Celestial hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  13 Gem)  ·  7 Gem)  ·  Calx (μ Gem  ·  Gem A  ·  IC 443  ·  IC 444  ·  Part of the constellation Gemini (Gem)  ·  Praepes (η Gem  ·  Tejat Posterior  ·  Tejat Prior  ·  The star 12 Gem  ·  The star Propus  ·  The star Tejat
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IC 443 and IC 444 (Revision: IC 443 and IC 444), Alan Brunelle
IC 443 and IC 444 (Revision: IC 443 and IC 444), Alan Brunelle

IC 443 and IC 444 (Revision: IC 443 and IC 444)

Getting plate-solving status, please wait...
IC 443 and IC 444 (Revision: IC 443 and IC 444), Alan Brunelle
IC 443 and IC 444 (Revision: IC 443 and IC 444), Alan Brunelle

IC 443 and IC 444 (Revision: IC 443 and IC 444)

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Description

Revision 1/4/2023:
As can be gleaned from the original Description, there were a lot of problems with the first image I posted and I even tossed a couple of attempts because I could get nothing satisfactory out of the limited data I had.  Here I attempt once again!  I did add a bit of extra data as in subs I had originally rejected in my sub selection process.  I decided having a bit more data contributing to data depth was more important than chucking a few not perfect subs.  And I put my trust in WBPP in rejecting them if it be so.  But they were not rejected.  In any case, I did a simple process using the new xXterminator functions in PI.  Many of the issues surrounded my early use of the new camera (at the time) and therefore distorted stars at corners because of tilt and backfocus should have been the sweet spot for correction by BlurXTerminator.  And the answer is mostly yes!  Only issue were the fact that some corner stars were so distorted, that BXT decided that they be two stars instead of one long star.  And so for those limited stars, I had a bunch of doubles.  The rest of the image is improved because I could tease, gently, more detail out of the emission and reflection nebulae.  I did not go overboard on this one using those capabilities of BXT.  And other than the improved star shapes, the star reductions are much better implemented.  And that is important because I did a more severe reduction to enhance some of the fainter details.  One thing I did not address was the two honkin' star halos for the two bright constellation stars.  I am at the point with this image that mostly better is good enough.  But at some point I will address these.

In any case, I do believe the image is much improved.  Noise is dealt with without introducing artifacts.  And there is none of the slight posterization effects found on the original.  And the colors after the stretch appear much more believable and less cartoon looking.  To me this adds to the sense of depth, something I felt the original image never had.

Old Description:
The hope was to get an image of this region of emission, reflection and dark nebulae just after receiving my new camera. It has been quite some time since I gathered this data. Reason being is that the data was such that I could never really get this processed to my satisfaction. I am still not satisfied and as you can tell by the huge halo blobs, that I have pretty much given up! At the time I was having my peak backfocus issues, spider webs inside my optical tube (Flaired star halos on even not that bright stars), etc, you name it. So for this processing, I decided that I would concentrate on getting some of the dark nebulae within 444 and also the reflection nebula, both strong (around 12 Gem) and faint in the upper left quadrant of the image, including the unmarked buried star just to the upper right of 12 Gem. After three failed efforts, I finally tried the method of splitting the luminance channel as I did for M 51. Much different result doing it this way and also much better than the other failed attempts. Sometimes bad data is just bad data. Very few round stars in the subs, and very few at the end. Please do not look too closely at this one! It is redeemable only if one keeps this one at arm's length!

Comments

Revisions

  • Final
    IC 443 and IC 444 (Revision: IC 443 and IC 444), Alan Brunelle
    Original
  • IC 443 and IC 444 (Revision: IC 443 and IC 444), Alan Brunelle
    C
  • IC 443 and IC 444 (Revision: IC 443 and IC 444), Alan Brunelle
    E

C

Title: Starless version of revision for MouseOver

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E

Title: Old version for reference.

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Sky plot

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Histogram

IC 443 and IC 444 (Revision: IC 443 and IC 444), Alan Brunelle