The Southern Cross in HaRGB

This is a Ha RGB image with a Samyang 135 - a two panel mosaic

 

About 4 hours of integration in Ha and 7 hours in RGB with an triband filter from a Bortle 7.6 backyard- total integration of 11 hours and 55 minutes. 64% moon on average.

 

 

I started this project way back in 2023 when I first collected the Ha data, but only got around to capturing the colour data in June of 2025. To be completely honest, I got tired of waiting for an opportunity to do so from a darker site!

 

 

Stacked individual panels in Ha and RGB

 

Mosaic assembled in AstroPixelProcessor and RGB and Ha data registered and aligned also in APP

 

Processed in PixInsight-usual workflow -roughly as follows

 

Dynamic Crop (RGB and Ha ; re-registered in APP after crop)

BlurX correct

ADBE

astrometric solution for RGB

SPCC for RGB

Starnet++

GHS

NoiseX

Histogram transformation

 

 

Combined Ha with RGB using the PixinSight script

 

Minor adjustment in Photoshop CS6 to finish

 

 

Samyang 135mm/ ZWO ADI 533 MM/ZWO ASI 533 MC/Antlia 3nm H Alpha Filter/Antlia triband filter/ AM3/ASIAIRMINI

 

 

 

Done