Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  B85  ·  M 20  ·  M20  ·  NGC 6514  ·  Sh2-30  ·  Trifid Nebula  ·  Trifid nebula
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Close up on M20 LRGBHa, 



    
        

            Dawn Lowry
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Close up on M20 LRGBHa

Imaging telescopes or lenses: Explore Scientific 127mm ED Carbon Fiber APO triplet

Imaging cameras: ZWO 183MM pro ASI 183 MM pro

Mounts: Losmandy FHD tripod  ·  Orion EQ-G Atlas

Guiding telescopes or lenses: Explore Scientific 127mm ED Carbon Fiber APO triplet

Guiding cameras: ASI290MM mini

Focal reducers: Explore Scientific 3" x0.7 Reducer/Flattener

Software: PHD  ·  QHY-CCD Polemaster Software Polemaster software  ·  Adobe Photoshop CC 2019 Photoshop CC 2019  ·  PixInsight 1.8.6 Ripley PixInsight

Filters: Astrodon True Balance L E-Series Gen2  ·  Astrodon True Balance B E-Series Gen2  ·  Astrodon True Balance G E-Series Gen2  ·  Astrodon True Balance R E-Series Gen2  ·  Astrodon 5nm H-Alpha filter

Accessory: QHY PoleMaster Polemaster  ·  DewBuster Dew Controller  ·  5 Inch Dew-Not heating strip


Dates:May 30, 2020

Frames:
Astrodon 5nm H-Alpha filter: 27x180"
Astrodon True Balance B E-Series Gen2: 30x180"
Astrodon True Balance G E-Series Gen2: 27x180"
Astrodon True Balance L E-Series Gen2: 82x180" (gain: 76.00) -20C bin 1x1
Astrodon True Balance R E-Series Gen2: 40x180"

Integration: 10.3 hours

Darks: ~40

Flats: ~40

Flat darks: ~40

Avg. Moon age: 7.77 days

Avg. Moon phase: 54.14%

Bortle Dark-Sky Scale: 6.00


Astrometry.net job: 4030371

RA center: 18h 2' 38"

DEC center: -22° 58' 39"

Pixel scale: 0.739 arcsec/pixel

Orientation: -1.597 degrees

Field radius: 0.406 degrees


Resolution: 2800x2800

Locations: Home Observatory (Backyard) Bortle 6 (South Indianapolis), Camby, IN, United States

Data source: Backyard

Description

I've always been fascinated with the colors in combination of one another,This particularNebula is just one of my favorites.The subtle details in the AHA really add to it.I was not able to bring out as much of the faint surrounding dustPartially due to decreased time and partially because of my location, But I do plan to add more time to this as the years go on.

~~~~Tekkie stuffs:
Telescope:Explore Scientific 127mm CF FCD-100 reduced to 667mm F5.25
Camera: ASI183mmpro
Filters: Astrodon E series
Mount: Atlas EQ6R
Guiding camera: 290 mini with OAG
L RGB Ha: 82:40:27:30:27 at 180s
Total integration time: 10.3 hours
Seeing/ environment: 2-3
Bortle Class: Class 6 Backyard~ Central Indiana
Dates of acquisition: august September 2020. 4 nights
processing Pixinsight:
processing: considerations. MULTIPLE nights with good alignment (2 degree error allowed in SGP) flat and dark calibration on but not effective required crop to 2800 pixels

Crop
DBE
RGB combine masters
RGB workflow~PCC; MLT for Noise reduction
Lum workflow~decon with autopsf 45 iterations 5 layers; MLT for noise reduction
LRGB combine: after stretch~ Arc sin with Bg at 10%;

TGDVN and a restretch to bring up the black point
Curves with various masks to improve masking for lightness and sat boost
XPTR with masking and the dark script ; MLT for sharpening.
Morph to reduce the stars just a bit and ICC to end.

Comments

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Sky plot

Histogram

Close up on M20 LRGBHa, 



    
        

            Dawn Lowry