Hemisphere:  Southern  ·  Constellation: Puppis (Pup)
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CG4 God's Hand (Cometary Globule), 



    
        

            Igor Chekalin
CG4 God's Hand (Cometary Globule)
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CG4 God's Hand (Cometary Globule)

Getting plate-solving status, please wait...
CG4 God's Hand (Cometary Globule), 



    
        

            Igor Chekalin
CG4 God's Hand (Cometary Globule)
Powered byPixInsight

CG4 God's Hand (Cometary Globule)

Acquisition details

Basic astrometry details

Astrometry.net job: 5767875

RA center: 07h33m47s.10

DEC center: -46°5725

Pixel scale: 1.034 arcsec/pixel

Orientation: 357.584 degrees

Field radius: 0.511 degrees

Resolution: 2961x1971

File size: 4.6 MB

Locations: Brisbane, Toowong, QLD, Australia

Data source: Backyard

Description

CG4 is a star-forming region located in the Puppis constellation, about 1300 light-years from us. It is one of several objects referred to as "cometary globules", because its shape is similar to that of a comet.

Photographed during 23 nights from December 29, 2021 to May 6, 2022 from the balcony in Brisbane City (Australia) .
Bortle 7 sky ("red" light pollution zone).

ZWO ASI2600MM camera, on TAL-250K (10" Klevtsov-Cassegrain) with 0.7x reducer/flattner MkII (F/6). EQ6-R mount.

This is L(R+Ha)GB composition with total exposure time of 44 hours.
23 hours H-alpha
11 hours Light
10 hours R+G+B

Individual sub-exposures used: 3 min for RGB, 2 min for L, 10 and 20 min for H-alpha
(Short 2 and 3 minutes are enforced by heavy light pollution. For H-alpha I switched to 20-minute exposures when I installed an off-axis guider)

Comments

Revisions

  • Final
    CG4 God's Hand (Cometary Globule), 



    
        

            Igor Chekalin
    Original
  • CG4 God's Hand (Cometary Globule), 



    
        

            Igor Chekalin
    B

B

Title: Starless version

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CG4 God's Hand (Cometary Globule), 



    
        

            Igor Chekalin