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Contains:  IC 1805
Getting plate-solving status, please wait...
Melotte 15, 


            Jonathan Young
Melotte 15
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Melotte 15

Technical card

Dates:Sept. 30, 2017

Frames: 85x300" bin 0x0

Integration: 7.1 hours

Avg. Moon age: 9.53 days

Avg. Moon phase: 72.05%

Basic astrometry details job: 2052413

RA center: 2h 33' 54"

DEC center: +61° 27' 14"

Pixel scale: 1.111 arcsec/pixel

Orientation: 355.410 degrees

Field radius: 0.879 degrees

Resolution: 4556x3420

Locations: Backyard, Saline, Michigan, United States

Data source: Backyard


50x300 Ha
35x300 O3
ASI 1600 - gain 180, 40 offset, 40 USB speed.
Processed with DSS and Star tools
(total processing time 95 minutes on [email protected] ghz, [email protected], 512GB 960evo NVME drive). Taken backyard Saline MI (red to north and east, orange to W, yellow to south. Average 20.7 Brightness)

30 darks (checked for same bg level)
16 flats - 30s 20000ADU
16 dark flats
KSC for all 2.5sigma, 5 iterations, no b/g calibration, remove hot pixels. Bicubic alignment.

No dithering/drizzle

Startools: Synthetic Lum
Layer-blend Ha-b/g + O3 f/g 40% blend
Crop 24,24,48,24
Wipe - gradient 80% strength, 3 pixel dark filter
Dev - 96.5%; sky b/g 5%; dark filter 16
Mask-autostar detail size 12, 90% bright threshold, 3 strength. Invert-save.
Deconvolution- 2pixels radius
Sharp- large
Contrast- comp gamma-Y, dark filter 3pix
HDR- reveal all, str 1.2, size 512pix
Mask - set full
Denoise- DWOR 8. Smooth 75, scale 90,90,90,90,50, bright detail loss 12%, color detail 0%.
Save Lum

Ha and O3 (R+B) layers
Wipe- gradient 3 pixel 80% str
Dev- ha 95%, O3 97.5%, sky b/g 5%, 8 pixels
Denoise - DWOR 8, smooth 75, 90,90,90,90,50, scale 3, bright detail loss 33%, color detail loss 0.
Save Ha\O3

LRGB composite
L, R, B, calc missing-Y, cap green, blue weight 1.56
Wipe gradient 80%, 3 pix
Color- CEILab, red reduce 1.1, blue reduce 1.17, cap green.
Denoise- DWOR 8, smooth 75%, 90,90,90,90,50, bright detail loss 5%, color detail loss 20%, scale 3.
Reload mask - invert.
Magic- reduce 1 pix.
Save -> Final composite



Jonathan Young
License: None (All rights reserved)


  • Melotte 15, 


            Jonathan Young
  • Melotte 15, 


            Jonathan Young
  • Final
    Melotte 15, 


            Jonathan Young


Description: Reprocessed -average stack, cold pixel removal, no wipe. Less aggressive stretch.

Sky plot

Sky plot


Melotte 15, 


            Jonathan Young