Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  IC 4277  ·  IC 4278  ·  M 51  ·  NGC 5194  ·  NGC 5195  ·  Whirlpool Galaxy
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M51 (HaLRGB), 



    
        

            Linda
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Getting plate-solving status, please wait...
M51 (HaLRGB), 



    
        

            Linda
Powered byPixInsight

Imaging telescopes or lenses: Planewave CDK14

Imaging cameras: Finger Lakes Instruments Proline 16803

Mounts: Astro-Physics 1600 with Absolute Encoders 1600GTO

Guiding telescopes or lenses: Planewave CDK14

Guiding cameras: ZWO ASI174MM

Software: Starkeeper Voyager  ·  Pleaides Astrophoto PixInsight 1.8 Ripley  ·  PHD2

Filters: Astrodon Ha  ·  Astrodon Gen 2 Series I Luminance  ·  Astrodon Gen 2 Series I Green  ·  Astrodon Gen 2 Series I Blue  ·  Astrodon Gen 2 Series I Red

Accessory: Innovations Foresight ONAG


Dates:June 24, 2021June 25, 2021June 26, 2021June 27, 2021June 29, 2021June 30, 2021July 1, 2021July 2, 2021July 3, 2021July 4, 2021July 5, 2021July 6, 2021July 7, 2021July 10, 2021July 11, 2021July 12, 2021

Frames:
Astrodon Gen 2 Series I Blue: 22x480" (2h 56') -20C bin 2x2
Astrodon Gen 2 Series I Green: 17x480" (2h 16') -20C bin 2x2
Astrodon Gen 2 Series I Luminance: 34x900" (8h 30') -20C bin 1x1
Astrodon Gen 2 Series I Red: 31x480" (4h 8') -20C bin 2x2
Astrodon Ha: 14x900" (3h 30') -20C bin 1x1

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

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

  • M51 (HaLRGB), 



    
        

            Linda
    Original
  • M51 (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

M51 (HaLRGB), 



    
        

            Linda