This is now my longest exposure time on a single target, beating out my previous record of 19 hours on Orion from January. The months of June and July have been exceptionally cloudy for me, which I guess is karma for my 17 clear nights in the month of May. Although I shot this over 6 nights, many of them were cut short due to clouds, meaning I averaged ~4 hours per night. Captured on June 19, 20, 30, July 1, 10, and 16th, 2019 from a Bortle 7 zone.
I've also made a 16x9 crop is anyone want to use this as a wallpaper.
Equipment:
TPO 6" F/4 Imaging Newtonian
Orion Sirius EQ-G
ZWO ASI1600MM-Pro
Skywatcher Quattro Coma Corrector
ZWO EFW 8x1.25"/31mm
Astronomik 31mm LRGB+CLS Filters
Astrodon 31mm Ha 5nm + Oiii 3nm Filters
Agena 50mm Deluxe Straight-Through Guide Scope
ZWO ASI-120MC for guiding
Moonlite Autofocuser
Acquisition: 24 hours 10 minutes (Camera at Unity Gain, -15°C)
Ha- 136x300"
Oiii- 142x300”
Red- 20x60"
Green- 20x60"
Blue- 20x60"
Darks- 30 per exposure
Flats- 30 per filter per (almost every) night
Capture Software:
EQMod mount control. Captured using N.I.N.A. and PHD2 for guiding and dithering.
LinearFit to Green ChannelCombination BackgroundNeutralization ColorCalibration HSVRepair ArcsinhStretch HistogramTransformation Extract L > LRGBCombination for chrominance noise reduction
Narrowband Processing:
Deconvolution (With mask to only deconvolve the nebula. Used StarNet++ to create a star mask to add back in the original stars over the deconvolved ones. Star mask adjusted with binarize, convolution, and MorphologicalTransformation) TVG/MMT Noise reduction per channel (Jon Rista method) PixelMath to combine into color image (Pure HOO Combination) DynamicBackgroundExtraction ArcsinhStretch ACDNR HistogramTransformation Several CurveTransformations for lightness, hue, and saturation Extract L > LRGBCombination for chrominance noise reduction LocalHistogramEqualization CurvesTransformation for lightness, hue, and saturation StarMask > Convolution > MorphologicalTransformation to create star mask (took a LOT of tweaking) PixelMath to add in RGB stars: iif($T>.21, RGB, $T.5+RGB.5)
MultiscaleLinearTransform noise reduction (with same star mask applied)
CurvesTransformation for star saturation (with new ADVStarMask mask)
HDRMultiscaleTransform
CurvesTransformations for lightness and saturation
MorphologicalTransformaion to reduce star sizes
CloneStamp out a few highly red saturated stars (They looked unnaturally red)
Beautiful work. I remember when you shared when you were just 10 hours in and it already looked amazing. Incredible how much the additional patience and exposure time adds. Your perserverence paid off, the finished product is perfect.
azzkicker7283 on August 4th, 2019 at 00:00 UTC »
Links to my
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This is now my longest exposure time on a single target, beating out my previous record of 19 hours on Orion from January. The months of June and July have been exceptionally cloudy for me, which I guess is karma for my 17 clear nights in the month of May. Although I shot this over 6 nights, many of them were cut short due to clouds, meaning I averaged ~4 hours per night. Captured on June 19, 20, 30, July 1, 10, and 16th, 2019 from a Bortle 7 zone.
I've also made a 16x9 crop is anyone want to use this as a wallpaper.
Equipment:
TPO 6" F/4 Imaging Newtonian
Orion Sirius EQ-G
ZWO ASI1600MM-Pro
Skywatcher Quattro Coma Corrector
ZWO EFW 8x1.25"/31mm
Astronomik 31mm LRGB+CLS Filters
Astrodon 31mm Ha 5nm + Oiii 3nm Filters
Agena 50mm Deluxe Straight-Through Guide Scope
ZWO ASI-120MC for guiding
Moonlite Autofocuser
Acquisition: 24 hours 10 minutes (Camera at Unity Gain, -15°C)
Ha- 136x300"
Oiii- 142x300”
Red- 20x60"
Green- 20x60"
Blue- 20x60"
Darks- 30 per exposure
Flats- 30 per filter per (almost every) night
Capture Software:
EQMod mount control. Captured using N.I.N.A. and PHD2 for guiding and dithering.PixInsight Processing:
BatchPreProcessing
SubframeSelector
StarAlignment
Blink
ImageIntegration
DrizzleIntegration (2X, VarK 1.5)
DynamicCrop
DynamicBackgroundExtraction 2X
RGB Processing:
LinearFit to Green ChannelCombination BackgroundNeutralization ColorCalibration HSVRepair ArcsinhStretch HistogramTransformation Extract L > LRGBCombination for chrominance noise reductionNarrowband Processing:
Deconvolution (With mask to only deconvolve the nebula. Used StarNet++ to create a star mask to add back in the original stars over the deconvolved ones. Star mask adjusted with binarize, convolution, and MorphologicalTransformation) TVG/MMT Noise reduction per channel (Jon Rista method) PixelMath to combine into color image (Pure HOO Combination) DynamicBackgroundExtraction ArcsinhStretch ACDNR HistogramTransformation Several CurveTransformations for lightness, hue, and saturation Extract L > LRGBCombination for chrominance noise reduction LocalHistogramEqualization CurvesTransformation for lightness, hue, and saturation StarMask > Convolution > MorphologicalTransformation to create star mask (took a LOT of tweaking) PixelMath to add in RGB stars: iif($T>.21, RGB, $T.5+RGB.5)MultiscaleLinearTransform noise reduction (with same star mask applied)
CurvesTransformation for star saturation (with new ADVStarMask mask)
HDRMultiscaleTransform
CurvesTransformations for lightness and saturation
MorphologicalTransformaion to reduce star sizes
CloneStamp out a few highly red saturated stars (They looked unnaturally red)
Annotation
Resample to 85%
ajamesmccarthy on August 4th, 2019 at 00:04 UTC »
Beautiful work. I remember when you shared when you were just 10 hours in and it already looked amazing. Incredible how much the additional patience and exposure time adds. Your perserverence paid off, the finished product is perfect.
hylas1 on August 4th, 2019 at 01:16 UTC »
sorry that im clueless...how do you do 24 hours? doesn’t daylight ruin the exposure?