Astral Imaging at Dogwood Ridge Observatory

Latitude: 3748'51.0" N"
Longitude:7823'41.0"W
Scottsville, Virginia 24590

 

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Sh2-187
Image Information

This is an H II region located on the outermost edge of the Orion Arm , visually appears surrounded by dark nebula LDN 1317. The distance was estimated through studies spectrophotometric in about 1440 parsecs (4700 light years ) from the observation of stars exciters gas this and other surrounding clouds, its position coincides with that of the source 2MASS 01230704 + J 6151527. The cloud belongs to a large molecular complex at the center of which is located a molecular jet at high speed, originated from a source of infrared radiation cataloged as S 187 IRS, located very close to another strong source, IRAS 01202 +6133. The visible part of the cloud is surrounded by an extended envelope of neutral hydrogen , detectable at wavelengths other than visible, whose mass total can be estimated at about 7600 M ☉ . Its age can be estimated instead around to 100-200000 years. 

The evidence of the presence of phenomena of star formation may be identified in numerous infrared sources discoveries in the nebula, like those just mentioned including the molecular jet; in particular, one of the most powerful sources is IRAS 01 202 +6133, inserted deep into a dense cocoon easily identifiable bright infrared (S 187 IRS),  whose counterpart in visible light is known as S187Hα: it would be a star Ae / Be Herbig .


Credit & Copyright: David A. Churchill

 

 

 

 

 

 

 

 

 

Sh2-187

Sh2-187

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Sh2-187 Gif Animation of the center crop showing the progression of processing to bring out the finer details.

Gif

This image consists of 74 luminance, 35 red, 29 green, and 25 blue 15 minute exposures for a total of 40-3/4 hours. The rgb images are binned 2x2 while the luminance images are binned 1x1. All taken at -15C. All data was acquired using MaxImDl/CCD version 5.24 using ACP7.1.  Pix Insight version 1.8.02.1098 was used for processing. Dithered guiding was on.

Equipment and Location Information

Date Sept. 26 - Oct. 28, 2014
Location Dogwood Ridge Observatory
Optics Optical Guidance Systems 12.5" RC @f/9
Mount Astro Physics AP1200GTO
Camera SBIG STL-11002M/CW8
Filters Baader LRGB Ha 7nm,SII 8nm, OIII 8.5nm - 50.8mm Unmounted Filters
Conditions Temperature low to mid 60s with moderate to good  seeing. Transparency good to moderate.

   
    
  Last Modified :10/02/12 01:10 PM