Hemisphere:  Northern  ·  Constellation: Leo (Leo)  ·  Contains:  Copeland's Septet  ·  NGC 3745  ·  NGC 3746  ·  NGC 3748  ·  NGC 3750  ·  NGC 3751  ·  NGC 3753  ·  NGC 3754
Getting plate-solving status, please wait...
Copeland's Septet, 



    
        

            KuriousGeorge
Powered byPixInsight

Copeland's Septet

Getting plate-solving status, please wait...
Copeland's Septet, 



    
        

            KuriousGeorge
Powered byPixInsight

Copeland's Septet

Acquisition details

Dates:
March 15, 2022 ·  March 16, 2022 ·  March 17, 2022 ·  March 18, 2022
Frames:
Astrodon 50 mm G: 24×300(2h) (gain: 100.00) -5°C bin 2×2
Astrodon 50mm B: 24×300(2h) (gain: 100.00) -5°C bin 2×2
Astrodon 50mm L: 180×60(3h) (gain: 100.00) -5°C bin 2×2
Astrodon 50mm R: 24×300(2h) (gain: 100.00) -5°C bin 2×2
Integration:
9h
Darks:
40
Flats:
80
Flat darks:
80
Bias:
20
Avg. Moon age:
13.45 days
Avg. Moon phase:
96.71%
Mean SQM:
21.30
Mean FWHM:
2.00

RA center: 11h37m52s.812

DEC center: +22°0215.28

Pixel scale: 0.391 arcsec/pixel

Orientation: 1.651 degrees

Field radius: 0.253 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 3982x2424

File size: 1.0 MB

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard

Description

With the Julian skies still a bit unsteady with variable clouds, I decided to swap the FLI PL16803 CCD with the ASI6200MM Pro CMOS. The latter allows me to move from 15 minute to 1 minute subs to help find "holes" to the universe.

Here I collected 290 1-minute L subs between 1.6" and 2.8". I then kept the best 180 (3 hours) with an average FWHM closer to 2". The 5-minute color subs were all under 3". Although I was hoping to get 6+ hours of sub 2" L for this distant object, I was pleasantly surprised with the deconvolved results. (-:

I used the NOIRLab image as a reference...

https://noirlab.edu/public/images/noirlab2103a/

"Copeland’s Septet is a group of interacting galaxies located in the constellation Leo.The group was named after British astronomer Ralph Copeland, who discovered it in April 1874. It lies at an approximate distance of 400 million light years from Earth."

Comments

Revisions

    Copeland's Septet, 



    
        

            KuriousGeorge
    Original
    Copeland's Septet, 



    
        

            KuriousGeorge
    C
    Copeland's Septet, 



    
        

            KuriousGeorge
    D
  • Final
    Copeland's Septet, 



    
        

            KuriousGeorge
    E

C

Description: Slightly less sharpening for a more "natural" look.

Uploaded: ...

D

Description: Refined processing with a bit stronger HDR and wavelet sharpening. Used NOIRLab image as a reference...

https://noirlab.edu/public/images/noirlab2103a/

Uploaded: ...

E

Description: And the final wide shot for the record. (-:

Uploaded: ...

Sky plot

Sky plot

Histogram

Copeland's Septet, 



    
        

            KuriousGeorge