Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1805  ·  IC1805  ·  Sh2-190
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Heart and Melotte 15 in Topaz Studio, 


            Jonathan Young
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Heart and Melotte 15 in Topaz Studio

Imaging telescopes or lenses: TEC 140 APO ED

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: AZ-EQ6

Guiding telescopes or lenses: TEC 140 APO ED

Guiding cameras: QHY5L-II

Focal reducers: Astro-Physics QUAD TCC 0.72x

Software: Topaz Studio 2  ·  Topaz Labs Sharpen AI  ·  PHD Lab Phd 2.6.3  ·  Startools 1.6  ·  Topaz Labs Adjust AI  ·  Seqence Generator Pro

Filters: Astrodon 36mm SII 5nm  ·  Astrodon Ha 5nm 36 mm  ·  Astrodon Oiii 5nm 36mm

Accessory: Celestron OAG  ·  Starizona Microtouch Autofocuser  ·  Starlight Xpress Filter-wheel 7x36mm

Dates:Aug. 18, 2020

Frames: 172x450"

Integration: 21.5 hours

Avg. Moon age: 28.86 days

Avg. Moon phase: 0.50%

Astrometry.net job: 4427995

RA center: 2h 32' 22"

DEC center: +61° 28' 41"

Pixel scale: 1.111 arcsec/pixel

Orientation: 30.630 degrees

Field radius: 0.857 degrees

Resolution: 3245x4506

Data source: Backyard


The Heart Nebula in Cassiopeia at 7500 light years. An intense star forming region frames Melotte 15.
21.5 hrs for an HA-SHO artistic composition from August 18, 19 and 20th 2020.

First full run with a new processing workflow using Topaz Studio 2 with integrating Denoise, Sharp and Adjust and the masking features as plug-ins. I find it is still necessary to correct smaller star shapes after using the AI algorithms. So far I've found that Topaz has many tools give a slight boost to small, mid and large detail/contrast, while adjust drives additional color depth that is beyond what I can achieve in other software. A bonus of using Studio II integrated package is that masking and opacity options are available to balance the adjustments and can focus the AI algorithms on lighter details in the background.

Initial stacking in DSS (Average stacking, 22% culled for star trails, tracking issues). 21 hrs total.
Initial background, stretch, HDR, decon, sharp, color at Red = S50H50, Green = S50H50, Blue = O100 in Startools (Ha - SHO) & denoise.
Tweaks Topaz Studio (AI Clear, basic adjustment, precision detail)
Denoise AI with 50% weight & mask (lum ~33%) (low light)
Sharpening AI with 67% weight & mask (lum ~33%)
Adjust AI no mask (20% weight)
Dehaze at 10%
Mask and replace stars in Startools.