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Contains:  M 51, NGC 5194, NGC 5195, Whirlpool galaxy
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M51 - Whirlpool Galaxy, 


M51 - Whirlpool Galaxy
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M51 - Whirlpool Galaxy

Imaging telescopes or lenses: TPO 8" f/8 Ritchey-Chretien Astrograph

Imaging cameras: SBIG ST-2000XM

Mounts: CGE Pro

Software: PHD2 Guiding  ·  Optec FocusLock (for ONAG)  ·  PixInsight

Filters: Astronomik LRGB IIc Lum

Accessory: Optec TCF-S Focuser  ·  Innovations Foresight On-axis guider  ·  Starlight Xpress Lodestar X2

Dates:June 20, 2017June 27, 2017

Astronomik LRGB IIc Blue: 10x240" -15C bin 2x2
Astronomik LRGB IIc Green: 10x240" -15C bin 2x2
Astronomik LRGB IIc Lum: 25x300" -15C bin 1x1
Astronomik LRGB IIc Red: 10x240" -15C bin 2x2

Integration: 4.1 hours

Darks: ~13

Flats: ~50

Bias: ~200

Avg. Moon age: 14.59 days

Avg. Moon phase: 17.09%

Bortle Dark-Sky Scale: 6.00

Mean SQM: 18.88

Mean FWHM: 3.70

Basic astrometry details job: 1623253

RA center: 13h 29' 50"

DEC center: +47° 12' 50"

Pixel scale: 0.948 arcsec/pixel

Orientation: 89.133 degrees

Field radius: 0.259 degrees

Resolution: 1578x1176

Locations: Home Observatory - Vickburg, Vicksburg, Michigan, United States

Data source: Backyard


First time imaging without the moon in the way in a long time. I had the collimation all set a couple of sessions ago and now it seems to be off for this image. Tracking was excellent and yet I have elongation of stars a bit. Regardless, I am still happy with this and to be imaging again.



License: None (All rights reserved)

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M51 - Whirlpool Galaxy, 



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