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[B.R.O.] Dive Deep into Coma Cluster - 28 hr Exposure Time

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#1 ub0423

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Posted 16 April 2021 - 07:55 PM

I have replaced my imaging camera with QHY600m and OAGL. My auxiliary guide scope just can't tame the system flexes at 2000mm focal length. This is my first serious project with the new CMOS camera QHY600M with total 28 hours of exposure time between 4/9 and 4/16/2021.

With 2X2 binning on LRGB channels, the image scale is about 0.76"/pixel. The local seeing at my remote observatory B.R.O. ranged between 1-2 arc seconds over these nights, and the RMS guiding errors is about 0.8" with my old faithful AP 900GTO and PEC on. My imaging configuration is a bit oversampled. 3X3bining would be more ideal, but the option is not available with this camera. Overall I am quite pleased with this camera. The noise level is very low and the sub frames are very clean.

 

Exposure:

L: 600s X 24; 1200s X 31
R: 600s X 26
G: 600s X 27
B: 600s X 29

28 hours of total exposure time.

 

Imaging Scope: AG Optical 12.5 In iDK at F6.7

Mount: AP 900 GTO CP4

Location: Mariposa, CA

 

The images are processed in Pixinsight. Most post processes are focused on the galaxy with spiral structures. I tried to leave the elliptical galaxies alone. Deconvolution and other contrast enhancing tools seem to create unwanted artifacts around the diffused galaxies. I did "cheat" a little when I masked the spiral galaxies. I used range selection first, then binarized the mask, and then manually removed the masking for elliptical galaxies by using clone stamps, and finally ran a convolution to softened the edges of the mask. I couldn't think of a way to selectively mask spiral galaxy only.

 

Here is the link to the full image:

https://cdn.astrobin...1c3d31d5174.jpg

Attached Thumbnails

  • LRGB Coma Cluster Cropped v2.jpg
  • LRGB_Coma_Cluster_v2_Annotated s.jpg

Edited by ub0423, 17 April 2021 - 01:15 AM.

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#2 John Miele

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Posted 16 April 2021 - 08:04 PM

You definitely went to the deep end of the pool! This is really cool! So many galaxies...I love it!

 

cs...John


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#3 Max-OP

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Posted 16 April 2021 - 08:09 PM

This is a spectacular photo. How many galaxies are in this frame? I realize there is a lot of integration time and a lot of effort was put into producing this image. It looks like professional work. I can't believe this is being done with amateur telescopes and cameras. Very interesting and exciting to see. 



#4 adosaj

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Posted 16 April 2021 - 08:16 PM

Could I ask what B.R.O. stands for? Thanks!

 

Anil



#5 Stellar1

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Posted 16 April 2021 - 08:18 PM

B.R.O! this is an amazing image, 28hrs? there are more galaxies here than I have time to count, amazing!



#6 descott12

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Posted 16 April 2021 - 08:22 PM

Looks like the Hubble Deep Field images. Amazing work!



#7 ub0423

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Posted 16 April 2021 - 09:04 PM

Could I ask what B.R.O. stands for? Thanks!

Anil

Butterfly Ridge Observatory - my remote Observatory in Mariposa, CA :)

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#8 ub0423

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Posted 17 April 2021 - 01:16 AM

There are over 1000 galaxies in this region. I have attached an annotated image for reference. There are a lot more galaxies unmarked or uncategorized in the image.



#9 Mert

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Posted 17 April 2021 - 02:33 AM

Really out of another orbit, soo deep.
Amazing the amount of galaxies but evenmore the amount of detail in those spiral galaxies.
Beautiful impacting image,
thanks for sharing.

Edited by Mert, 17 April 2021 - 02:33 AM.


#10 AG Optical

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Posted 19 April 2021 - 02:36 PM

Looks great!



#11 calypsob

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Posted 19 April 2021 - 07:39 PM

Fantastic image! I tried this area earlier this year. Fascinating to see the immense amount of data you got.

#12 TelescopeBah

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Posted 19 April 2021 - 07:53 PM

Wow amazing! Awesome! Great job! Really like it!


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