Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  NGC 5195, Whirlpool galaxy, M 51, NGC 5194
Getting plate-solving status, please wait...
M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
M 51 - The Whirlpool Galaxy

M 51 - The Whirlpool Galaxy

Technical card

Resolution: 1920x1440

Dates:April 17, 2018April 18, 2018April 19, 2018April 21, 2018

Frames:
Baader Planetarium B-CCD 1.25": 53x120" -20C bin 1x1
Baader Planetarium B-CCD 1.25": 44x60" -20C bin 1x1
Baader Planetarium G-CCD 1.25": 56x120" -20C bin 1x1
Baader Planetarium G-CCD 1.25": 43x60" -20C bin 1x1
Baader Planetarium R-CCD 1.25": 54x120" -20C bin 1x1
Baader Planetarium R-CCD 1.25": 57x60" -20C bin 1x1
Baader Planetarium UV-IR-CUT Filter - 1.25": 37x60" bin 1x1
Baader Planetarium UV-IR-CUT Filter - 1.25": 178x120" -20C bin 1x1

Integration: 14.4 hours

Darks: ~30

Flats: ~30

Bias: ~100

Avg. Moon age: 3.41 days

Avg. Moon phase: 14.65%

Bortle Dark-Sky Scale: 6.00

Astrometry.net job: 2022708

RA center: 202.464 degrees

DEC center: 47.240 degrees

Pixel scale: 0.952 arcsec/pixel

Orientation: 1.402 degrees

Field radius: 0.317 degrees

Locations: Home Backyard, Geleen, Limburg, Netherlands

Data source: Backyard

Comments

Author

Epox
Andrea Alessandrelli
License: None (All rights reserved)
2891
Like

Revisions

  • M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
    Original
  • M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
    D
  • M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
    F
  • M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
    H
  • M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
    J
  • M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
    L
  • M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
    N
  • M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
    P
  • M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
    R
  • Final
    M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli
    S

D

Colors calibrated with photometric color calibration

F

"softer" version. I am also trying to heal that donut artifact.

H

I guess this is a good compromise between details and colors. Also stars are more colorful and less denoised/blurred.

J

Slightly saturated

L

Restacked in PI with Linearfit, the background turns out to be a bit more manageable.

N

Reprocessed with drizzle

P

Background levels lowered a bit and applied a little denoise.

R

Cropped and resampled at 75%. I also tried the grey restoration as denoise, it seems to help a lot in a background with many cold pixels.

S

Reprocessed with linear denoise and (I guess) better saturation...

Sky plot

Sky plot

Histogram

M 51 - The Whirlpool Galaxy, 





    
        

            Andrea Alessandrelli