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Melotte 15 in IC 1805


Kbramley

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This is the result of my recent imaging attempt, 14 hours of data gathered over about 3 weeks, kit as per signature. There are a few halos around some stars as a result of trying to control them blooming, a few more passes on the processing and I should be able to improve :)

8x1800s Ha

9x1800s OIII

11x1800s SII

Mel 15 is about 7500 light years away in the direction of Cassiopeia and is an active star forming region.

big version here http://www.astrobin.com/full/125155/B/

post-17161-0-45222500-1412348333_thumb.p

Enjoy

Keith

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Thanks for the comments everyone :)

Thanks for the tip Per, I will have a play with selective colour and see if I can tweak the magenta a touch, the upper most bright star is the biggest pain as that has a horrible halo from the OIII filter.

Cheers

Keith

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Hi Keith,

Congratulations, very impressive, nice Colors and deep Image. Did you use 'Tone Mapping' (removing stars) for the Image processing?

My actual Project since 28.9. is also Melotte15, but only 2 nights were clear enough. So I only got the Ha-Channel and wait for OIII and SII.

Here my Ha-Version until now:

Ha 26 x 900sec + Bias, Darks und Flats

http://www.astrovis.at/cluster_melotte15.php

or 100%

http://www.astrovis.at/images/cluster_melotte15Hal.jpg

Regards

Horst

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Hi Horst,

Thats a great start with the Ha, lots of contrast and detail, the TEC 140 is a mighty scope.

The SII and OIII channels are quite faint (as always), plus I didn't image mine during optimium conditions which didn't help but clear nights are are few and far between :)

To keep the stars under control I used a star mask, its the first time I have tried it so needs more work to prevent halos forming around the stars but it seems to worked reasonably well, I have seen tone mapping used a lot but never tried it myself yet, i will take another look and see how it works with this image.

Keith

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Cheers Horst, certainly helps bring out the SII and OIII data when the stars are eliminated.

Uranium - I tried a few colour ideas and settled on the nice brown colour for the dust and a light Cyan colour for the brighter background part with a darker blue for the more fainter background. I have noticed though it does look different on my mobile and laptop. I am toying with doing a less saturated version too with a bit more faint wispy stuff to try and give it a more natural look.

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Keith, I absolutely love this image, brilliant, well done! The colours are fantastic, so rich and intense. The dusty detail is wonderful. There is something quite religious about this image, in a ceiling of the Sistine Chapel kind of religious Renaissance art style way. I think that's the Stairway To Heaven isn't it!?!

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