SOCO IMAGE GALLERY


 

IC 4628   The Shrimp Nebula

IC 4628 is a large emission nebula in the constellation Scorpius. It's common name of the "Shrimp" Nebula (or, for our Australian friends, the "Prawn" Nebula) comes from the shape of the middle part of the nebula which, in less-deeply exposed images, has the curved shape somewhat resembling this creature. This object is around 1.5 degrees across and has a visual magnitude of 7.31. It has a physical size of 125 LY and lies at a distance of around 6000 LY. The scattering of stars in the lower right portion of my image is part of the large open cluster Trumpler 24. IC 4628 lies at the upper end of the asterism called the "False Comet", a collection of stars arcing down over 2 degrees to ζ Scorpii, including the bright cluster NGC 6231.
IC 4628 was discovered around the year 1900 by the American astronomer E. E. Barnard. This object also bears the identification Gum 56 after the Australiam astronomer C. S. Gum, who compiled a list of emission nebulas visible in the Southern Hemisphere in 1955.

Date(s) Acquired: 4 July 2016
Telescope: Orion 120mm EON Apochromatic Refractor
Camera: QSI Model 583 with Optec NextGEN Ultra Widefield 0.7X Telecompressor

 

   Exposure Time (min) 
   Number of Exposures
   RGB
   1
   Hα
   10
   Hβ
   -
   OIII
   -
   RGB
   15
   Hα
   6
   Hβ
   0
   OIII
   0

 

Processing:
Master red, green, blue, and Hα images created using Basic Processing Procedure I.
Hybrid Master red image created using Basic Processing Procedure II.
Color composite image created using Basic Processing Procedure III.
Color composite image contrast-stretched using Adobe Photoshop.




 

 

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