M57, the Ring Nebula

About image

The Ring Nebula (also known as M 57 or NGC 6720) is a planetary nebula visible in the boreal constellation of Lyra.
It is about 2000 light years from Earth and has a diameter of about two light years: the nebula is illuminated by a central white dwarf of magnitude 15.75. 

With short photographic exposures, only the central ring structure is visible, hence the name of the nebula. 

With deeper images like this, it is also possible to reveal the red-colored gaseous shell surrounding the ring structure.

Technical data
Optic           GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount         10Micron GM2000 HPSII
Camera          ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters       Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted RGB, Astrodon 50mm narrowband filters Ha 5nm and OIII 5nm
Guiding system     ZWO OAG-L with guide camera ASI 174MM
Exposure details   R 33x60" bin3 -20C
                          G 33x60" bin3 -20C
            B 33x60" bin3 -20C

            Ha 63x300" bin3 -15C

                 OIII 58x300" bin3 -15C
Total integration    11h44'
Acquisition        Voyager, PHD2
Processing        Pixinsight 1.8, Photoshop CS5
SQM-L         21.1    
Location         Promiod (Aosta Valley, Italy), own remote observatory
Date            23/24/26 March 2022, 24/27/30/31 July 2022

© Roberto Marinoni 2019 - All rights reserved