Hemisphere:  Northern  ·  Constellation: Taurus (Tau)  ·  Contains:  Crab nebula  ·  M 1  ·  NGC 1952
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The Crab Nebula, 



    
        

            Dan Pelzel
The Crab Nebula
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The Crab Nebula

Getting plate-solving status, please wait...
The Crab Nebula, 



    
        

            Dan Pelzel
The Crab Nebula
Powered byPixInsight

The Crab Nebula

Technical card

Imaging telescopes or lenses: TPO RC8

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: Astro-Physics Mach1GTO

Guiding telescopes or lenses: TPO RC8

Guiding cameras: Starlight Xpress LodeStar

Focal reducers: Astro-Physics ccdt67

Software: PHD2 Guiding PHD 2.5  ·  Main Sequence Software Sequence Generator Pro Sequence Generator Pro  ·  Photoshop CC  ·  PixInsight version 1.8

Filters: Astrodon 3nm OIII  ·  Astrodon 5nm H-alpha

Accessory: MoonLite CS RC 2" w/ High Res Stepper Mini V2


Dates:Dec. 19, 2019Dec. 20, 2019

Frames:
Astrodon 3nm OIII: 19x300" (1h 35')
Astrodon 3nm OIII: 73x300" (6h 5') (gain: 139.00) -20C bin 1x1
Astrodon 5nm H-alpha: 3x1200" (1h) bin 1x1
Astrodon 5nm H-alpha: 12x300" (1h)

Integration: 9h 40'

Darks: ~25

Flats: ~25

Flat darks: ~25

Avg. Moon age: 23.00 days

Avg. Moon phase: 41.08%

Bortle Dark-Sky Scale: 8.00


Basic astrometry details

Astrometry.net job: 3167086

RA center: 5h 34' 32"

DEC center: +22° 0' 43"

Pixel scale: 1.090 arcsec/pixel

Orientation: 268.478 degrees

Field radius: 0.533 degrees


Resolution: 2800x2137

Data source: Backyard

Description

After about a year I am finally getting back into AP. I had computer issues, and I am still working out issues with capturing data with an old old old MacBook running windows.

But I built a PC for processing, which is nice it no longer takes a full day just to pre-process!

I started M1 before all the PC issues and restarted it on 12-19. I was able to add the old data after version A. I had a ton of hot pixels with my data and assumed my darks were just too old. But I found with new darks there was still a lot of hot pixels. I guess I need to dither more and further. I found linear fit clipping didn't remove them but winsorized sigma did. Weird. Anyways I had some focusing issues, the latest SGP does seem to work better but is still slow and I need to do a better job nailing down backlash issues.

It's been so long I really had to relearn how to do all of this!

I wish I had a cleaner better M1 to show for it, but this is an ok image I guess. I might add more to it but I also kind of want to use my SV80. We'll see.

*Pixel scale is actually 0.69"/px. Drizz and resize.

Comments

Revisions

  • The Crab Nebula, 



    
        

            Dan Pelzel
    Original
  • The Crab Nebula, 



    
        

            Dan Pelzel
    B
  • The Crab Nebula, 



    
        

            Dan Pelzel
    C
  • The Crab Nebula, 



    
        

            Dan Pelzel
    D
  • Final
    The Crab Nebula, 



    
        

            Dan Pelzel
    E

E

Description: Just upped the brightness and contrast a little.

Uploaded: ...

Sky plot

Sky plot

Histogram

The Crab Nebula, 



    
        

            Dan Pelzel

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