Hemisphere:  Northern  ·  Constellation: Vulpecula (Vul)  ·  Contains:  14 Vul  ·  Dumbbell nebula  ·  M 27  ·  NGC 6853  ·  PK060-03.1  ·  The star 14Vul
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Messier 27 and surroundings (OSC), 



    
        

            Linda
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Messier 27 and surroundings (OSC)

Getting plate-solving status, please wait...
Messier 27 and surroundings (OSC), 



    
        

            Linda
Powered byPixInsight

Messier 27 and surroundings (OSC)

Acquisition details

Dates:
Aug. 29, 2018
Frames:
80×60(1h 20′) (gain: 250.00) 0°C bin 1×1
Integration:
1h 20′
Darks:
70
Flats:
100
Bias:
500
Avg. Moon age:
17.56 days
Avg. Moon phase:
91.41%

RA center: 19h59m41s.96

DEC center: +22°4051.6

Pixel scale: 1.959 arcsec/pixel

Orientation: 89.372 degrees

Field radius: 0.645 degrees

More info:Open 

Resolution: 2067x1161

File size: 4.0 MB

Locations: Home, Broadlands, VA, United States

Data source: Backyard

Description

I've been having trouble making the transition from unguided DSLR photography to guided low focal length refractor imaging for the last few months. Part of it was a couple of mount issues and part of it was me, but I think I've worked through most of the issues, at least well enough to get some decent data.

The is a medium crop of a wider field around M27. The plan was to let the system image all night while I slept but, of course, 90 minutes or so later, the clouds started scooting through the sky despite the forecast for clear skies. I ended up getting 80 subs of 60 seconds each.

I found the processing on this challenging, so much so that I want to go back and revisit it. Dealing with all those stars and all that dust in that region of the Milky Way was a bit beyond my meager skills. Even so, I'm happy to have finally got something usable and I'm looking forward to upping my processing game.

Many of the stars have a pinkish cast to them. I don't think I created that in processing. I'm assuming it's caused by dust causing a reddish shift in the color of the stars shining through the dust. If anyone can say for sure, please let me know.

This was also my first attempt with a ZWO ASI294MC Pro and I think I'm really going to like the camera. I can easily see the difference in the noise compared to an uncooled DSLR though it does give up a bit on field of view.

[I did get back to this and it's posted as revision B. I'm happier with this one but the stars still seem a bit overwhelming. Still a lot to learn about image processing...]

Comments

Revisions

  • Messier 27 and surroundings (OSC), 



    
        

            Linda
    Original
  • Messier 27 and surroundings (OSC), 



    
        

            Linda
    B
  • Final
    Messier 27 and surroundings (OSC), 



    
        

            Linda
    C

B

Description: This is a reprocessing of the earlier image. It proves that I shouldn't try to process an image on only three hours sleep (as I did the first image) and that doing this takes some deliberation and thought. I'm a lot happier with this version though it was still a challenge keeping those thousands of stars from getting out of control. Constructive criticism is welcome!

Uploaded: ...

C

Description: This revision attempts to tame the stars.

Uploaded: ...

Sky plot

Sky plot

Histogram

Messier 27 and surroundings (OSC), 



    
        

            Linda