Barnard 169-170-171
About image
Barnard 169-170-171 is a group of dark nebulas in Cepheus constellation, around 2.5° south of the well known nebula IC 1396.
I took this image from my home terrace under a Bortle 8 sky, by using simple RGB filters: even if the subject was quite high in the sky and I used a long hood, I had anyway big gradients on the final stacked images, so I had to manage them in post processing with some difficulties.
Technical data
Optic Tecnosky Apo refractor LT 130-910 with Riccardi reducer 0.75x (focal lenght 692mm, f/5.3)
Mount Skywatcher EQ8
Camera Moravian G3-16200 CCD with external filter wheel 7 positions
Filters Baader 50mm unmounted RGB
Guiding system Artesky Ultraguide 70mm
Exposure details R 57x120" bin1 -15C
G 54x120" bin1 -15C
B 55x120" bin1 -15C
Total integration 5h32'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, NoiseXTerminator, BlurXterminator, StarXTerminator
SQM-L 18.2
Location Rescaldina (Italy), home terrace
Date 30/31 August 2025
© Roberto Marinoni 2019 - All rights reserved