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Joined 1 year ago
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Cake day: July 13th, 2023

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  • I’m guessing it’s called that because it’s kinda headphone shaped. It was discovered in the 30’s so I’m assuming only the brightest parts of the nebula were visible to the astronomers.

    This image is a combination of false color narrowband images for the nebula itself, plus true color RGB stars (the nebula is mostly red and a little blue in true color). If you zoom in to the center you can see the very blue white dwarf that caused the planetary nebula to form. Also for those curious this is what a single 10 minute long Ha exposure looks like (image total is 83.5 hours exposure). Captured over 33 nights from Jan-May 2024 from a bortle 9 zone.

    Places where I host my other images:

    Flickr | Instagram


    Equipment:

    • TPO 6" F/4 Imaging Newtonian

    • Orion Sirius EQ-G

    • ZWO ASI1600MM-Pro

    • Skywatcher Quattro Coma Corrector

    • ZWO EFW 8x1.25"/31mm

    • Astronomik LRGB+CLS Filters- 31mm

    • Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm

    • Agena 50mm Deluxe Straight-Through Guide Scope

    • ZWO ASI-290mc for guiding

    • Moonlite Autofocuser

    Acquisition: 83 hours 30 minutes (Camera at -15°C), NB exposures at unity gain and BB at half unity

    • Ha - 238x600"

    • Oiii - 247x600"

    • R - 54x60"

    • G - 53x60"

    • B - 54x60"

    • Darks- 30

    • Flats- 30 per filter

    Capture Software:

    • Captured using N.I.N.A. and PHD2 for guiding and dithering.

    PixInsight Preprocessing:

    • BatchPreProcessing

    • StarAlignment

    • Blink

    • ImageIntegration per channel

    • DrizzleIntegration (2x, Var β=1.5)

    • Dynamic Crop

    • DynamicBackgroundExtraction 3x

    duplicated each image and removed stars via StarXterminator. Ran DBE with a shitload of points to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)

    $T * med(model) / model

    Narrowband Linear:

    • Blur and NoiseXTerminator

    • StarXterminator to completely remove stars (to be later replaced by the RGB ones)

    • ArcsinhStretch to slightly stretch nonlinear

    • iHDR 2.0 script (low preset) to stretch each channel the rest of the way.

    here’s the link to the repo if you want to add it to your own PI install.

    RGB Linear:

    • ChannelCombination to combine monochrome R G and B frame into color image

    • SpectroPhotometricColorCalibration

    • BlurXTerminator for star sharpening (correct only)

    • HSV Repair

    • StarXterminator to generate a stars-only image

    • ArcsinhStretch + HT to stretch nonlinear (to be combined with starless narrowband image later)

    • Invert > SCNR > invert to remove magentas

    • Curves to saturate the stars a bit more

    Nonlinear:

    • PixelMath to combine stretched Ha and Oiii images into color image (/u/dreamsplease’s palette)

    R = iif(Ha > .15, Ha, (Ha*.8)+(Oiii*.2))

    G = iif(Ha > 0.5, 1-(1-Oiii)*(1-(Ha-0.5)), Oiii *(Ha+0.5))

    B = iif(Oiii > .1, Oiii, (Ha*.3)+(Oiii*.2))

    • NoiseX again

    • Background Neutralization

    • Shitloads of Curve Transformations to adjust lightness, hues, contrast, saturation, etc

    • even more curves

    • Pixelmath to add in the stretched RGB stars only image from earlier

    This basically re-linearizes the two images, adds them together, and then stretches them back to before. More info on it here)

    mtf(.005,

    mtf(.995,Stars)+

    mtf(.995,Starless))

    • Couple final curves

    • Resample to 65%

    • DynamicCrop

    • Annotation






  • Sh2-64 is the red nebula to the right of the image. It frames up pretty well with the more golden stars seen in the milky way core. I probably should’ve gotten more exposure time to help bring out some of the dark nebula details, but it was only clear for one night at the dark site (at least the night went perfectly, which is rare for trips out to the middle of nowhere). Captured on June 7th, 2024 from a Bortle 3 zone (Deerlick Astronomy Village)

    Places where I host my other images:

    Flickr | Instagram


    Equipment:

    • TPO 6" F/4 Imaging Newtonian

    • Orion Sirius EQ-G

    • ZWO ASI1600MM-Pro

    • Skywatcher Quattro Coma Corrector

    • ZWO EFW 8x1.25"/31mm

    • Astronomik LRGB+CLS Filters- 31mm

    • Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm

    • Agena 50mm Deluxe Straight-Through Guide Scope

    • ZWO ASI-290mc for guiding

    • Moonlite Autofocuser

    Acquisition: 5 hours 44 minutes (Camera at half unity gain -15°C)

    • L - 76x120"

    • R - 32x120"

    • G - 32x120"

    • B - 32x120"

    • Darks- 30

    • Flats- 30 per filter

    Capture Software:

    • Captured using N.I.N.A. and PHD2 for guiding and dithering.

    PixInsight Preprocessing:

    • BatchPreProcessing

    • StarAlignment

    • Blink

    • ImageIntegration per channel per panel

    • DrizzleIntegration (2x, Var β=1.5)

    • Dynamic Crop

    • DynamicBackgroundExtraction

    Luminance Linear:

    • BlurXterminator (Correct only)

    • NoiseXterminator

    • HistogramTransformation + sketchpad’s iHDR script (low preset) to stretch to nonlinear

    RGB Linear:

    • ChannelCombination to combine monochrom R G and B stacks into color image

    • SpectrophotometricColorCalibration

    • BlurXterminator (correct only)

    • HSV repair

    • ArcsinhStretch + iHDR script (low preset) to stretch to nonlinear

    Nonlinear Processing:

    • LRGBCombination using stretched L as luminance

    • DeepSNR

    • Various curve adjustments for lightness, contrast, hue, saturation, etc (with varying lum/star masks)

    • Slight SCNR green

    • ColorSaturation to boost the saturation of the Ha region

    • More curves

    • NoiseXterminator

    • invert > SCNR > invert to remove some magentas

    • LocalHistogramEqualization

    two rounds at scale 16 and 132 to target different sized structures

    • LOTS more curve adjustments

    • MultiscaleLinearTransform for chrominance noise reduction

    • Even more curves

    • Resample to 60%

    • Annotation













  • Finally done with classes and I got some time to at least star processing my pics. Gonna be a while before I figure out all the HDR stuff, so here’s a pic of the prominences about 10 seconds before C3. It was absolutely nutty seeing them naked eye during the eclipse, and visually through my other telescope. Captured on April 8th, 2024 from Sikeston, MO.

    Places where I host my other images:

    Flickr | Instagram


    Equipment:

    • TPO 6" F/4 Imaging Newtonian

    • Orion Sirius EQ-G

    • Canon T3i (Ha modded)

    • Skywatcher Quattro Coma Corrector

    • Moonlite Autofocuser

    Acquisition:

    • Single 1/4000" exposure at ISO 100

    Capture Software:

    • Eclipse Orchestrator Free for automating the capture sequence

    • NINA for controlling the mount and autofocuser

    Photoshop processing:

    • Crop, and some minor adjustments to exposure, contrast, shadows, whites, and blacks, and slight S curve





  • lefty7283@lemmy.worldOPtopics@lemmy.world23% Waxing Crescent [OC]
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    2 months ago

    Thanks to my north facing balcony, I can only photograph the moon when it’s at high declinations. Fortunately it was at +27 dec the other day, and it was early enough for me to be awake to shoot it! Captured at 10pm on April 12th, 2024.

    Places where I host my other images:

    Flickr | Instagram


    Equipment:

    • TPO 6" F/4 Imaging Newtonian

    • Orion Sirius EQ-G

    • ZWO ASI1600MM-Pro

    • Skywatcher Quattro Coma Corrector

    • ZWO EFW 8x1.25"/31mm

    • Astronomik LRGB+CLS Filters- 31mm

    • Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm

    • Agena 50mm Deluxe Straight-Through Guide Scope

    • ZWO ASI-120MC for guiding

    • Moonlite Autofocuser

    Acquisition: (Camera at Unity Gain, -15°C)

    • R - 20000 x 5.4ms

    • G - 2000 x 4.3ms

    • B - 2000 x 6.0ms

    Capture Software:

    • Captured using Sharpcap and N.I.N.A. for mount/filterwheel control

    Stacking:

    • Stacked the best 25% of frames in Autostakkert (autosharpened, 3X Drizzle)

    PixInsight Processing:

    • DynamicCrop

    • ChannelCombination to combine monochrome images into RGB image

    • ChannelMatch to align G and B color channels to red

    • ColorCalibration

    • HistogramTransformation (slight stretch)

    • SCNR > invert > SCNR to remove green and magenta color fringing

    • CurvesTransformations to adjust lightness, contrast, colors, saturation, etc.

    • LocalHistogramTransformation

    • dynamic crop

    • Annotation