Hemisphere:  Southern  ·  Constellation: Serpens (Ser)  ·  Contains:  Eagle Nebula  ·  IC 4703  ·  M 16  ·  NGC 6611  ·  Sh2-49  ·  Star Queen  ·  Star Queen nebula
Getting plate-solving status, please wait...
Messier 16 - First light for my C9.25, 



    
        

            Anthony Quintile
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Messier 16 - First light for my C9.25

Getting plate-solving status, please wait...
Messier 16 - First light for my C9.25, 



    
        

            Anthony Quintile
Powered byPixInsight

Messier 16 - First light for my C9.25

Imaging telescopes or lenses: Celestron C9.25 XLT

Imaging cameras: ZWO ASI2600MC Pro

Mounts: Losmandy G11 Gemini 2

Guiding telescopes or lenses: Celestron C9.25 XLT

Guiding cameras: ZWO ASI120MM Mini

Focal reducers: Starizona SCT Corrector II - 0.63X

Software: Phd2  ·  Pleaides Astrophoto PixInsight 1.8.8-6  ·  SharpCap 2.9  ·  Photoshop CC 2019  ·  DeepSkyStacker (DSS) deepskystacker

Filters: Astronomik UV-IR Blockfilter

Accessory: zwo EAF  ·  Celestron OAG #93648


Dates:June 13, 2021

Frames: 120x120" (4h)

Integration: 4h

Avg. Moon age: 2.81 days

Avg. Moon phase: 8.65%


RA center: 18h18m49s.460

DEC center: -13°4559.14

Pixel scale: 0.531 arcsec/pixel

Orientation: -24.803 degrees

Field radius: 0.330 degrees

More info:Open 


Resolution: 2603x3625

Locations: Home, Flagstaff, AZ, United States

Data source: Backyard

Description

This is first light for my C9.25. The skies here in Flagstaff have been extremely unstable with terrible seeing conditions.

I was only able to capture 4 hours of usable data over the only two reasonable nights this month, but I will be revisiting this object when I can get FWHM and guiding numbers much lower for a better result at this resolution. Ultimately I'd like to be able to have a crisp crop of the Pillars of Creation. This image feels pretty blurred to me from the seeing conditions, although it does hold up without too much zooming in.

I did have some luck using the Astronomik 2" L3 UV-IR Block filter to help minimize the blue coma tails in the corners and some chromatic aberration inherent in using an SCT with a FR/CC. Star color was better managed, and the blue tails are far less prominent. I had taken some test images with and without, and those images definitely showed a difference.

Comments

Revisions

  • Messier 16 - First light for my C9.25, 



    
        

            Anthony Quintile
    Original
  • Messier 16 - First light for my C9.25, 



    
        

            Anthony Quintile
    B
  • Messier 16 - First light for my C9.25, 



    
        

            Anthony Quintile
    C
  • Final
    Messier 16 - First light for my C9.25, 



    
        

            Anthony Quintile
    D

B

Description: Some targeted color noise reduction

Uploaded: ...

C

Description: I restacked best 50 subs, (rather than 120), since the sky conditions were so terrible as an experiment to compare quantity to quality. In this case quality trumped quantity, but the "quality" was poor even for the best. Proof of concept, but I will need to revisit M16 someday with better skies, as already planned.

Uploaded: ...

D

Description: Crop of the best 50 data...

Uploaded: ...

Sky plot

Sky plot

Histogram

Messier 16 - First light for my C9.25, 



    
        

            Anthony Quintile