Hemisphere:  Northern  ·  Constellation: Draco (Dra)  ·  Contains:  NGC 4236
Getting plate-solving status, please wait...
NGC 4236 Galaxy in Draco, 



    
        

            Elmiko
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NGC 4236 Galaxy in Draco

Getting plate-solving status, please wait...
NGC 4236 Galaxy in Draco, 



    
        

            Elmiko
Powered byPixInsight

NGC 4236 Galaxy in Draco

Equipment

Imaging Telescopes Or Lenses
Orion 8 Inch Newtonian Astrograph f/3.9
Imaging Cameras
ZWO ASI071MC PRO CMOS OSC
Mounts
Orion Azeq Atlas pro
Filters
Zwo Filter Drawer · Optolong UV-IR
Accessories
Baader MPCC Mark III Multi-Purpose Coma Corrector
Software
PixInsight · Stark Labs pHD guiding PHD2 · EQMOD, Stellarium, Stellarium Scope, PHD, Backyard EOS, Astro Tortilla Nebulosity 4
Guiding Telescopes Or Lenses
ASTRO TECH AT66ED Guiding
Guiding Cameras
Orion Starshoot Autoguider

Acquisition details

Dates:
March 16, 2021 ·  March 18, 2021
Frames:
Optolong L-eXtreme 2": 48x300" (4h) (gain: 90.00) -10C
Optolong UV-IR: 225x120" (7h 30') (gain: 90.00) -10C
Integration:
11h 30'
Darks:
30
Flats:
20
Bias:
50
Avg. Moon age:
3.71 days
Avg. Moon phase:
15.45%
Bortle Dark-Sky Scale:
8.00
Mean SQM:
18.48

RA center: 12h16m54s.22

DEC center: +69°2727.7

Pixel scale: 1.225 arcsec/pixel

Orientation: 41.576 degrees

Field radius: 0.587 degrees

More info:Open 

Resolution: 2133x2713

Locations: Home backyard red turning white zone Bortle 8, Gilbert, Az, United States

Data source: Backyard

Description

NGC is a beautiful Galaxy in Draco. It lies 12 million light years away.

I learned something new this project... When using a Reflector type Telescope, and imaging on both sides of the meridian, the diffraction spikes can be a bit miss-matched after registration of the files. I remember reading about this in the past. I guess it must be the first time I imaged on both sides of the meridian using this Telescope.

After opening my Integrated Stack , it was a bit disappointing thinking I was going to have to use half of the subs.

What I ended up doing is integrating only the half that were on the East side of the meridian. This was to be used for only the stars.. Because it had the nice four diffraction spike pattern.

Then I used all of the subs to bring out more of the galaxy signal. I ended up using Starnett to remove these funky looking stars ( with the miss- matched diffraction spikes). Brightened up the Galaxy on this starless image. Then added it to the image with the good stars using Pixel math.

Then continued to process normally. I really enjoyed figuring out a way to make it work without throwing out half of the subs!

Comments

Revisions

  • NGC 4236 Galaxy in Draco, 



    
        

            Elmiko
    Original
  • Final
    NGC 4236 Galaxy in Draco, 



    
        

            Elmiko
    F

F

Description: 4 hours of additional data using the L-extreme filter.

Uploaded: ...

Sky plot

Sky plot

Histogram

NGC 4236 Galaxy in Draco, 



    
        

            Elmiko