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


            Trevor Jones
M51: Whirlpool Galaxy
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Technical card

Imaging telescopes or lenses: Sky-Watcher Esprit 150 ED Super APO

Imaging cameras: Starlight Xpress Trius PRO-694 Mono

Guiding cameras: Starlight Xpress Lodestar Autoguider X2

Focal reducers: Sky-Watcher Field Flattener Esprit 150

Software: Astro Photography Tool APT  ·  photoshop cc  ·  DeepSkyStacker (DSS) Deepskystacker 3.3.6

Accessory: Starlight Xpress filter-wheel 7x1,25"

Dates:April 2, 2020April 10, 2020

Astronomik Blue (1.25"): 15x300" -35C bin 1x1
Astronomik Green (1.25"): 12x300" bin 1x1
Astronomik Lum 1.25": 36x300" -35C bin 1x1
Astronomik Red (1.25"): 9x300" -35C bin 1x1

Integration: 6.0 hours

Darks: ~15

Flats: ~20

Avg. Moon age: 13.00 days

Avg. Moon phase: 76.60%

Bortle Dark-Sky Scale: 7.00

Basic astrometry details

Astrometry.net job: 3421096

RA center: 13h 29' 49"

DEC center: +47° 12' 7"

Pixel scale: 1.024 arcsec/pixel

Orientation: 66.186 degrees

Field radius: 0.308 degrees

Resolution: 1800x1200

Locations: My Backyard, St. Catharines, Ontario, Canada

Data source: Backyard


This was an exciting project for me!

I've never had enough reach to do M51 justice before. This image was created by collecting LRGB exposures (5-minutes each) over several cold nights in March, 2020.

The images were stacked in DeepSkyStacker and processed entirely in Adobe Photoshop 2020.

I've recorded a 30-minute image-processing tutorial of the techniques used for this image that will be live in my image processing guide by the end of this week. If you've already downloaded it, remember to update to the new version (for free) this weekend to find it!

About the Camera: Starlight Xpress SX-42
About the Telescope Mount: Sky-Watcher EQ8-R Pro

Clear skies!


Sky plot

Sky plot


M51: Whirlpool Galaxy, 


            Trevor Jones