Sh2-170
About image
Sh2-170 is an emission nebula in Cassiopea constellation, located at about 7500 light years.
Quite faint in RGB, it becomes more interesting with narrowband filters.
For this image I used Ha and OIII filters for the nebula, while RGB exposures were used only for the stars; interesting the central region, where there is a strong emission from OIII.
Technical data
Optic Astrograph Newton Artec 200 E - Aperture 200mm, focal lenght 912mm, f/4.5
Mount Skywatcher EQ6R
Camera ZWO ASI 294MM Pro with external filter wheel 7 positions
Filters Antlia 36mm RGB, Ha/OIII 3.5nm
Guiding system Artesky Ultraguide 60 MKII
Exposure details R 19x120" bin2 -15C gain 0
G 19x120" bin2 -15C gain 0
B 20x120" bin2 -15C gain 0
Ha 96x300" bin2 -15C gain 120
OIII 45x300" bin2 -15C gain 120
Total integration 13h41'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, NoiseXTerminator, StarXTerminator, BlurXTerminator
SQM-L 20.64
Location Promiod (Aosta Valley, Italy)
Date 14 September/31 October/1 November/10 November 2024
© Roberto Marinoni 2019 - All rights reserved