Re: M12

Bernard Miller
 

Well done Dan. The mark of a good globular is the core. Al lot of people oversaturate them. Yours is perfect.

 

Bernard

 

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Saturday, March 25, 2017 5:38 PM
To: 'Dan Crowson'
Subject: [DarkSkyNewMexico] M12

 

 

M12 (NGC 6218) is a Shapley-Sawyer class IX (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 15,700 light-years away in Ophiuchus.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 17:18:17x300s – 85:90:85 minutes each – binned 2x2

 

500 minutes total exposure – 8 hours 20 minutes

 

Imaged over five nights in March, 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/33609550126/sizes/l

 

Dan

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

 

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