This is an image of M22. It is a globular cluster about 10,000 light years away in the constellation Sagittarius. It has over 70,000 stars in a diameter of about 100 light years.

October 25, 2021

Location: Rio Hurtado, Chile

Telescope: Planewave CDK-24

Camera: FLI PL16803

Mount: Mathis MI-1000/1250

Luminance: 12x5 minutes (binned 1x1)

Red: 12x5 minutes (binned 1x1)

Green: 12x5 minutes (binned 1x1)

Blue: 12x5 minutes (binned 1x1)

Copyright 2021 Bernard Miller

Image Description and Details :

M22 might be the most famous northern globular cluster, if only it rose higher for people at mid-northern latitudes. It is beautifully set in the Milky Way in Sagittarius. It’s in the same league as M13 in terms of splashiness, even though it is dimmed by being so much lower in my sky. It’s among the nearest globulars, at around 10,600 light years from Earth, and it covers an area about the size of the full Moon in our sky. It is around 100 light years across and is pegged at around 12 billion years old.SBIG STL-11000M camera, Baader R, G and B filters, 10″ f/6.8 ASA astrograph, Paramount MX. Guided with QHY5 guide camera and 80 mm f/6 Stellar-Vue refractor. Acquisition, guiding and mount control with TheSkyX. Focusing with FocusMax. Automation with CCDCommander. All preprocessing and post-processing in PixInsight. Shot from my SkyShed in Guelph, Ontario. Acquired August 1-3, 2016. No moonlight, good to excellent transparency, and good to very good seeing throughout acquisition.8 x 5m R10x5m G10x5m BTotal: 2hr20m Image scale 1.1 arcsec per pixel



Copyright Information: Copyright Ron Brecher, 2020