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Contains:  M 71, NGC 6838
Getting plate-solving status, please wait...
Messier 71, 


            Mark Spruce
Messier 71

Messier 71

Technical card

Resolution: 1379x1031

Dates:Oct. 3, 2016

Frames: 18x600"

Integration: 3.0 hours

Avg. Moon age: 2.26 days

Avg. Moon phase: 5.67% job: 3273155

RA center: 19h 53' 49"

DEC center: +18° 46' 44"

Pixel scale: 1.058 arcsec/pixel

Orientation: 274.028 degrees

Field radius: 0.253

Locations: Observatory, Wolverhampton, West Midlands, United Kingdom

Data source: Backyard


Messier 71 is a globular cluster in the constellation Sagitta. The cluster is at a distance of around 12,000 light years away from Earth and is approximately 27 light years across.

This is my first image using an Celestron Off-Axis Guider and it seems to have made a big difference to the overall result. Previously I could not have done 10 minute sub-frames without noticeable distortion of stars.



Mark Spruce
License: Attribution-NonCommercial-NoDerivs Creative Commons


  • Messier 71, 


            Mark Spruce
  • Final
    Messier 71, 


            Mark Spruce

Sky plot

Sky plot


Messier 71, 


            Mark Spruce