About image
M2 is the first globular cluster in Messier Catalogue, visible in Aquarius constellation
It is a remarkable object, with diameter of 16’ and visual magnitude of 6.3; it has a very bright core and this has obliged me to combine long and short exposures in order to not saturate it.
M2 is 37,500 light years from the Sun.
Technical data
Optic GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount 10Micron GM2000 HPSII
Camera Moravian G3-16200 with external filter wheel 7 positions
Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB
Guiding system OAG Moravian M68 with guide camera Moravian G1-0301
Exposure details L 15x120" + 10x10", bin2 -15C
R 15x120" + 10x10". bin2 -15C
G 15x120" + 10x10", bin2 -15C
B 15x120" + 10x10", bin2 -15C
Total integration 2,1h
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5
SQM-L 21.1
Location Promiod (Aosta Valley, Italy), own remote observatory
Date 24 August 2020