Topics

FW: M4


Dan Crowson
 

This one can be found in the Gallery section (page 26) of the June, 2017 Reflector. The magazine can be found here - https://www.astroleague.org/files/reflector/Reflector%20-%20June%202017_singe%20pgs.pdf.

 

Also note that fellow Dark Sky New Mexico imager Brian Ottum also has an image on the same page.


Dan

 

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

 

From: Dan Crowson [mailto:dcrowson@...]
Sent: Sunday, May 08, 2016 6:50 PM
To: 'Dan Crowson'
Subject: M4

 

M4 (NGC 6121) is a Shapley-Sawyer class IX (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 7,200 light-years away in Scorpius. It is easy to find in the sky because it is just over a degree away from the bright (magnitude ~1) star Antares (bottom right in the image).

 

NGC 6144 is the class XI globular at the top right.

 

Luminance – 12x600s – 120 minutes – binned 1x1

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

 

240 minutes total exposure – 4 hours

 

Imaged on April 4th and 8th, 2016 at the Danville Conservation Area (New Florence, Missouri) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/26627906420/sizes/l

 

Dan

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

 


Eric Africa <eja24601@...>
 

Congrats Dan and Brian!




From: DarkSkyNewMexico@... on behalf of 'Dan Crowson' dcrowson@... [DarkSkyNewMexico]
Sent: Monday, June 19, 2017 8:52 PM
To: 'Dan Crowson'
Subject: [DarkSkyNewMexico] FW: M4
 
 

This one can be found in the Gallery section (page 26) of the June, 2017 Reflector. The magazine can be found here - https://www.astroleague.org/files/reflector/Reflector%20-%20June%202017_singe%20pgs.pdf.

www.astroleague.org
THE ASTRONOMICAL LEAGUE 1 Published by the Astronomical League Vol. 69, No. 3 June 2017 Amateur Astronomy Online The Radio Sky Setting Astronomical Goals for 2017

 

Also note that fellow Dark Sky New Mexico imager Brian Ottum also has an image on the same page.


Dan

 

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

 

From: Dan Crowson [mailto:dcrowson@...]
Sent: Sunday, May 08, 2016 6:50 PM
To: 'Dan Crowson'
Subject: M4

 

M4 (NGC 6121) is a Shapley-Sawyer class IX (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 7,200 light-years away in Scorpius. It is easy to find in the sky because it is just over a degree away from the bright (magnitude ~1) star Antares (bottom right in the image).

 

NGC 6144 is the class XI globular at the top right.

 

Luminance – 12x600s – 120 minutes – binned 1x1

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

 

240 minutes total exposure – 4 hours

 

Imaged on April 4th and 8th, 2016 at the Danville Conservation Area (New Florence, Missouri) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/26627906420/sizes/l

 

Dan

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

 


Bernard Miller
 

Congratulations to both of you. Nice images, both.

 

Bernard

 

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Monday, June 19, 2017 5:52 PM
To: 'Dan Crowson'
Subject: [DarkSkyNewMexico] FW: M4

 

 

This one can be found in the Gallery section (page 26) of the June, 2017 Reflector. The magazine can be found here - https://www.astroleague.org/files/reflector/Reflector%20-%20June%202017_singe%20pgs.pdf.

 

Also note that fellow Dark Sky New Mexico imager Brian Ottum also has an image on the same page.


Dan

 

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

 

From: Dan Crowson [mailto:dcrowson@...]
Sent: Sunday, May 08, 2016 6:50 PM
To: 'Dan Crowson' <dcrowson@...>
Subject: M4

 

M4 (NGC 6121) is a Shapley-Sawyer class IX (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 7,200 light-years away in Scorpius. It is easy to find in the sky because it is just over a degree away from the bright (magnitude ~1) star Antares (bottom right in the image).

 

NGC 6144 is the class XI globular at the top right.

 

Luminance – 12x600s – 120 minutes – binned 1x1

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

 

240 minutes total exposure – 4 hours

 

Imaged on April 4th and 8th, 2016 at the Danville Conservation Area (New Florence, Missouri) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/26627906420/sizes/l

 

Dan

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

 


Mark Hanson
 

Nice image Dan

 

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Monday, June 19, 2017 7:52 PM
To: 'Dan Crowson'
Subject: [DarkSkyNewMexico] FW: M4

 

 

This one can be found in the Gallery section (page 26) of the June, 2017 Reflector. The magazine can be found here - https://www.astroleague.org/files/reflector/Reflector%20-%20June%202017_singe%20pgs.pdf.

 

Also note that fellow Dark Sky New Mexico imager Brian Ottum also has an image on the same page.


Dan

 

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

 

From: Dan Crowson [mailto:dcrowson@...]
Sent: Sunday, May 08, 2016 6:50 PM
To: 'Dan Crowson'
Subject: M4

 

M4 (NGC 6121) is a Shapley-Sawyer class IX (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 7,200 light-years away in Scorpius. It is easy to find in the sky because it is just over a degree away from the bright (magnitude ~1) star Antares (bottom right in the image).

 

NGC 6144 is the class XI globular at the top right.

 

Luminance – 12x600s – 120 minutes – binned 1x1

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

 

240 minutes total exposure – 4 hours

 

Imaged on April 4th and 8th, 2016 at the Danville Conservation Area (New Florence, Missouri) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/26627906420/sizes/l

 

Dan

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

 

 

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