M71


Dan Crowson
 

Messier 71 (NGC 6838) is a Shapley-Sawyer class X-XI (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 13,000 light-years away in Sagitta.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged September 11th, 12th and 14th, 2017 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/37248434885/sizes/l

 

See my wider, refractor image here - https://www.flickr.com/photos/dcrowson/20005435454/sizes/l.

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 


Bernard Miller
 

Nice job Dan.

 

Bernard

 

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, September 15, 2017 3:31 PM
To: 'Dan Crowson'
Subject: [DarkSkyNewMexico] M71

 

 

Messier 71 (NGC 6838) is a Shapley-Sawyer class X-XI (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 13,000 light-years away in Sagitta.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged September 11th, 12th and 14th, 2017 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/37248434885/sizes/l

 

See my wider, refractor image here - https://www.flickr.com/photos/dcrowson/20005435454/sizes/l.

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO             &nbs p; http://www.crowson.com