Antilhue - Chile

CG 4 +  PGC 21338
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Image Data

Designation CG 4 and PGC 21338  (ESO 257-19)
Object type Cometary globule
Coordinates 07h35min  -46°56'
Constellation Puppis  (Pup)
Description Cometary globules are isolated, relatively small clouds of gas and dust within the Milky Way.  This example is very, very dim and about 1300 light years distant. The 'head', which is some 1.5 light years in diameter, seems about to devour the edge-on spiral galaxy PGC 21338 (mag 14.4), which in reality is hundreds of millions of light years away, far beyond CG 4. 

There is also an earlier grayscale image with a 155mm refractor

Exposure LRGB 180:45:45:90 min @ -13°C, RGB binned 2x2
Camera SBIG ST-10XE selfguided + SBIG CFW-8 with Astronomik Type II RGB filterset
Optics RCOS 14.5" Ritchey-Chrétien with AP 0.67X reducer working at f/6.56
Mount Astro-Physics AP1200GTO
Software MaxIm DL/CCD, DeBloomer, Registar, Sigma Pre Beta 11, Adobe Photoshop CS
Location - Date - Time San Esteban (Chile) - 19/20Feb2004 - 03:00 UTC 
Conditions Transparency 7,  Seeing 7, Temperature +15°C