Orion 2-panel mosaic Pier4

Hi Dave,

What a great job you did with that as is apparent from the image prior to processing it you attached. Cannot see any join either, lol. There's a lot of stars in there!  I assume you used on the posted image on Astrobin some software to annotate the image, I have zero knowledge of these but assume they are limited to the major catalogues. One obvious target not listed is ldn1622 which I located from my sky atlas as being left of the star 56Ori. Good image of it as well. Hope all is well and look forward to more.

Cheers Ray

Thanks Ray.  I was surprised at the amount of detail captured.  I am considering the same mosaic using 60s (maybe 120x60s) captures to see if I can tame the stars and the centre of M42.  Or maybe try for a 2-panel mosaic and HDR with some much shorter exposures.  I am still trying to get a feel for the Pier 4 equipment.  With the modern CMOS sensor the fact that bias frames are not used has not been detrimental to the image.

I have been using the Green Noise Removal in Siril to remove the green caste (see attachment for a 'before' and 'after' comparison) - this is a temporary solution until I can get to grips with HSL Selective Colour in APP.  The main parts of APP used were Crop, Remove Light Pollution and Calibrate Star Colours plus using a pre-set DDP, contrast and saturation.

When a deep sky image is uploaded to Astrobin it is automatically plate solved.  I did nothing for the annotation to arrive.  I think the solving is performed via the Nova Astrometry web service.

The LDN 1622 came out well.  Here  is a better one of that region.

I have wondered how many stars are in that image?

Dave


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Hi Dave,

Thanks for all that useful information. I hope in time you will attempt a HDR image, quite a challenge though I imagine.

With regard to the dark nebula, it was so obvious on that image that I had to look up what it was, and actually found it labelled in my Pocket Sky Atlas. I did look at that splendid image you linked to, but on a bang for buck basis yours has that one well beaten.

Cheers,

Ray

Hi Dave I have shared your image on Instagram and credited you, I hope that was was ok ?

No probs Steve.