Hello Apod Grag!

Here is a picture of NGC891 galaxy i made on the 17/10/2017, with a Ritchey Chretien Telescope Astrosib 500mm f/8 and a CCD Camera Apogee U16000 in the Astroqueyras observatory in France.

Scale is : 0.46″/pixel
Seeing : 1-1.5″
Bortle : 1
Location :Pic du chateau renard, Hautes-Alpes, France
Date: 17/10/2017

Exposure : 2,8h
Luminance : 44x120s (1.4″ < FWHM < 2")
R filter : 15x120s
V filter : 11x120s
B filter : 11x120s

Processed with Pixinsight and Photoshop

Thanks and best regards,

Mathieu Guinot

Autore: Guinot (sito)