M 29

About image

M29 is a small (diameter 7’) open cluster in Cygnus constellation. It is characterized by the presence of 7 bright stars but the total number of stars is about 50. 

It is not so striking neither in photo nor at visual observation: the reason is the strong interstellar dust present in this part of the sky which absorb its light.
Also for this reason there is some uncertainty in the calculation of M29 distance: the value most accredited is about 7200 light years.

Technical data
Optic         Tecnosky Apo refractor LT 130-910 with Riccardi reducer 0.75x (focal lenght 692mm, f/5.3)
Mount       Skywatcher EQ8
Camera                      Atik 4000 with Starlight Xpress external filter wheel 5 positions
Filters                         Baader 50mm unmounted RGB  
Guiding system         Artesky Ultraguide 70mm 
Exposure details    R 22x300" bin1 -15C

         G 22x300" bin1 -15C
            B 22x300" bin1 -15C
Total integration       5h30'
Acquisition                Voyager, PHD2
Processing                Pixinsight 1.8, Photoshop CS5
SQM-L                       18.5    
Location                    Rescaldina (Italy), home terrace
Date                          9/11 July 2021

© Roberto Marinoni 2019 - All rights reserved