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

Celestial hemisphere: Southern · Constellation: Centaurus (Cen) · Contains: Centaurus A · NGC 5128

Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77)

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)

Final
Original
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.

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Status	Basic success
Started	...
Astrometry.net job	6212436
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77)

Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77)

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Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77)

Radio Galaxy Centaurus A (NGC 5128 or Caldwell 77)

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