CG 4

60%  resolution (5.7MB)

DSLR wide-field image

Object data of CG4

Object type: Cometary globule
Size: 22' x 7'
Magnitude: -
Constellation: Pup
Distance: 1,300 Ly
Notes: CG 4 is a cometary globule in constellation Puppis. Cometary globules are typically characterized by dusty heads and elongated tails. These features cause cometary globules to have visual similarities to comets, but in reality they are very much different. Globules are frequently the birthplaces of stars, and many show very young stars in their heads.

CG4 is about 1,300 light years from Earth. Its head is some 1.5 light-years in diameter, and its tail is about 8 light-years long. The dusty cloud contains enough material to make several Sun-sized stars. CG 4 seems about to devour the edge-on spiral galaxy ESO 257-19. In reality, this galaxy is more than a hundred million light-years further away, far beyond CG4.

Exposure data

Date: 2014-02-24 until 2014-02-28
Location: Hacienda Los Andes / Chile (1100m)
Telescope: Astro-Physics 175mm f/8 Starfire EDF with f/8.3 CCD field flattener
Camera: FLI PL29050 with Astrodon filters
Binning: L 1x1 / RGB 1x1
Mount: Astro-Physics AP1200GTO
Exposure time: L 26x8min / R 6x8min / G 6x8min / B 6x8min
Exposure time total: 5h52min
Notes: Image acquisition by CEDIC team (Christoph Kaltseis, Bernhard Hubl, Wolfgang Leitner and Herbert Walter)

Image processing by Christoph Kaltseis