Sharpless 123


Dan Crowson
 

Sharpless 123 is a very faint emission nebula located approximately 12,400 light-years away in Cygnus. This is one of the few Sharpless objects that appear to be ‘invisible’ in the RGB.

 

Ha – 24x1800s – 720 minutes – binned 1x1

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

 

840 minutes total exposure – 14 hours

 

Imaged over five nights in September and October, 2019 at Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

HaRGB - https://www.flickr.com/photos/dcrowson/50704808561/sizes/l/

 

Dan

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

 


Brian Ottum
 

Yep, very faint.   I’d not pick it up at all with my rig.

 

From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of Dan Crowson
Sent: Thursday, December 10, 2020 11:12 PM
To: 'Dan Crowson' <dcrowson@...>
Subject: [DarkSkyNewMexico] Sharpless 123

 

Sharpless 123 is a very faint emission nebula located approximately 12,400 light-years away in Cygnus. This is one of the few Sharpless objects that appear to be ‘invisible’ in the RGB.

 

Ha – 24x1800s – 720 minutes – binned 1x1

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

 

840 minutes total exposure – 14 hours

 

Imaged over five nights in September and October, 2019 at Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

HaRGB - https://www.flickr.com/photos/dcrowson/50704808561/sizes/l/

 

Dan

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