated and stacked in APP, processed in PI, with BXT/SXT/NXT utilised. I tried SPCC but CSC in APP seemed to give a better colour result, at least to my eye.

Thanks for looking.

 

Edited February 17, 2023 by tomato
Updated process of original data

[tony210]

Great image - beautiful complex galaxy.

[tomato]

Thanks Tony.  I think it really helps if you pick a subject with high elevation, but fortunately there dozens of galaxies in this size category so you can always find one that is well placed.

[Dan_Paris]

Beautiful image of this unusal galaxies with lot of inner details