M 67

About image

M67 is an open cluster in Cancer constellation. It has a diameter of 30’ and it is not so much showy like other open clusters, due also to its low stars concentration. Indeed it is an interesting object because it is one of the oldest cluster in our galaxy, with an estimated age of 3.2 billion of years: in addition, it is not darkened by interstellar dust. For these reasons it was widely studied in the past by astronomers to investigated about its stellar population, but also recently (2006) it was studied and several X rays sources were found inside it (info from Wikipedia).

Technical data
Optic       Tecnosky Apo refractor LT 130-910mm f/7
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 18x120" + 24x60" bin1 -15C

         G 19x120" + 24x60" bin1 -15C
            B 19x120" + 24x60" bin1 -15C
Total integration       3.1h
Acquisition                Voyager, PHD2
Processing                Pixinsight 1.8, Photoshop CS5
SQM-L                       18.5    
Location                    Rescaldina (Italy), home terrace
Date                          17/18 March 2020

© Roberto Marinoni 2019 - All rights reserved