Some nice colors in the sky If you’re north enough. Sadly I doubt this will be as strong as the aurora back in May, but maybe one day well get them down in Atlanta again

NGC 4490 is a galaxy colliding with the smaller NGC 4485 galaxy, and both are about 25 million light years away. This image was taken with a monochrome camera through filters for luminance (all visible light), red, green, blue, and Hydrogen-alpha (656nm), which were combined into a color image. The Hydrogen-alpha was combined with red (described below) to make the HaLRGB image. The pink Ha regions are star forming nebulae within the galaxies. This got cropped out of the final pic, but I ended getting some gorgeous diffraction spikes on this star near the edge of the full FOV

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: 27 hours 37 minutes (Camera at half Unity Gain, -15°C)

• Ha - 128x360"

• Lum - 464x60"

• Red - 152x60"

• Green - 150x60"

• Blue - 123x60"

• Flats- 30 per filter

• 24 JimmyFlats per broadband filter

Capture Software:

• Captured using N.I.N.A.

PixInsight Processing:

• BatchPreProcessing (with premade JimmyFlats)

• StarAlignment

• Blink

• ImageIntegration

• DrizzleIntegration (2x, Var β=1.5)

• DynamicCrop

• DynamicBackgroundExtraction

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

$T * med(model) / model

Luminance:

• BlurXTerminator

• ArcsinhStretch + histogramtransformation to bring nonlinear

RGB:

• ChannelCombinaiton to combine monochrome R, G, B stacks into color image

• SpectroPhotometricColorCalibration

• BlurXTerminator (correct only mode)

• HSV Repair

making clean Ha

loosely following this guide

This basically subtracts any broadband signal from the Ha pic, leaving only the Ha emission, which is then combined in with the red and a little bit of the blue channels

• PixelMath to isolate just Ha

Ha-Q * (Red-med (Red)), Q=0.75

• PixelMath to add Ha into RGB image

Red = $T+B*(Ha_Clean - med(Ha_Clean))

Green = $T

Blue = $T+B0.2(Ha_Clean - med(Ha_Clean))

B variable = 0.6 (this controls how strongly the Ha is added)

Nonlinear

• ArcsinhStretch + histogramtransformation to bring HaRGB image nonlinear

• MLT for large scale chrominance noise reduction

• shitloads of curve transformations to adjust lightness, contrast, saturation, etc (with various luminance and star masks)

• slight SCNR to remove some greens

• LRGBCombination with stretched Luminance

• DeepSNR

• more curves

• ColorSaturation to slightly desaturate the Ha regions (they were very pink compared to the rest of the galaxy

• slight noisexterminator

• LocalHistogramEqualization

• even more curves

• Resample to 75%

• DynamicCrop onto just the galaxy

• annotation

Iirc the original goal was ‘at least 10’ but maybe up to 100 flights for a booster. No way to really know without flying them a lot

NASA is still doing a seat exchange and launching Johnny Kim on the next Soyuz in March, but it looks like it’ll be just Russians on at least the next 2 Soyuz’s after that

It may not be as big or well known as the other well known cluster in Hercules (M13), but it sure looks nice. Captured over 4 nights in July/August 2024 from a Bortle 9 zone

Places where I host my other images:

Instagram | Flickr

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: 6 hours 55 minutes (Camera at half Unity Gain, -15°C)

• Lum - 209x60"

• Red - 78x60"

• Green - 62x60"

• Blue - 66x60"

• Flats- 30 per filter

• 24 JimmyFlats per filter

Capture Software:

• Captured using N.I.N.A.

PixInsight Processing:

• BatchPreProcessing (with premade JimmyFlats)

• StarAlignment

• Blink

• ImageIntegration

• DrizzleIntegration (2x, Var β=1.5)

• DynamicCrop

• 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:

• BlurXTerminator (correct only mode)

• ArcsinhStretch + histogramtransformation to bring nonlinear

RGB:

• ChannelCombinaiton to combine monochrome R, G, B stacks into color image

• BlurXTerminator (correct only mode)

• SpectroPhotometricColorCalibration

• HSV Repair

• ArcsinhStretch + histogramtransformation to bring nonlinear

• Curves to saturate it a little

• MLT for large scale chrominance noise reduction

Nonlinear:

• LRGBCombination with stretched L as luminance

• DeepSNR Noise reduction

• Several CurveTransformations to adjust lightness, contrast, colors, saturation, etc.

• Invert > SCNR > invert > SCNR to remove some greens and magentas

• More curves

• A little bit of noiseXterminator

• DynamicCrop in on the clustert

• Resample to 75%

• Annotation

A few years ago I shot just the core of NGC7822, and I’ve decided to reshoot it as a 2 panel mosaic to get some of the outer structures. The whole nebula is actually pretty big in the sky (over 3 degrees!), but I did not want to deal with processing another 8+ panel mosaic to fit the whole thing.

Captured over 23 nights from September through November, 2023 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-120mc for guiding

• Moonlite Autofocuser

Acquisition: 51 hours 30 minutes (Camera at -15°C)

• Left panel:

• Ha - 54x360"

• Oiii - 130x360"

• Sii - 101x360"

• Right Panel:

• Ha - 46x360"

• Oiii - 94x360"

• Sii - 90x360"

• Darks- 30

• Flats- 30 per filter

Capture Software:

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

PixInsight processing:

Preprocessing

• BatchPreProcessing

• StarAlignment

• Blink

• ImageIntegration per channel per panel

• DrizzleIntegration (2x, Var β=1.5) per panel per channel

• StarAlignment in mosaic mode to align the two panels, then GradientMergeMosaic to combine them

Linear:

• DynamicBackground Extraction

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

• BlurXTerminator

• NoiseXterminator

• STF applied via HistogramTransformation to bring nonlinear

Nonlinear:

• PixelMath to combine stretched narrowband masters into color image

SHO --> RGB (classic Hubble Palette)

• removed stars and processed stars-only image separately with invert>SCNR and curve adjustments, to be added to starless image later.

• HistogramTransformations to adjust channel intensities

• Invert > SCNR > Invert to remove magentas

• CurveTransformations for slight hue adjustments

• LRGBCombination using stretched Ha as luminance

• shitloads of CurveTransformations to adjust hue, lightness, saturation, etc. (some with lum masks)

• MLT chrominance noise reduction

• NoiseXTerminator

• LocalHistogramEqualization

Two round of this: one at kernel radius 16 for the finer ‘feathery’ details and one at 512+ for larger structures

• More curves

• Relinearized narrowband and stars images to add in the stars only image

“unstretched” both images with histogramtransformation midtones set to 0.9999

pixelmath to just add those two images together

histogramtransformation to un-relinearize them by setting midtones to 0.0001

• ColorSaturation

• Even more curves

• Extract L > LRGBCombination for some chrominance noise reduction

• Slight SCNR to remove some greens from the bright parts of the nebula

• DynamicCrop to remove a few artifacts around the edge where the panels overlap

• Resample to 60%

• annotation

Will do!

The Deer Lick Group (right) is a group of galaxies with NGC 7331 in the foreground, and the galaxies surrounding it. NGC 7331 is approximately 40 million light years away, with the other Deer Lick members ~300 million light years behind it. Stephan’s Quintet (left) is a grouping of 5 galaxies. It was also one of the first targets photographed by the JWST

Much like deerlick, one of them is in the foreground ~40 Mly away from us, and the other 4 are 210-340 Mly distant. These distant galaxies are interacting and will eventually merge together. Here is an annotated image showing more galaxies in the uncropped FOV. Captured on November 16th, 17th, and 18th, 2020 from a bortle 6 zone.

Places where I host my other images:

Flickr

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: 12 hours 38 minutes (Camera at Unity Gain, -15°C)

• Lum- 235x120"

• Red- 48x120"

• Green- 47x120

• Blue- 49x120"

• Darks- 30

• Flats- 30 per filter

Capture Software:

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

PixInsight Processing:

• BatchPreProcessing

• SubframeSelector

• StarAlignment

• Blink

• ImageIntegration

• DrizzleIntegration (Luminance only)

• DynamicCrop

• DynamicBackgroundExtraction

Luminance:

• EZ Decon and Denoise (Luminance only)

• ArcsinhStretch

• HistogramTransformation

RGB

• StarAlign RGB stacks to Drizzled Lum

• LinearFit to Green

• ChannelCombintion

• PhotometricColorCalibration

• HSV Repair

• ArcsinhStretch

• HistogramTransformation

• LRGBCombination with Lum

Nonlinear:

• Several CurveTransformations to adjust lightness, contrast, saturation, etc

• ACDNR

• LocalHistogramEqualization

• More Curves

• EZ Star Reduction

• Resample to 60%

• DynamicCrop

• Annotation

For those who don’t see the ghost

Really glad how close I managed to get this to true color using just hydrogen and sulfur filters. My one complaint with this image is the halo around Gamma Cass present in both filters. Somehow my previous photo of Alnitak using an identical imaging train didn’t have it this extreme. The glow around the bright star isn’t nebulosity, but an artifact from the microlenses in the ASI1600 camera. Captured on December 8th, 14th, 22nd, and 26th, 2020 from a bortle 6 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-120MC for guiding

• Moonlite Autofocuser

Acquisition: 18 hours 36 minutes (Camera at Unity Gain, -20°C)

• Ha- 94x360"

• Sii- 92x360

• Darks- 30

• Flats- 30 per filter

Capture Software:

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

PixInsight Processing:

• BatchPreProcessing

• StarAlignment

• Blink

• ImageIntegration

• ImageIntegration to make a superluminance channel (just chucked every frame into a stack)

• DrizzleIntegration per panel(2x, Var β=1.5)

Linear:

• DynamicCrop

• DynamicBackgroundExtraction

Ha and Sii Stacks

• ChannelCombination to combine channels

Red = Ha

Green = Sii

Blue = Sii

• PhotometricColorCalibration

• HSV Repair

• ArcsinhStretch

• HistogramTransformation

• LRGBCombination with nonlinear superlum

Superliminance

• EZ Denoise

• ArcsinhStretch

• HistogramTransformation

Nonlinear

• CurveTransformations to adjust lightness, contrast, and saturation

• ACDNR

• LocalHistogramEqualization

• HistogramTransformation to reduce black point

• More Curves

• EZ Star Reduction

• DynamicCrop (lotta empty space on my original framing)

• Resample to 70%

• Annotation

deleted by creator

Every dot in this image is a star.

Messier 7 is an open star cluster in the core of the Milky Way, so it’s an incredibly dense star field compared to most of my other astro photos. If you’re in dark enough skies it’s possible to see the cluster with the naked eye in the summer (it’s also great to view through binoculars). I wish I had gotten more time on this to bring out the dark nebula before some haze came in, but I’m still extremely pleased with these results for just 25 minutes of exposure time. Captured on June 25th, 2020 from a Bortle 4 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-120MC for guiding

• Moonlite Autofocuser

Acquisition: 24.5 minutes (Camera at Unity Gain, -15°C)

• Lum- 25x30"

• Red- 8x30""

• Green- 9x30"

• Blue- 7x30"

• Darks- 30

• Flats- 30 per filter

Capture Software:

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

PixInsight Processing:

• BatchPreProcessing

• StarAlignment

• Blink

• ImageIntegration

• DynamicCrop

• AutomaticBackgroundExtraction 2X

• Luminance:

• TGV/MMT Noise Reduction

• ArcsinhStretch

• HistogramTransformation

• RGB:

• LinearFit to green

• ChannelCombination

• AutomaticBackgroundExtraction

• PhotometricColorCalibration

• SCNR

• HSVRepair

• ArcsinhStretch

• HistogramTransformation

• LRGBCombination with Lum

• CurveTransformations

• HistogramTransformation

• UnsharpMask

• MorphologicalTransformation to reduce star sizes

• Invert>SCNR>Invert

• More Curves

• Annotation

Glad you like them!

Went to visit my in-laws and and took advantage of their dark skies and (fairly) new moon. I wanted to shoot other targets throughout the night but fog or clouds came in every night around midnight. Overall I’d consider this image an improvement from my first attempt at M33 back in 2018.

This image was taken with a monochrome camera through filters for luminance (all visible light), red, green, blue, and Hydrogen-alpha (656nm), which were combined into a true color image. The Hydrogen-alpha was combined with the RGB data (described below) to enhance the hydrogen nebulae in the galaxy (all the pink splotches in the spiral arms). Captured on October 8-10, 2021 from a bortle 4 zone (Ha data from my bortle 6 driveway on the 12th).

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: 11 hours 53 minutes (Camera at Unity Gain, -15°C)

• Lum - 103x180"

• Ha - 16x300"

• Red - 36x180"

• Green - 36x180"

• Blue - 36x180"

• Darks- 30

• Flats- 30 per filter

Capture Software:

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

PixInsight Processing:

• BatchPreProcessing

• SubframeSelector

• StarAlignment

• Blink

• ImageIntegration

• DrizzleIntegration (2x, Var β=1.5)

• DynamicCrop

• DynamicBackgroundExtraction

Luminance:

• EZ Decon + Denoise

• ArcsinhStretch + histogramtransformation to bring nonlinear

RGB:

• ChannelCombinaiton to combine monochrome R, G, B stacks into color image

• PhotometricColorCalibration

• SCNR green

Adding Ha:

I followed this tutorial which does a great job explaining how to isolate and enhance just the Ha signal

http://www.arciereceleste.it/tutorial-pixinsight/cat-tutorial-eng/85-enhance-galaxy-ha-eng

• PixelMath to make Clean Ha. This effectively isolates just the Ha regions from the red continuum spectrum

Ha-Q * (Red-med (Red))

Q=0.08

• PixelMath to combine Clean Ha

• PixelMath to add Ha to RGB image ($T)

R= $T+B*(Ha_Clean - med(Ha_Clean))

G= $T

B= $T+B*0.2*(Ha_Clean - med(Ha_Clean))

B=3

HaRGB:

• HSV Repair

• ArcsinhStretch + histogramtransformation to bring nonlinear

Nonlinear:

• LRGBCombination with nonlinear L as luminance

• LRGBCombination again with galaxy masked, chrominance noise reduction applied to background

• HistogramTransformation to lower black point

• ColorSaturation to slightly desaturate Ha regions (clean Ha mask used)

• Shitloads of CurveTransformations to adjust lightness, contrast, colors, saturation, etc. (various masks used)

• LocalHistogramEqualization

• ACDNR

• Extract L channel > LRGBC again for chrominance noise reduction in the galaxy itself

• EZ StarReduction

• NoiseGenerator to add noise back into reduced stars

• More Curves

• Another round of LHE, smaller kernel radius this time

• Even more curves

• DynamicCrop to 16:9 aspect ratio

• Resample to 60%

• Annotation

Refreshing the ublock caches work most of the time however if it doesn’t, clicking the share button and then ‘embed’ just brings up a regular non-blocked video player

With tomorrow’s annular eclipse I figured I’d share my shot of the last solar eclipse over the America (please use eclipse glasses if you’re looking at tomorrow’s eclipse. There’s no totality period where it is safe to look directly at the sun.)

I had my camera set up to take about 200 photos of totality, but it got cloudy about 15 minutes before totality, and this was the best photo from the bunch. If you look close you can see spme solar prominences at the 12 and 2 o’clock positions. Captured on August 21st 2017.

Equipment:

• TPO 6" F/4 Imaging Newtonian
• Orion Sirius EQ-G
• Canon Rebel T3 (Full Spectrum modified)
• High Point Scientific 2" coma corrector

Acquisition:

• Lights- 1/8" at ISO 200

Capture Software:

• AstroPhotography Tool

Photoshop Processing:

• Auto Color
• Export as .png

Sure!

This is a photo from a lunar transit of the space station a few years ago. I had another telescope setup to take a video of the pass, and here’s a composite of the frames it took (the whole thing lasted less than a second).

I really enjoy the scale of this image, with the ISS being 540km away, and the moon some 380,000km in the background. more detailed info on the ISS Transit ISS transit can be found here courtesy of transit-finder. Captured on the morning of June 24, 2019 about 30 minutes after sunrise.

Equipment:

• Meade ETX125-EC

• AW 71" Camera Tripod

• Canon Rebel T3i (astro-modified)

• Meade #64 adapter

Acquisition:

• 1/800" at ISO 800 single exposure

Capture:

• I just held down the shutter button a second before the ISS pass occurred, and got 3 frames containing the ISS

Processing:

• AutoColor and Levels adjustments in Photoshop

• MLT noise reduction and annotation in PixInsight

They actually just got rid of the stars, now you just tip people

https://old.reddit.com/r/reddit/comments/16ryhv9/celebrating_great_content_is_as_good_as_gold/

I shot the Owl Nebula (M97) a few months ago, and barely had the Surfboard galaxy (M108) in frame. Since I shot it in narrowband, I decided to combine it with some old data I shot back back in 2021 as there’s very little narrowband signal in the galaxy. So while M108 and the stars are true color, M98 in this pic is technically false color (although kinda close if you compare it to the 2021 pic. I think this does a great job of showing how much my processing has improved in the last 2 years, as the datasets for the galaxy and stars are identical. There’s also a number of faint background galaxies in the pic.

Narrowband images were shot from a bortle Bortle 9 zone in July 2023, and the boradband was from Bortle 6 in March 2021.

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: 15 hours 38 minutes (Camera at -15°C, unity gain)

• Ha - 43x360

• L - 91x120"

• R - 29x120"

• G - 29x120"

• B - 29x120"

• 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)

• StarAlign to new Ha and Oiii stacks

• Dynamic Crop

• DynamicBackgroundExtraction 2x

Luminance Linear:

• BlurXterminator

• NoiseXterminator

• ArcsinhStretch + HistogramTransformation to stretch to nonlinear

Narrowband:

• ArcsinhStretch + HistogramTransformation to stretch to nonlinear

• PixelMath to combine Ha and Oiii images into bicolor pic (used /u/DreamsPlease’s formula)

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))

• StarXterminator to completely remove stars

• BackgroundNeutralization

• Small stretches with HT

• NoiseXterminator

• Curve adjustments

RGB Linear:

• SpectrophotometricColorCalibration

• Slight SCNR Green

• HSV repair

• ArcsinhStretch + HistogramTransformation to stretch to nonlinear

• LRGBCombination with stretched luminance as L

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

• PixelMath to add narrowband (this really only affected/overlaid the Owl nebula on top, not touching the stars, galaxy, or background)

Max(RGB , Bicolor)

• NoiseXterminator

• More curves

• invert > SCNR > invert to remove magentas from the background

• LocalHistogramEqualization (2 round of this at kernel 16 and 74 to affect different sized structures)

• MLT/SCNR for chrominance noise reduction in the galaxy

• DarkStructureEnhance

• BlurXterminator for star sharpening

• ColorSaturation

• final curves

• Resample to 70%

• FastRotation

• Annotation

Shot this back in the spring and forgot it was sitting unprocessed on my computer until now. This photo has had the saturation increased to highlight the differences in the lunar soil, which are barely noticeable to the eye when viewed through larger telescopes (usually in Mare Serenitatis or Mare Imbrium for me, at least). Tan/orange indicates iron rich minerals, and blue indicates titanium rich minerals. Captured at early in the morning on March 29th, 2023.

Places where I host my other images:

Instagram | Flickr

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 - 1000 x 2.5ms

• G - 1000 x 2.2ms

• B - 1000 x 3.6ms

Capture Software:

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

Stacking:

• Stacked the best 15% of frames in Autostakkert (autosharpened, 3X Drizzle)

PixInsight Processing:

• DynamicCrop

• ChannelCombination to combine monochrome images into RGB image

• ChannelMatch to align G and B colorchannels to red

• ColorCalibration

• HistogramTransformation (slight stretch, also applied to red stack)

• LRGBCombination using red stack as luminance

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

• SCNR green (a little)> invert > SCNR (a lot) > invert

• ColorSaturation to desaturatered color fringing around some of the craters

• UnsharpMask for additional sharpening

• LocalHistogramTransformation

• MLT noise reduction

• more curves

• Annotation