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





    
        

            Phil Montgomery
M51 Whirlpool Galaxy

M51 Whirlpool Galaxy

Technical card

Imaging telescope or lens:Takahashi TOA-150B

Imaging camera:ZWO ASI1600MM-Cool

Mount:G-11

Guiding telescope or lens:Takahashi TOA-150B

Guiding camera:ASI178MM

Focal reducer:Takahashi 67-FL flattener

Software:All Sky Plate SolverPixInsight version 1.8Lightroom

Filter:ZWO EFW 36mm

Accessory:Astrodon MMOAG

Resolution: 5605x3901

Dates:April 8, 2017April 14, 2017

Frames:
ZWO EFW 36mm Blu: 18x120" (gain: 139.00) -20C bin 1x1
ZWO EFW 36mm Blu: 21x300" (gain: 139.00) -20C bin 1x1
ZWO EFW 36mm Grn: 18x120" (gain: 139.00) -20C bin 1x1
ZWO EFW 36mm Grn: 21x300" (gain: 139.00) -20C bin 1x1
ZWO EFW 36mm Lum: 18x120" (gain: 139.00) -20C bin 1x1
ZWO EFW 36mm Lum: 21x300" (gain: 139.00) -20C bin 1x1
ZWO EFW 36mm Red: 18x120" (gain: 139.00) -20C bin 1x1
ZWO EFW 36mm Red: 21x300" (gain: 139.00) -20C bin 1x1

Integration: 9.4 hours

Darks: ~15

Flats: ~20

Bias: ~100

Avg. Moon age: 14.94 days

Avg. Moon phase: 91.45%

Bortle Dark-Sky Scale: 4.00

Temperature: 7.00

Astrometry.net job: 1539777

RA center: 202.461 degrees

DEC center: 47.203 degrees

Pixel scale: 0.358 arcsec/pixel

Orientation: -107.603 degrees

Field radius: 0.339 degrees

Data source: Backyard

Description

First light for my ASI1600mm-cool, under almost full moon from the suburbs. Version 1, RGB only.
Version 2: LRGB with 120s and 300s exposures. The 300s exposures had much higher SNRWeight than the 120s even though the 300s histograms were much more the the right then accustomed.

Comments

Author

pmont1
Phil Montgomery
License: None (All rights reserved)
1750
Like

Revisions

  • M51 Whirlpool Galaxy, 





    
        

            Phil Montgomery
    Original
  • Final
    M51 Whirlpool Galaxy, 





    
        

            Phil Montgomery
    B

B

M51 Added L and additional data: 120s and 300s

Sky plot

Sky plot

Histogram

M51 Whirlpool Galaxy, 





    
        

            Phil Montgomery