lefty7283

This is from stacking dozens of exposures and not rejecting out the trails. The satellite still moves for the few seconds between each exposure, creating the gaps

Essentially every stacking program have options to reject outlier pixels, such as the satellites. Hell even just averaging the pixels in an image stack without the outlier rejection would greatly diminish the streaks.

My cat climbed inside the empty clothes hamper as soon as laundry was done

I last shot this thing back in 2022, decided to give it another go from darker skies. Captured on April 19th, 2026 from a Bortle 3 zone (Deerlick Astronomy Village).

Places where I host my other images:

Flickr | Pixelfed

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: 8 hours 30 minutes (Camera at unity gain, -15°C)

L - 68x180"
R - 34x180"
G - 34x180"
B - 34x180"
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
Multiscale Gradient Correction with MARS Project data

Luminance linear:

BlurXterminator
StarXterminator to completely remove stars (extracted stars processed separately)
ArcsinhStretch + HistogramTransformation to stretch nonlinear

RGB Linear:

Channelcombination to make color image from RGB stacks
SpectrophotometricColorCalibration
BlurXTerminator
StarX to remove stars (to be used for star addition later)
HSV Repair
ArcsinhStretch + HistogramTransformation to stretch nonlinear
Slight curves saturation boost and histogram adjustments

Stars only image:

BlurXterminator for discortion correction and some mild star reduction
ArcsinhStretch + HistogramTransformation to stretch nonlinear (less aggressive stretch)
Slight curve adjustments

Nonlinear Processing

LRGBCombination to combine stretched RGB and L images
DeepSNR Noise reduction
Shitloads of curve transformations to adjust luminance, contrast, saturation, etc
More curves
NoiseXterminator for small scale chrominance noise reduction
LocalHistogramEqualization
Pixelmath to add in the stretched 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))
NoiseXTerminator for some small scale chrominance noise reduction
Resample to 80%
DynamicCrop in on just the galaxy
Annotation

KSP 2 released and flopped

Yep! Saturn, Mars, and Mercury, respectively

update they posted earthrise too

We finished out For All Mankind rewatch just in time for the new episode to come out!

For bad movie night last night we did Cats and Dogs (2001). Imo more it’s more silly than bad, but still about pets being secret spies at war with each other.

Kinda vibes at this point, but on my broadband images I'll loop through something like LLLLRRGGBB in my sequence. main thing is making sure there's good enough signal in the final luminance image. Seeing the SNR plots while live stacking is also very helpful for knowing when I hit diminishing returns for a particular filter

So I originally shot this back in 2020 from my in-law's house in a Bortle 4 area. Only got a handful of LRGB subs because my guide cam did not wanna talk to my laptop for most of the session back then. Recently I decided to shoot some Ha from my B9 apartment and give it a reprocess in HaLRGB. Overall I'm very pleased with this improvement after 6 years! Captured captured in February 2020 and December 2025 from bortle 4 and 9, respectively.

Places where I host my other images:

Flickr | Pixelfed

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: 9 hours 55 minutes (Camera at unity gain, -15°C)

Ha - 48x600"
L - 12x300"
R - 4x300"
G - 4x300"
B - 3x300"
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

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

Luminance linear:

BlurXterminator
StarXterminator to completely remove stars (extracted stars processed separately)
STF applied via HistogramTransformation to stretch nonlinear

Ha Processing:

StarX to remove stars
Subtracted red continuum to create a 'clean' Ha image using pixelmath
Pixelmath to combine the clean Ha image into the RGB image

largely following this advanced narrowband combination guide, also made by jimmy

RGB Linear:

Channelcombination to make color image from RGB stacks
SpectrophotometricColorCalibration
StarX to remove stars (to be used for star addition later)
PixelMath per the advanced narrowband guide to add Ha into the red and blue channels
ArcsinhStretch + HistogramTransformation to stretch nonlinear
Slight curves saturation boost and histogram adjustments

Stars only image:

BlurXterminator for discortion correction and some mild star reduction
HSV repair
ArcsinhStretch + HistogramTransformation to stretch nonlinear (less aggressive stretch)
Slight curve adjustments

Nonlinear Processing

LRGBCombination to combine stretched RGB and L images
DeepSNR Noise reduction
Shitloads of curve transformations to adjust luminance, contrast, saturation, etc
More curves
LocalHistogramTransformation
Pixelmath to add in the stretched 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))
NoiseXTerminator for some small scale chrominance noise reduction
Resample to 70%
DynamicCrop in on just the galaxy (not a whole lot going on in the background)
Annotation

Finally going through my processing backlog! I tried to get some Ha on this from home, but I had too many obstructions to shoot at this declination. Decided to keep this as a wider crop since most the images of this I see are cropped in on just the nebula itself. Captured captured on November 23rd, 2025 from a Bortle 3 zone (deerlick astronomy village).

Places where I host my other images:

Flickr | Pixelfed

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: 10 hours 12 minutes (Camera at unity gain, -15°C)

L - 97x180"
R - 37x180"
G - 36x180"
B - 34x180"
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

The luminance data was split into 3 stacks and combined to use the single channel DeepSNR method

DrizzleIntegration (2x, Var β=1.5)
Dynamic Crop

Luminance linear:

MultiscaleGradientCorrection using MARS Project data
BlurXterminator
StarXterminator to completely remove stars (extracted stars processed separately)
STF applied via HistogramTransformation to stretch nonlinear

RGB Linear:

Channelcombination to make color image from RGB stacks
MultiscaleGradientCorrection
SpectrophotometricColorCalibration
BlurX (correct only mode)
StarX to remove stars (to be used for star addition later)
StarX to extract a stars only image
ArcsinhStretch + HistogramTransformation to stretch nonlinear
Slight curves saturation boost and histogram adjustments

Stars only image:

HSV repair
ArcsinhStretch + HistogramTransformation to stretch nonlinear (less aggressive stretch)
Slight curve adjustments

Nonlinear Processing

LRGBCombination to combine stretched RGB and L images
DeepSNR Noise reduction
Shitloads of curve transformations to adjust luminance, contrast, saturation, etc
More curves
NoiseXTerminator for some small scale chrominance noise reduction
LocalHistogramTransformation
Even more curves
ColorSaturation adjustments (get rid of some background greens)
Pixelmath to add in the stretched 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))
Resample to 60%
Annotation

Started watching the last season of For All Mankind before season 5 comes out.

Also watched The Last Vampire on Earth for bad movie night last night. It’s best described as “if Tommy Wiseau tried to make Twilight”

What equipment did you use?

Not really an acute thing, but there’s this

https://en.wikipedia.org/wiki/Opioid-induced_hyperalgesia

Expansion ratio with a 30ft nozzle gotta be insane

We watched Hell Comes to Frogtown for bad movie night last night. It certainly was interesting.

After a worldwide nuclear war, where 68% of the male population was wiped out and virile men becoming a rarity, Sam Hell, a scavenger and a highly virile man, is assigned to help rescue a group of fertile women kidnapped by humanoid frogs.

What did you use to capture/process this?

Siril should be able to. I'll admit I've never used it myself (I use pixinsight for all my processing), but I know it's a fairly popular free processing option. Also you'll definitely want to try and take more dark frames than just one. Generally you'll stack the darks together, and then subtract that from your lights (this should remove most of the noise thats not the fixed hot pixels)