NGC 604
About image
NGC 604 is a region of ionized hydrogen (H II) inside the Triangle Galaxy (M 33): it is well visible in every image of the galaxy like a big red spot toward the end of a spiral arm.
The image is a (R+Ha)GB combination merged with L exposures in order to keep some details of the galaxy: the processing was however focused on NGC 604 in order to pop up all its possible details, sacrificing a bit the rendition of the galaxy.
The image is a consistent crop of the original field.
Some notes on NGC 604 taken from Wikipedia:
NGC 604 is one of the largest H II regions of the Local group : inside it there are more than 200 newborn stars that ionize the gases of the nebula. Considering the estimated distance of the galaxy in which it resides (2.7 million light years), we obtain a diameter of 1500 light years for the widest part: it is therefore over 40 times larger than the visible part of the Orion nebula, and is even 6300 times brighter, so much so that if NGC 604 were at the same distance as the Orion nebula it would appear to us brighter than Venus.
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, Ha 5nm
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details L 49x300" bin3 -15C gain 100
R 14x300" bin3 -15C gain 100
G 14x300" bin3 -15C gain 100
B 14x300" bin3 -15C gain 100
Ha 69x300" bin3 -15C gain 100
Total integration 13h20'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, BlurXTerminator, NoiseXTerminator, StarXTerminator
SQM-L 19.99
Location Promiod (Aosta Valley, Italy), own remote observatory
Date 8/9/11/13 November 2025
© Roberto Marinoni 2019 - All rights reserved