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Hemisphere:  Northern  ·  Contains:  M 106, NGC 4248, NGC 4258
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M106 Galaxy in HaLRGB from a White Zone, 


            Douglas J Struble
M106 Galaxy in HaLRGB from a White Zone
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M106 Galaxy in HaLRGB from a White Zone

Technical card

Imaging telescopes or lenses: Explore Scientific 152 mm Carbon Fiber

Imaging cameras: ZWO ASI1600MM-PRO

Mounts: Astro-Physics Mach 1 GTO

Guiding telescopes or lenses: Orion 80mm Short Tube

Guiding cameras: Starlight Xpress Lodestar x2

Software: PHD2  ·  Sequence Generator Pro  ·  PixInsight  ·  Photoshop CS5  ·  SkySafari Pro

Filters: Astrodon Ha 5nm  ·  Astrodon Lum Tru-Balance E-Series Gen 2  ·  Astrodon Green Tru-Balance E-Series Gen 2  ·  Astrodon Blue Tru-Balance E-Series Gen 2  ·  Astrodon Red Tru-Balance E-Series Gen 2

Accessory: QHYCCD PoleMaster  ·  Hotech 2" SCA Self-Centering Field Flattener  ·  ZWO 8x 1.25" Filter Wheel (EFW)  ·  MoonLite CFL 2.5" Large Format Focuser

Dates:April 1, 2020April 3, 2020April 15, 2020April 16, 2020April 22, 2020

Astrodon Blue Tru-Balance E-Series Gen 2: 408x60" (gain: 0.00) -20C bin 1x1
Astrodon Green Tru-Balance E-Series Gen 2: 340x60" (gain: 0.00) -20C bin 1x1
Astrodon Ha 5nm: 413x120" (gain: 200.00) -20C bin 1x1
Astrodon Lum Tru-Balance E-Series Gen 2: 1386x60" (gain: 0.00) -20C bin 1x1
Astrodon Red Tru-Balance E-Series Gen 2: 300x60" (gain: 0.00) -20C bin 1x1

Integration: 54.3 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 18.44 days

Avg. Moon phase: 40.54%

Bortle Dark-Sky Scale: 8.00

Basic astrometry details job: 3453406

RA center: 12h 18' 48"

DEC center: +47° 16' 19"

Pixel scale: 0.649 arcsec/pixel

Orientation: 272.160 degrees

Field radius: 0.309 degrees

Resolution: 2695x2114

Locations: Backyard White Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


As most of the narrowband possibilities come to a close for the galaxy season here, I am forced to get back into broadband capturing in my White Zone (Bortle Sky Scale of 8). Every year I bang my head up against a wall; mostly with the RGB data. RGB data in a White Zone is always blotchy on the fainter structure. Anyways, this is about as best I could come up with at 54.3 hours of integration time.

Messier 106 (M106) is a spiral galaxy located in the constellation Canes Venatici, the Hunting Dogs. It lies at a distance of 23.7 million light years from Earth and has an apparent magnitude of 9.1. It has the designation NGC 4258 in the New General Catalogue. It occupies an area of 18.6 by 7.2 arc minutes of apparent sky, corresponding to a spatial diameter of 135,000 light years. It is classified as a SABbc type galaxy, which means that it is an intermediate between a normal and barred spiral galaxy. It is home to at least 400 billion stars. It's also classified as a Seyfert II galaxy. It has a considerably larger extent in radio than in visible light and exhibits emission line spectra from the nucleus. M106 shows unusual emission lines and X-rays, indicating that a portion of the galaxy is falling into a central supermassive black hole.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


M106 Galaxy in HaLRGB from a White Zone, 


            Douglas J Struble