Contains:  NGC 3628, M 66, NGC 3627, M 65, NGC 3623
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Leo Triplet, 





    
        

            Marcus Wögerer
Leo Triplet

Leo Triplet

Technical card

Resolution: 2462x1980

Dates:March 21, 2018

Frames:Baader L 31mm (UV & IR cut): 63x300" ISO800

Integration: 5.2 hours

Darks: ~8

Flats: ~49

Bias: ~99

Avg. Moon age: 4.03 days

Avg. Moon phase: 17.28%

Bortle Dark-Sky Scale: 4.00

Mean SQM: -21.33

Temperature: -9.00

Astrometry.net job: 1987549

RA center: 170.036 degrees

DEC center: 13.273 degrees

Pixel scale: 1.560 arcsec/pixel

Orientation: 3.991 degrees

Field radius: 0.684 degrees

Locations: Hohe Wand (Parkplatz Wildgehege), Wr.Neustadt, Niederösterreich, Austria

Data source: Unknown

Description

First clear night since 150 days.....

I was so happy that I spent almost the whole night to capture.
So I could collect more than 5 hours lights.
Seeing was really good. transparency not so good. But seems not so critical when integration time is long enough.
Guiding showed about 0.7..0.9 arcsec RMS failure.
Gear worked perfect. Although some wind, no problems.

Comments

Author

Marcus1968
Marcus Wögerer
License: None (All rights reserved)
2681
Like

Revisions

  • Leo Triplet, 





    
        

            Marcus Wögerer
    Original
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    G
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  • Final
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    L

D

no noise reduction (starting point)

E

TGV noise reduction (Strong on color, low on Luminance)

F

unsharp mask to sharpen detail in galaxie for bright sections ( selected with range mask)

G

little convolution to reduce background noise (bright area masked to keep sharpness)

H

once a little bit convolution at background to reduce noise. bright areas masked with range mask.

I

final new processing with all the steps before, but in drizzle 3x3 with cropped version

J

new processed drizzle 3x3 from cropped raw data

K

more contrast resized to original resolution.

L

darker background, reduced resolution to 100% of Pixel size

Sky plot

Sky plot

Histogram

Leo Triplet, 





    
        

            Marcus Wögerer