Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  IC 4277  ·  IC 4278  ·  M 51  ·  NGC 5194  ·  NGC 5195  ·  Whirlpool Galaxy
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Messier 51 (HaLRGB), 



    
        

            Linda
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Getting plate-solving status, please wait...
Messier 51 (HaLRGB), 



    
        

            Linda
Powered byPixInsight

Acquisition details

Dates:
June 24, 2021 ·  June 25, 2021 ·  June 26, 2021 ·  June 27, 2021 ·  June 29, 2021 ·  June 30, 2021 ·  July 1, 2021 ·  July 2, 2021 ·  July 3, 2021 ·  July 4, 2021 ·  July 5, 2021 ·  July 6, 2021 ·  July 7, 2021 ·  July 10, 2021 ·  July 11, 2021 ·  July 12, 2021
Frames:
Astrodon Gen2 I-Series Tru-Balance Blue: 22×480(2h 56′) -20°C bin 2×2
Astrodon Gen2 I-Series Tru-Balance Green: 17×480(2h 16′) -20°C bin 2×2
Astrodon Gen2 I-Series Tru-Balance Lum: 34×900(8h 30′) -20°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Red: 31×480(4h 8′) -20°C bin 2×2
Astrodon H-alpha 5nm: 14×900(3h 30′) -20°C bin 1×1
Integration:
21h 20′
Darks:
40
Flats:
37
Bias:
40
Avg. Moon age:
17.56 days
Avg. Moon phase:
45.30%

RA center: 13h29m57s.791

DEC center: +47°1137.24

Pixel scale: 0.728 arcsec/pixel

Orientation: 91.280 degrees (flipped)

Field radius: 0.327 degrees

More info:Open 

Resolution: 2660x1836

File size: 313.0 KB

Data source: Own remote observatory

Remote source: Sierra Remote Observatories

Description

M51, the Whirlpool Galaxy -- one of the best places in the night sky to see gravity in action!

This was taken with the telescope at SRO where I'm an imaging team member.

Processing steps:

Lum
dynamic crop
MLT (noise reduction)
deconvolution
make two copies, lum_l and lum_h

lum_l
HT stretch to bring out detail in the body of the galaxies

lum_h
HT stretch to bring out the "haze" around the galaxies

lum_stretched
pixel math average lum_h and lum_l
HDRMultiscaleTransform
LHE
ha
dynamic crop
MLT (noise reduction)
deconvolution
HT stretch

red, green and blue
dynamic crop
MLT (noise reduction)

RGB
channel combination (red, green, blue)
HT stretch
LRGBCombination with lum_stretched
NBRGBCombination with ha
Curves (color)
Adam Block's star de-emphasis
AdvSharpening
TGVDenoise

Overall I was very happy with the result here!

Comments

Revisions

  • Messier 51 (HaLRGB), 



    
        

            Linda
    Original
  • Messier 51 (HaLRGB), 



    
        

            Linda
    C

C

Description: The inverted image shows that the arcs of stars extend well below M51 and its companion. The arc is so faint that it doesn't really show up against the black background but the inverted image makes it stand out a bit more.

Uploaded: ...

Sky plot

Sky plot

Histogram

Messier 51 (HaLRGB), 



    
        

            Linda