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Contains:  M 71, NGC 6838
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M71 Angelfish Cluster, 


            Jirair Afarian
M71 Angelfish Cluster

M71 Angelfish Cluster

Technical card

Resolution: 5419x3631

Dates:May 15, 2018

Frames:Badaar Moon and SkyGlow Badaar: 7x300" (gain: 11.00) bin 1x1

Integration: 0.6 hours

Darks: ~10

Flats: ~20

Bias: ~50

Avg. Moon age: 0.00 days

Avg. Moon phase: 0.00%

Bortle Dark-Sky Scale: 7.00

Mean FWHM: 7.00

Temperature: 13.00 job: 2062955

RA center: 298.445 degrees

DEC center: 18.780 degrees

Pixel scale: 0.784 arcsec/pixel

Orientation: 206.943 degrees

Field radius: 0.710 degrees

Locations: Home Observatory, Newmarket, Ontario, Canada

Data source: Backyard


Messier 71 is a globular cluster in the constellation Sagitta. It was discovered by Philippe Loys de Chéseaux in 1745 and included by Charles Messier in his catalog of comet-like objects in 1780. It was also noted by Koehler at Dresden around 1775. The star cluster is at a distance of about 12,000 light years away from Earth and spans some 27 light years across and has a luminosity of approximately 13,200 suns. The irregular variable star Z Sagittae is a member of this cluster.



Jirair Afarian
License: None (All rights reserved)


  • M71 Angelfish Cluster, 


            Jirair Afarian
  • M71 Angelfish Cluster, 


            Jirair Afarian
  • Final
    M71 Angelfish Cluster, 


            Jirair Afarian

Sky plot

Sky plot


M71 Angelfish Cluster, 


            Jirair Afarian