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



    
        

            Steve Milne
Messier 51 (Whirlpool Galaxy) in Canes Venatici
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Messier 51 (Whirlpool Galaxy) in Canes Venatici

Technical card

Imaging telescopes or lenses: TEC-140

Imaging cameras: QSI 690 WSG-8

Mounts: Mesu 200  ·  10 Micron GM2000 HPS II UP

Guiding telescopes or lenses: TEC-140

Guiding cameras: Starlight Xpress Lodestar X2

Focal reducers: TEC Field Flattener

Software: Sequence Generator Pro  ·  Adobe Photoshop 6 CS  ·  Open PHD PHD 2.5  ·  Pixinsight 1.8

Filters: Ha 3nm  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Blue  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Green  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Red  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Luminance


Dates:May 11, 2018March 28, 2020

Frames:
Astrodon Tru-Balance LRGB E-Series Gen 2 Blue: 48x300" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Green: 48x300" bin 1x1
Ha 3nm: 35x1200" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Luminance: 75x600" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Red: 48x300" bin 1x1

Integration: 36.2 hours

Avg. Moon age: 14.51 days

Avg. Moon phase: 16.60%


Basic astrometry details

Astrometry.net job: 4187580

RA center: 13h 29' 52"

DEC center: +47° 10' 58"

Pixel scale: 0.521 arcsec/pixel

Orientation: 269.497 degrees

Field radius: 0.328 degrees


Resolution: 3543x2816

Locations: E-EyE, Fregenal de la Sierra, Extremadura, Spain

Data source: Own remote observatory

Remote source: e-EyE Extremadura

Description

The Whirlpool Galaxy (Messier 51) is located some 27 million light years distant in the constellation of Canes Venatici. It was discovered by Charles Messier on 13 October 1773. In the New General Catalogue, M51 is designated NGC 5194 and its companion NGC 5195.

Messier 51 was photographed between 22 February and 28 March 2020 from a rig in Spain that is privately owned and operated by Barry Wilson and me. In May 2018. I imaged M51 from my home observatory in the UK using the identical telescope, camera and filters. As such, it seemed to make sense to reuse the Lum and Ha from the May 2018 run.

Capture details are as follows:

Telescope: TEC 140
Camera: QSI 690
Filters: Astrodon
Mount: 10 Micron GM2000HPS (2020); Mesu 200 (2018)

Ha: 21 x 1200s (2020)
Ha: 14 x 1200s (2018)
Lum: 48 x 600s (2020)
Lum: 27 x 600s (2018)
Red: 48 x 300s
Green 48 x 300s
Blue: 48 x 300s

A total of 36 hours and 10 minutes exposure.

Data: Steve Milne & Barry Wilson

Comments

Revisions

    Messier 51 (Whirlpool Galaxy) in Canes Venatici, 



    
        

            Steve Milne
    Original
    Messier 51 (Whirlpool Galaxy) in Canes Venatici, 



    
        

            Steve Milne
    B
  • Final
    Messier 51 (Whirlpool Galaxy) in Canes Venatici, 



    
        

            Steve Milne
    C

C

Description: In looking at this image, I came to realise that it was probably too 'crucnchy' and that some of the 'detail' I thought I'd captured may well have been artefact introduced early (unfortunately) in the processing - maybe as a result of excessive deconvolution. So I reworked it from scratch. In the revision, I have not used any of the 2018 data. It's cropped a bit tighter too.

Uploaded: ...

Sky plot

Sky plot

Histogram

Messier 51 (Whirlpool Galaxy) in Canes Venatici, 



    
        

            Steve Milne