Abell 30

About image 

Abell 30 (also known as PK 208+33.1) is a planetary nebula in Cancer constellation, with magnitude 15.6 and dimensions 2.1’x2.1’: it belongs to the restricted family of the “born again” nebulae.
Around 12500 years ago, the central star of this nebula, having depleted its hydrogen, began ejecting its outer layers creating the planetary nebula, with a spherical shell of reddish color with traces of OIII blue gas.
Then, around the year 1150 AC, the star “lit up” again, pouring into the space streams of matter rich in helium and carbon: the interaction between this “new” material with the “old “ one gave rise to the bright knots surrounding the central star and well visible in the image.
The reconstruction of this fascinating history was possible thanks to the data collected by both orbital telescopes (Hubble, Chandra, XMM-Newton) and terrestrial telescopes.
I used RGB data as base and then reinforced the channels with Ha and OIII. I pushed especially with OIII filter in order to give more visibility of the bright knots, but all in all I found this nebula very difficult both to shoot and to process.

Technical data
Optic         GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount       10Micron GM2000 HPSII
Camera        ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters        Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB and OIII 5nm  
Guiding system   ZWO OAG-L with guide camera ASI 174MM
Exposure details    R 10x300" bin3 -15C, gain 100

                                    G 10x300" bin3 -15C, gain 100
          B 10x300" bin3 -15C, gain 100

          Ha 24x600" bin3 -15C gain 100

          OIII 48x600" bin3 -15C, gain 100
Total integration  14h30'
Acquisition      Voyager, PHD2
Processing      Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L       21.19   
Location       Promiod (Aosta Valley, Italy), own remote observatory
Date           11/12/13/14  February 2023


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