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M3 - a dog's dinner, 


            Tom Gray

M3 - a dog's dinner

Technical card

Imaging telescopes or lenses: Meade 2080 SCT 8" LX5

Imaging cameras: Meade DSI 3 Pro

Mounts: Meade Fork mount w/wedge Meade

Guiding telescopes or lenses: Meade 8x50mm Finder/Guider

Guiding cameras: Orion Starshoot autoguider

Software: SiliconFields / Ivo Jager Startools v1.7  ·  Stark Labs Nebulosity v3  ·  PHD2 Guiding V 2.6  ·  Meade Envisage V4.10

Filters: Meade RGB-IR Cut 1.25"  ·  Meade LRGB 1.25"

Accessory: Bahtinov Mask  ·  Homemade ST4 autoguider  ·  Finder guider 8x50 Finder Scope

Dates:Feb. 27, 2021

Frames: 78x60"

Integration: 1.3 hours

Avg. Moon age: 14.93 days

Avg. Moon phase: 99.97%

Basic astrometry details job: 4263625

Resolution: 1296x1008

Locations: Home 'observatory' (Bortle 5), Derbyshire, United Kingdom

Data source: Backyard


I was reluctant to post this 'dog's dinner', but as is my way, I use Astrobin as a record of most of my mistakes, as well as my achievements. Certainly not my best, nor the worst - I'd encourage you to have a look at Scott's @wsg image from the same moonlit night - a much better representation of this venerable 'old dog'.

Charles Messier's first, discounted object, was resolved by William Herschel in 1784. It is very much older at ~8-11 billion years, and lies 38,000 LY away. It is made up of many ageing golden stars, as well as variable stars and, in Hubble images, 'blue stragglers'. The former are well represented in my image, but not much else is discernible.

Fortunately this object is visible throughout the spring and early summer, so plenty of opportunity to teach an old dog new tricks!