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Rho Ophiuchi - IC 4603 and IC 4604

Started by Thundermoon1994 , Jul 09 2020 08:37 PM

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11 replies to this topic

#1 Thundermoon1994

Viking 1

topic starter

Posts: 922
Joined: 31 Mar 2016

Posted 09 July 2020 - 08:37 PM

Hi Everyone,

Here is my first attempt to image the Rho Ophiuchi region from 41*N where it only rises about 25* above the southern horizon. I've long wanted to image this but it would take several clear nights in order to get a reasonable integration with my old setup. Not so with the RASA! This is 1.8 hours (219 x 30-seconds) total integration time. The light gradient was really wicked due to the low altitude, and that took me a few tries to figure out how to handle it given that the field is full of nebulosity that I didn't want to kill, but I'm very happy with how it turned out. Using the GradientXTerminator plugin in Photoshop - with Detail set to "Coarse" and Aggressiveness set to "Low" - gave the best results. I had already done Photometric Color Calibration in Pixinsight, so I unchecked the "Balance background color" option.

Clear skies,

Damien

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#2 sunnyday

Voyager 1

Posts: 11,276
Joined: 23 Sep 2019

Posted 09 July 2020 - 08:48 PM

simply exquisite, the colors and the details. well done and thank you.

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#3 dan_hm

Apollo

Posts: 1,323
Joined: 31 Dec 2012

Posted 09 July 2020 - 10:22 PM

Beautiful work - and to do it so well all the way up from Ohio, bravo!

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#4 musicengin

Mercury-Atlas

Posts: 2,597
Joined: 05 Apr 2016

Posted 09 July 2020 - 10:24 PM

I especially like the crispness and contrast of the dark filaments and swirls: well done!

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#5 Thundermoon1994

Viking 1

topic starter

Posts: 922
Joined: 31 Mar 2016

Posted 10 July 2020 - 07:53 AM

simply exquisite, the colors and the details. well done and thank you.

Beautiful work - and to do it so well all the way up from Ohio, bravo!

I especially like the crispness and contrast of the dark filaments and swirls: well done!

Thanks guys! It got a Top Pick on Astrobin, so that's pretty cool.

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#6 RogeZ

Gemini

Posts: 3,011
Joined: 21 Nov 2004

Posted 10 July 2020 - 03:03 PM

I think you are losing a lot of precious detail and having to use aggresive and destructive noise reduction due to the short exposure time. While the RASA is fast I recommend you get at least 6 hrs per target specially with a color camera with small pixes.