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Contains:  M 101, NGC 5457
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M101: Pinwheel Galaxy, 





    
        

            Chris Sullivan
M101: Pinwheel Galaxy

M101: Pinwheel Galaxy

Technical card

Resolution: 5200x3500

Dates:Jan. 15, 2019Jan. 26, 2019Jan. 31, 2019Feb. 4, 2019Feb. 10, 2019Feb. 17, 2019March 5, 2019March 6, 2019March 7, 2019March 12, 2019March 13, 2019

Frames:
Blue: 208x150" (gain: 139.00)
Green: 108x150" (gain: 139.00)
ZWO H-alpha 7nm: 73x300" (gain: 139.00)
Baader IR-Cut Moon & Skyglow Neodymium: 271x150" (gain: 139.00)
ZWO Red: 114x150" (gain: 139.00)

Integration: 35.3 hours

Avg. Moon age: 15.63 days

Avg. Moon phase: 30.49%

Bortle Dark-Sky Scale: 7.50

Astrometry.net job: 2592495

RA center: 210.805 degrees

DEC center: 54.361 degrees

Pixel scale: 0.456 arcsec/pixel

Orientation: 90.018 degrees

Field radius: 0.397 degrees

Locations: Home Roof (Bortle 7-8 / Est. Sky Quality: 18.53), Springfield, PA, United States

Data source: Backyard

Description

I think I went a little too hard on the deconvolution. Oh well - I'm still learning!

Comments

Author

Chris-PA
Chris Sullivan
License: None (All rights reserved)
8385
Like

Revisions

  • M101: Pinwheel Galaxy, 





    
        

            Chris Sullivan
    Original
  • M101: Pinwheel Galaxy, 





    
        

            Chris Sullivan
    B
  • M101: Pinwheel Galaxy, 





    
        

            Chris Sullivan
    C
  • M101: Pinwheel Galaxy, 





    
        

            Chris Sullivan
    D
  • M101: Pinwheel Galaxy, 





    
        

            Chris Sullivan
    E
  • M101: Pinwheel Galaxy, 





    
        

            Chris Sullivan
    F
  • M101: Pinwheel Galaxy, 





    
        

            Chris Sullivan
    G
  • Final
    M101: Pinwheel Galaxy, 





    
        

            Chris Sullivan
    H

B

Crop

C

Fixed a gradient issue, made the hydrogen areas a little redder and brought out some of the fainter parts a little more based on Andreas Zirke's comment.

D

Crop of revision C.

E

Fixed an issue with a red artifact around my stars that Dan Wilson pointed out.

F

Crop of revision E.

G

Improved star color and minor levels adjustment.

H

Crop of G - last revision (promise!)

Sky plot

Sky plot

Histogram

M101: Pinwheel Galaxy, 





    
        

            Chris Sullivan