Celestial hemisphere:  Southern  ·  Constellation: Centaurus (Cen)  ·  Contains:  Centaurus A  ·  NGC 5128
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Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77), 



    
        

            Igor Chekalin
Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77), 



    
        

            Igor Chekalin

Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77)

Getting plate-solving status, please wait...
Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77), 



    
        

            Igor Chekalin
Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77), 



    
        

            Igor Chekalin

Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77)

Acquisition details

Basic astrometry details

Astrometry.net job: 6212436

RA center: 13h25m29s.5

DEC center: -43°0126

Pixel scale: 0.516 arcsec/pixel

Orientation: 180.268 degrees

Field radius: 0.496 degrees

Resolution: 5528x4176

File size: 14.4 MB

Locations: Brisbane, Toowong, QLD, Australia

Data source: Backyard

Description

Taken with TAL-250K (Klevtsov's system 10" reflector) during 22 nights between 11.04.2022 and 7.08.2022, on my balcony in Brisbane, Bortle 7 city sky.
I shot it in an hour interval between other main objects so only took about 1.5 hour per night.

Total exposure time 34h (H-alpha 8h, LRGB: 26h)

Sub-exposures:
L: 549x2min
R: 85x2min
G: 78x2min
B: 75x2min
Ha 25x20min
H-alpha minus Red version:
By subtracting the red channel from the hydrogen with the images correctly normalized in brightness, we can completely remove the stars, including their galactic background stars that is not resolved. (Some residual artifacts always left, but they are easily removed manually)

Comments

Revisions

  • Final
    Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77), 



    
        

            Igor Chekalin
    Original
  • Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77), 



    
        

            Igor Chekalin
    B

B

Title: H-alpha minus Red

Description: By subtracting the red channel from the hydrogen with the images correctly normalized in brightness, we can completely remove the stars, including their galactic background stars that is not resolved. Some residual artifacts always left, but they are easily removed manually.

Uploaded: ...

Sky plot

Sky plot

Histogram

Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77), 



    
        

            Igor Chekalin