What focal length do you normally shoot at? My rig is at 610mm and I get satellite trails mostly around dusk/dawn, but they all get rejected out during stacking
What focal length do you normally shoot at? My rig is at 610mm and I get satellite trails mostly around dusk/dawn, but they all get rejected out during stacking
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:
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:
PixInsight Processing:
BatchPreProcessing (with premade JimmyFlats)
StarAlignment
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
Ha-Q * (Red-med (Red)), Q=0.75
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
I guess my astrophotography hobby has cancelled out my drinking and porn hobbies lol
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
It’s definitely real, at least for the amateur astronomy subs I (used to) mod. I suspect a lot of the traffic to askastrophotography or telescopes is from people googling stuff and browsing though mobile web, but since /r/astrophotography is just photos, most are just on the app
Probably varies a bit from sub to sub, but old reddit users are a clear minority. The vast majority use the app
Mildew is trying to sleep in today
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:
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:
PixInsight Processing:
BatchPreProcessing (with premade JimmyFlats)
StarAlignment
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 lot of those tubes run on the inside of the engine. They’re 3D printed into the engine walls as it’s being made
Oh no! Where will I go to see OF spam bots now???
Thanks! We won’t know the results for a couple weeks. The movie was dogshit!
Bad movie night with some friends tonight, and then absolutely nothing the rest of the weekend (we’re watching Adam Sandler’s first movie, Going Overboard). Just gotta make it through this mornings exam
Bye, Bob :-(
They transmit T cruzi (Chagas’ disease), which can cause heart failure
The second stage engine cover seemed to get ‘over inflated’ at T+4:07. And you can definitely see it’s in a lower orbit on the final screen right after SECO
I love procrastinating on processing my images! I got set up early at a dark site last month and decided to shoot the sun while it was still up. There were a shitload of sunspots, including AR3697 in the bottom right. This sunspot group was the one that gave us the wonderful aurora back in May (back when it was known as AR3664)
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
Moonlite Autofocuser
Astrozap BAADER AstroSolar Density 5 filter
Acquisition:
Capture Software:
Processing:
Stacked the best 25% of frames in Autostakkert, 2X resample and autosharpened
Colorized using curves in Photoshop
More lightness/Hue Adjustments
Astrosurface wavelets to remove some grid artifacts from stacking
STF applied in pixinsight
Annotatation
That shot of the forward thrusters is great!