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Old 22-06-2021, 04:29 PM
Jimbo_Aus (Jim)
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Omega Centauri - NGC5139

Whilst waiting for Corona Australis to clear my roof I decided to image Omega Centauri in LRGB with 30 sec exposures. I used the new Normalized Scale Gradient script in Pixinsight, so far so good and it definitely is producing tighter stars and less gradients.

L x 90 x 30s
RGB x 60 x 30s each
ZWO183mm Pro, -15deg, Gain 53, x 75 Flats and Flat Darks
ZWO 290mm mini, OAG and 8 x 1.25" Filter Wheel
Astronomik CLS CCD 1.25" L and Deep Sky 1.25" RGB Filters
Skywatcher Esprit 100
Saxon AZ-EQ6GT mount and Berlebach Planet Tripod
PHD2 guiding, SGP Pro for acquisition, Sharpcap Pro for PA and Pixinsight for calibration and processing.
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Click for full-size image (NGC5139_LRGB_Final_IIS.jpg)
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  #2  
Old 22-06-2021, 06:50 PM
Zuts
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Lovely star colours
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Old 22-06-2021, 08:39 PM
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PKay (Peter)
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Looks great Jim, like to see a hi res version.

Spot on with the shorter exposures.

Will have a look at the script.

Good effort
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Old 23-06-2021, 02:51 AM
Jimbo_Aus (Jim)
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Looks great Jim, like to see a hi res version.

Spot on with the shorter exposures.

Will have a look at the script.

Good effort
Thanks Peter, here's a link to a higher resolution tiff image: https://drive.google.com/file/d/1AEy...ew?usp=sharing
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Old 23-06-2021, 02:52 AM
Jimbo_Aus (Jim)
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Lovely star colours
Thanks
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Old 23-06-2021, 02:10 PM
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Thanks Peter, here's a link to a higher resolution tiff image: https://drive.google.com/file/d/1AEy...ew?usp=sharing
Maate, there's hi res and something that my satellite said 'file too large' or something like that, your file is 200Mbyte!!
Anyway couldn't check it out, have another go
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Old 23-06-2021, 03:57 PM
Jimbo_Aus (Jim)
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Maate, there's hi res and something that my satellite said 'file too large' or something like that, your file is 200Mbyte!!
Anyway couldn't check it out, have another go
Lol, try this one it's only 6.8Mb: https://drive.google.com/file/d/1csg...ew?usp=sharing

The original link was for the uncompressed tiff file, which needs to be downloaded before being able to be opened.
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Old 23-06-2021, 07:28 PM
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Sunfish (Ray)
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Don’t think you missed any of those stars. And all a great colour.
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Old 24-06-2021, 04:10 AM
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That's better, had a look at the hires.
I would try a few things to bring out more star colours.
You should see lots of blue stars, and even a few red ones if you get it right.

Maybe less LUM to avoid pixel saturation?
Maybe up the hue saturation?
Stretch a little less?

Last edited by PKay; 24-06-2021 at 12:40 PM.
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Old 24-06-2021, 06:48 AM
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Nice one, I saw it on the XWO face book page as well.
Alex
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Old 28-06-2021, 08:37 AM
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Excellent work Jim.
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Old 01-07-2021, 11:41 AM
Jimbo_Aus (Jim)
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Nice one, I saw it on the XWO face book page as well.
Alex
Thanks Alex!
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Old 01-07-2021, 11:41 AM
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Excellent work Jim.
Thank you Pete!
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Old 01-07-2021, 11:41 AM
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Don’t think you missed any of those stars. And all a great colour.
Thanks Ray!
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