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Contains:  NGC 5195, Whirlpool galaxy, M 51, NGC 5194
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Technical card

Resolution: 2968x2260

Dates:April 4, 2019April 19, 2019April 24, 2019May 24, 2019May 26, 2019

Astrodon 5nm Ha 36mm: 24x900" (gain: 110.00) -10C bin 1x1
Astrodon B Gen2 E-Series 36mm: 24x600" -10C bin 1x1
Astrodon G Gen2 E-Series 36mm: 18x600" -10C bin 1x1
Astrodon L Gen2 E-Series 36mm: 45x600" -10C bin 1x1
Astrodon R Gen2 E-Series 36mm: 26x600" -10C bin 1x1

Integration: 24.8 hours

Avg. Moon age: 21.12 days

Avg. Moon phase: 59.12% job: 2730557

RA center: 202.471 degrees

DEC center: 47.196 degrees

Pixel scale: 0.545 arcsec/pixel

Orientation: 270.960 degrees

Field radius: 0.282 degrees

Locations: Abiqui Lake, Abiqui, New Mexico, United States; Los Alamos, Los Alamos, New Mexico, United States

Data source: Traveller


One of the all-time favorites, M51 and its interacting companion, NGC5195. The data for this LHaRGB image was accumulated over a dozen nights in April-May 2019 with my mobile setup, Stellarvue APO SVA130T@f7 and ASI183MM Pro camera on the Orion HDX-110 EQ-G mount.

The image is a combination of a narrowband (Ha) and LRGB data. The synthetic luminance was produced using luminance and HaRGB data. The LRGB data was captured with camera gain 0, while the narrowband Ha exposures were taken at gain 110.

L: 45x600s (Gain 0, bin 1x1)
Ha: 24x900s (Gain 110, bin 1x1)
R: 26x600s (Gain 0, bin 1x1)
G: 18x600s (Gain 0, bin 1x1)
B: 24x600s (Gain 0, bin 1x1)

Total exposure time: 24.8 hours



Sergey Trudolyubov



Closeup, horizontal


Closeup, vertical


Horizontal, increased color saturation


Vertical, increased color saturation

Sky plot

Sky plot


M51 LHaRGB, 


            Sergey Trudolyubov