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Contains:  NGC 3193, NGC 3189, NGC 3190, NGC 3187, NGC 3185
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Galaxies in Leo, 


            Johannes Josefsen
Galaxies in Leo

Galaxies in Leo

Technical card

Resolution: 5225x3305

Dates:March 31, 2019

Frames: 150x240"

Integration: 10.0 hours

Avg. Moon age: 25.12 days

Avg. Moon phase: 20.45% job: 2624143

RA center: 154.508 degrees

DEC center: 21.859 degrees

Pixel scale: 0.950 arcsec/pixel

Orientation: 286.781 degrees

Field radius: 0.816 degrees

Locations: Home, Nordby, Denmark

Data source: Backyard


Hickson 44 is a group of interacting galaxies in the constellation Leo, also designated as Arp 316 in The Atlas of Peculiar Galaxies.

NGC 3190 is the nearly edge on spiral galaxy in the center of the image, with the very prominent dustlane. Lower to the left is NGC 3187 a barred spiral galaxy. Above we find the hazy eliptical galaxy NGC 3193.

NGC 3185 to the lower left is not a part of the Hickson 44 group, but is another lovely barred spiral galaxy.

The distance to Hickson 44 is approximately 80 million lightyears.

Total integration time is around 9 hours in a bit of a mixed bag of subs.
100 minutes of luminance.
153 minutes of Red.
150 minutes of Green.
141 minutes of Blue.

I made a synthetic luminance by stacking all lum, red, green and blue subs for a total luminance stack of roughly 9 hours, but it stands to reason that the contribution of the RGB only equates to a little under 3 hours of luminance.
I am experimenting with just shooting RGB and combining it as a synthetic luminance, it is probably faster to get real luminance in the end. But shooting this much RGB compared to what I normally do, made it a little easier to process I think.



Johannes Josefsen
License: None (All rights reserved)


  • Galaxies in Leo, 


            Johannes Josefsen
  • Final
    Galaxies in Leo, 


            Johannes Josefsen


Upped the color a little bit.

Sky plot

Sky plot


Galaxies in Leo, 


            Johannes Josefsen