Hemisphere:  Northern  ·  Constellation: Leo (Leo)  ·  Contains:  IC 2745  ·  Leo Triplet  ·  M 65  ·  M 66  ·  NGC 3623  ·  NGC 3627  ·  NGC 3628
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Leo Triplet (RGB), 



    
        

            Linda
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Getting plate-solving status, please wait...
Leo Triplet (RGB), 



    
        

            Linda
Powered byPixInsight

Acquisition details

Dates:
April 16, 2020 ·  May 12, 2020 ·  May 18, 2020 ·  May 25, 2020 ·  June 7, 2020 ·  June 8, 2020 ·  June 12, 2020 ·  June 14, 2020
Frames:
Astrodon Gen2 I-Series Tru-Balance Blue: 93×60(1h 33′) (gain: 25.00) -15°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Green: 511×60(8h 31′) (gain: 25.00) -15°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Red: 72×60(1h 12′) (gain: 25.00) -15°C bin 1×1
Integration:
11h 16′
Darks:
50
Flats:
53
Flat darks:
50
Avg. Moon age:
18.87 days
Avg. Moon phase:
51.51%
Bortle Dark-Sky Scale:
7.00

RA center: 11h19m49s.17

DEC center: +13°1656.4

Pixel scale: 1.623 arcsec/pixel

Orientation: 179.942 degrees

Field radius: 0.714 degrees

More info:Open 

Resolution: 2214x2268

File size: 233.3 KB

Locations: Home, Broadlands, VA, United States

Data source: Backyard

Description

I started this project in April 2020 and was forced to end it in mid-June. The spring has been very cloudy and rainy and clear nights have been few. My goal was to get 8 hours per filter and in my naive belief that I had plenty of time, I concentrated on one filter at a time. Now, the Triplet is going behind a tree less than half an hour after true darkness and I'm not likely to get enough additional data to really make a difference. As a result I ended up with my goal of 8 hours only in green. But, in an effort to get in at least some of the remaining channels, I have only 70 and 90 minutes each of red and blue.

As a result, I wasn't sure whether I'd be able to cope with the noise appropriately but mure denoise is a marvelous tool! This is a very basic processing.

For each red, green and blue master:

Dynamic Crop

Mure Denoise

Dynamic Background Extraction

For the RGB:

Channel Combination

Photometric Color Calibration

Histogram Transformation

Curves Transformation (saturation)

And that's it. Mure Denoise left the backgrounds looking horrendous which limited the amount of stretching I could do and I didn't feel compelled or capable of doing anything more sophisiticated. Overall, I was pretty happy with the compromise result.

Comments

Revisions

  • Leo Triplet (RGB), 



    
        

            Linda
    Original
  • Leo Triplet (RGB), 



    
        

            Linda
    B
  • Leo Triplet (RGB), 



    
        

            Linda
    C
  • Final
    Leo Triplet (RGB), 



    
        

            Linda
    D

B

Description: Did a small amount of star shrinkage.

Uploaded: ...

C

Description: Brought the levels up on ngc 3628 a bit and ran sharpening.

Uploaded: ...

D

Description: ran scnr

Uploaded: ...

Sky plot

Sky plot

Histogram

Leo Triplet (RGB), 



    
        

            Linda