M71 / NGC 6838 by Dale Conrad

Dale Conrad | all galleries >> Dale Conrad's Astrophoto Gallery >> Gallery of Star Clusters > M71 / NGC 6838


2011/08/19	D.M.Conrad

M71 / NGC 6838

Sedro-Woolley, Wa.

This is a 100% crop and can be seen full scale by clickint on original.
This Messier Object is located in the constillation Saggita at about RA 19hr.54min. Dec +18deg. 47min.
M71 was discovered by Philippe Loys de Chéseaux in 1746. Charles Messier added the this cluster to his catalog in 1780.
Until the 1970's this cluster was catagorized as an open cluster but the general acceptance is now for a gloular cluster. Located about 12,000 light years from earth.
James Cuffey wrote an interesting paper exploring the possibility of M71 being a globular cluster in 1943.

Hutech Clear Filter 40D,Skywatcher 120ED @ F6.6 Borg reducer (7887)
12X5 minute exposures were stacked and preprocessed with Nebulosity.
Final processing was done with Cannon DPP.
A Baader Moon/SkyGlow filter was used with a Skywatcher 120ED scope and Borg 0.85 reducer flattener.
The mount was an older Mountain Instrument tangent arm equatorial mount guided with a Borg 77ACH guide scope with Orion Star Shoot autoguider. full exif

other sizes: small medium large original auto

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