23% Waxing Crescent [OC]
lefty7283 @ lefty7283 @lemmy.world Posts 41Comments 110Joined 2 yr. ago
lefty7283 @ lefty7283 @lemmy.world
Posts
41
Comments
110
Joined
2 yr. ago
So it turns out camera sensors are perfectly fine being exposed to the last ~20 seconds of sunlight before an eclipse. I’ve decided that if I still have this cam in 2045 I’m going to sacrifice it to the sun by not putting the filter back on after totality, and letting it document its own demise.
Holy shit this was the most awesome thing I've ever experienced. I've been prepping for this eclipse ever since I got clouded out at the last minute for the 2017 eclipse, and almost everything went perfectly! (I didn't even hit eclipse traffic on the way home!) With the camera automated I got 163 HDR pics during totality, plus more from the partial phases, so expect to see some more pics in the coming weeks!
I really like how the diffraction spikes turned out from the Bailey's Beads, and how the blue turned out in my totality pics. I tried to keep the editing minimal on this, and just did some minor contrast and saturation adjustments (see below for more details). The corona in the image is definitely bluer than how it looked irl (which was mostly just white), but the prominence color is pretty close to what I saw through my other scope. I suspect it's because of the custom white balance I've had to use for my astro modded cam. For those curious here are my other C2 pics, unedited other than cropping
Captured on April 8th, 2024 from Sikeston, MO.
Places where I host my other images:
- 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
- Just a crop, and some minor adjustments to exposure, contrast, shadows, whites, and blacks
The Little Dumbbell Nebula gets its name because it kinda looks like a tinier version of the Dumbbell Nebla M27 (yes, a different palette was used for this pic). It's really tiny compared to the uncropped FOV. I'm a lot happier with this attempt at it, compared to my 2019 pic of M76 with the same equipment. I know It's a bit out of season rn but I needed something to shoot at the start of the night. The nebulosity itself is false color, but the stars are true color RGB. Captured over 10 nights in Feb/Mar 2024 from a bortle 9 zone (I could only get a couple hours max per night on it.
Places where I host my other images:
- 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: 21 hours 6 minutes (Camera at -15°C), NB exposures at unity gain and BB at half unity
- Ha - 99x360"
- Oiii - 83x360"
- R - 101x60"
- G - 100x60"
- B - 99x60"
- 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
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 to stretch each channel the rest of the way.
This is a great new pixinsight script from Sketch on the discord. 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
- HSV Repair
- StarXterminator to generate a stars-only image
- ArcsinhStretch + HT to stretch nonlinear (to be combined with starless narrowband image later)
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
- Shitloads of Curve Transformations to adjust lightness, hues, contrast, saturation, etc
- LocalHistogramEqualization
- UnsharpMask
- More curves
- ColorSaturation to slightly desaturate the purples
- 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
(again, credit to Jimmy independent starless processing stuff)
mtf(.005,
mtf(.995,Stars)+
mtf(.995,Starless))
- Couple final curves
- DynamicCrop waaaay in on the nebula
- Annotation
Kinda as a joke I designed a house for astrophotography in sweethome 3D. You can also export the whole 3D house model into unity and upload it to VRChat to actually walk around inside it
I ended up getting their PM. I’m not touching their stock with a 20ft pole.
Thanks!
So I shot the Bubble Nebula in true-color last year, but I decided to shoot it again this past month in false color. It really helps to show the extended nebulosity, and gives me and excuse to compare my image to Hubble's. This false color image uses the SHO palette, where the sulfur-ii wavelength is mapped to red, hydrogen-alpha to green, and oxygen-iii is blue. I'm really happy with how the colors turned out on this one. There's also a number of other nebulae and a star cluster in frame. Captured over 14 nights in Jan/Feb 2024 from a bortle 9 zone (I could only get a couple hours max per night on it.
Places where I host my other images:
- 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: 37 hours 36 minutes (Camera at -15°C), Camera at unity gain.
- Ha - 95x360"
- Oiii - 140x360"
- Sii - 141x360"
- 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
Narrowband Linear:
- Blur and NoiseXTerminator
- Duplicated the images before stretching to be used for separate stars-only processing
- Slight stretch using HistogramTransformation
- iHDR 2.0 script to stretch each channel the rest of the way.
Stars Only Processing:
- PixelMath to combine star images (SHO palette)
- SpectroPhotometricColorCalibration (narrowband working mode)
- StarXTerminator to make stars only image form each channel
- SCNR > invert > SCNR > invert to remove greens and magentas
- ArcsinhStretch + HT to stretch nonlinear - to be combined later with starless pic
Nonlinear:
- PixelMath to combine stretched Ha, Oiii, and Sii images into color image (SHO palette)
- StarXterminator to remove stars
- HistogramTransformations to tone back the greens and apply a more aggressive stretch to red and blue channels
- Shitloads of Curve Transformations to adjust lightness, hues, contrast, saturation, etc
- LRGBCombination with stretched Ha as luminance
- DeepSNR
- more curves
- ColorSaturation to bring up the blues in the bubble
- LocalHistogramEqualization
- even more curves
- MLT for chrominance noise reduction
- 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
mtf(.005,
mtf(.995,Stars)+
mtf(.995,Starless))
- A round of NoiseXterminator for good measure
- Resample to 60%
- Annotation
They shut it down last September. It’s nsfw spinoff redgifs is still up.
https://github.com/Balackburn/Apollo
You'll have to install AltStore (or Sideloady) on your computer + phone to resign the app each week (this can happen automatically if they're on the same wifi network). You can make your own personal API key at https://old.reddit.com/prefs/apps/ (It's limited to 100 requests per 10 mins, which you wont run into browsing by yourself). Also as long as you moderate a subreddit (I think even if it's just an empty one you make), NSFW content wont be blocked on the API.
Also while you're sideloading, I'd highly recommend uYouPlus for a better youtube app
It’s at least possible to sideload Apollo and use your own API key for it.
Well I guess that’s one way to be a smart-ass
M17 is also known as The Swan Nebula (the bright core is swan shaped, esp when viewed visually through a telescope). Also pictured it the M18 star cluster off to the right.
I originally shot this back in 2019 and decided to reprocess it since we have fun new tools and techniques (and I kinda know what I'm doing now with narrowband processing). I decided to keep the palettes similar overall, but with a less agressive stretch and more 'natural' look to the nebula. The noise reduction is a lot better when comparing the images at 1:1 (long gone are the days of TGV/MMT noise reduction!). Captured over 2 nights at the in May, 2019 from a Bortle 7 zone.
Places where I host my other images:
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
- Agena 50mm Deluxe Straight-Through Guide Scope
- ZWO ASI-120MC for guiding
- Moonlite Autofocuser
Acquisition: 8 hours 10 minutes (Camera at Unity Gain, -15°C)
- Ha- 42x300"
- Oiii- 56x300”
- Darks- 30
- Flats- 30 per filter
Capture Software:
- EQMod mount control. Captured using N.I.N.A. and PHD2 for guiding and dithering.
PixInsight Processing:
- BatchPreProcessing
- Blink
- ImageIntegration
- DrizzleIntegration (2X, VarK 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
Narrowband Linear:
- BlurXTerminator
- NoiseXTerminator
- STF Applied via HT to stretch nonlinear
Nonlinear:
- PixelMath to combine monochrone Ha and Oiii channels into color image (using ForaxX's bicolor palette):
R = Ha
G= ((OiiiHa)(Oiii\*Ha))\*Ha + \((OiiiHa)~(OiiiHa))Oiii
B = Oiii
- SCNR Green
- LRGBCombination with stretched Ha as luminance
- Shitloads of curve transformations to adjust lightness, contrast, hues, saturation, etc
- LocalHistoGramEqualization 2x - one at scale 16 for fine details and one at 512 for large structures
- More curves
- DarkStructureEnhance
- MLT for small scale chrominance noise reduction
- NoiseXTerminator
- Even more curves, some masked to just the core of the nebula
- Resample to 60%
- Annotation
I feel like at some point they’ll kill off old.reddit
Mercury would be a denser propellant than xenon/other Nobel gasses used for ion thrusters in orbit. There’s been a ton of other insane fuel types proposed over the years which thankfully haven’t been used (although a lot of rockets have and still use toxic hypergolic fuels like hydrazine)
Good vid going over some of these fuels: https://youtu.be/_wLk2j7_KB0
Funnily enough I used the little guy to replace the smaller red camera on the scope after it started failing on me
Astrophotography. Hell, just photography in general.
Bunch of dust and gas floating in space
Figured today is an appropriate day to post this. This nebula is also known as NGC 2264 I'm fairly certain the christmas tree is the entire nebula when the photo is inverted, and not just the cone nebula at the very end of it. Captured on November 17th, 2022, from a Bortle 4 zone.
Places where I host my other images:
- 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: 4 hours 2 minutes (Camera at half unity gain, -15°C)
- L- 62x120"
- R- 20x120"
- G- 20x120"
- B- 19x120"
- Ha -47x300" x 2 panels
- 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)
Linear:
- DynamicCrop
- automaticBackgroundExtraction
- EZ Decon
- NoiseXTerminator
Stretching Luminance:
- MaskedStretch to 0.1 background
- Starnet++ starmask made, subtracted from 0.3 Gray image and colvolved
- Previous image used as a mask to stretch nebulosity without stretching stars
- Normal HistogramTransformation
RGB Linear:
- Channelcombination to combine monochrome images into RGB image
- SpectroPhotometricColorCalibration
- SCNR green
- HSV Repair
- ArcsinhStretch + HT to bring nonlinear
Nonlinear:
- LRGBCombination with stretched luminance
- Shitloads of CurveTransformations to adjust lightness, saturation, contrast, hues, etc.
- Extract L --> LRGBCombination for chrominance noise reduction
- More curves
- SCNR to remove some background greens
- LocalHistogramEqualization
Two rounds of this. one at size 16 for the finer 'feathery' details and one at size 500 for large scale structures
- ColorSaturation
- even more curves
- NoiseXTerminator
- EZ Star Reduction
- noise generator to add noise back into star reduced areas
- MLT for chrominance noise reduction
- Resample to 60%
- Annotation
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:
Acquisition: (Camera at Unity Gain, -15°C)
Capture Software:
Stacking:
PixInsight Processing: