Hemisphere:  Northern  ·  Constellation: Triangulum (Tri)  ·  Contains:  IC 142  ·  IC 143  ·  NGC 595  ·  NGC 604
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Great Spiral Arm of M33: Close up, 



    
        

            Rodd Dryfoos
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Great Spiral Arm of M33: Close up

Getting plate-solving status, please wait...
Great Spiral Arm of M33: Close up, 



    
        

            Rodd Dryfoos
Powered byPixInsight

Great Spiral Arm of M33: Close up

Equipment

Imaging Telescopes Or Lenses
Takahashi TOA 130 NFB TOA 130
Imaging Cameras
ZWO ASI 1600mm cool pro ASI 1600
Mounts
Astro Physics AP Mach 1 GTO with GTOCP3
Filters
Ha · Blue · Green · Red · Astrodon LRGB Tru-Balance E-Series Lum
Accessories
Starlight Xpress Lodestar X2 · Baader/Astro-Physics Vario Guider · Takahashi TOA-35RD 0.7x
Software
Pixinsight

Acquisition details

Frames:
Astrodon LRGB Tru-Balance E-Series Lum: 241x120" (8h 2') (gain: 139.00) -18C bin 1x1
Blue: 116x120" (3h 52') (gain: 139.00) -18C bin 1x1
Green: 121x120" (4h 2') (gain: 139.00) -18C bin 1x1
Ha: 157x300" (13h 5') (gain: 139.00) -18C bin 1x1
Red: 125x120" (4h 10') (gain: 139.00) -18C bin 1x1
Integration:
33h 11'
Bortle Dark-Sky Scale:
6.00

RA center: 01h34m04s.66

DEC center: +30°4601.1

Pixel scale: 1.123 arcsec/pixel

Orientation: 177.279 degrees

Field radius: 0.178 degrees

More info:Open 

Resolution: 942x644

Data source: Backyard

Description

I wanted to highlight the structures in the most prominent of M33's spiral arms. I used a bit of creative license on this one and did bump up saturation just a bit to bring out the faint Ha regions throughout the arm. The image is a bit rough still as it is an aggressive crop, but I find I get lost in the depth if I look at it for a time and hop from feature to feature. This is a preview of a planned session with the C11Edge, which should provide a smoother, deeper and more satisfying image.

Comments

Revisions

  • Great Spiral Arm of M33: Close up, 



    
        

            Rodd Dryfoos
    Original
  • Great Spiral Arm of M33: Close up, 



    
        

            Rodd Dryfoos
    B
  • Great Spiral Arm of M33: Close up, 



    
        

            Rodd Dryfoos
    C
  • Great Spiral Arm of M33: Close up, 



    
        

            Rodd Dryfoos
    D
  • Great Spiral Arm of M33: Close up, 



    
        

            Rodd Dryfoos
    E
  • Final
    Great Spiral Arm of M33: Close up, 



    
        

            Rodd Dryfoos
    F

B

Description: The whole spiral arm, upsampled

Uploaded: ...

C

Description: Not upsampled

Uploaded: ...

D

Description: Crop3up2

Uploaded: ...

E

Description: Straight crop--no saturation enhancements

Uploaded: ...

F

Description: A touch of saturation

Uploaded: ...

Sky plot

Sky plot

Histogram

Great Spiral Arm of M33: Close up, 



    
        

            Rodd Dryfoos