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Contains:  NGC 3628, M 66, NGC 3627, M 65, NGC 3623
Getting plate-solving status, please wait...

Leo Triplet (and tidal tail) - LRGB

Technical card

Resolution: 2458x2458

Dates:Feb. 11, 2018

Astrodon Tru-Balance LRGB E-Series Gen 2 Blue: 24x600" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Green: 24x600" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Luminance: 27x1200" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Luminance: 30x600" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Red: 24x600" bin 1x1

Integration: 26.0 hours

Avg. Moon age: 25.57 days

Avg. Moon phase: 16.70% job: 1935832

RA center: 170.289 degrees

DEC center: 13.307 degrees

Pixel scale: 2.098 arcsec/pixel

Orientation: 90.943 degrees

Field radius: 1.013 degrees

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


The ‘Leo Triplet’ consists of Messier 65, Messier 66 and NGC 3628 – galaxies located around 30-35 million light years from Earth. Stretching out from NGC 3628 for around 300,000 light years is a ‘tidal tail’ – an elongated region of stars that arises as a result of gravitational interaction between galaxies.

This object was imaged from a remote rig located in Spain that is jointly owned and run with Barry Wilson. Data collection took place between 23 December 2017 and 11 February 2018. The tidal tail proved elusive even with 1200 second Luminance subs. It is clearly very faint and this leads to a decision about the extent to which it should be made apparent in the final image.

Lum: 27 x 1200s
Lum: 30 x 600s
Red: 24 x 600s
Green: 24 x 600s
Blue: 24 x 600s

A total of 26 hours exposure.

Capture: Steve Milne & Barry Wilson
Processing: Steve Milne



Steve Milne
License: None (All rights reserved)



Dialled back the tail a little.

Sky plot

Sky plot


Leo Triplet (and tidal tail) - LRGB, 


            Steve Milne