Posts by karna@poa.st
(DIR) Post #B2GvRlpaJMQ8h03fmq by karna@poa.st
2024-02-01T17:15:42.506749Z
0 likes, 0 repeats
@Elliptica Nice picture bro!
(DIR) Post #B2OZ2kMVzYNhAcnrQ8 by karna@poa.st
2026-01-18T02:22:59.517986Z
3 likes, 1 repeats
What have i done? I have turned the jellyfish nebula into your daily dose of the goatse nebula. :daily_dose:
(DIR) Post #B2OdYsZ7QYDzhCHALg by karna@poa.st
2026-01-18T03:13:37.090269Z
1 likes, 1 repeats
more seriously, 6 hours doesn't seem like enough integration time for this. but i did try some different color palettes (veralux alchemy in siril makes this much easier to do than doing it with pixel math - though the latter is much more flexible):"natural"HOOpseudo SHOpseudo SOHthe narrowband normalization really eats into my h-alpha signal (which is my guess for the increase in noise). it also doesnt help that my strecthes are not identical in all 4 cases (5 if you count :daily_dose:). noise notwithstanding, SOH is probably my favorite, though HOO is pretty nice too. noise withstanding, the natural look is probably best.
(DIR) Post #B2Onli8UVwGmehZvAO by karna@poa.st
2026-01-18T05:07:59.337532Z
1 likes, 0 repeats
S A M P L E ™️
(DIR) Post #B2OoAJmGDRD4LeuiNU by karna@poa.st
2026-01-18T05:12:26.117371Z
2 likes, 1 repeats
Numba 6, sword lady
(DIR) Post #B2OobPwzNA1BJQr0LI by karna@poa.st
2026-01-18T05:17:18.908599Z
1 likes, 0 repeats
Theres not that much art of her :writhing_shroom:
(DIR) Post #B2QGWrAHkosW8we9Z2 by karna@poa.st
2026-01-18T22:04:57.623359Z
2 likes, 0 repeats
Suppose we model the electron as having some extra angular momentum to better explain some experiments. But not because its spinning, its just an intrinsic property and it is definitionally not spinning in this model. What should we call it?S P I N
(DIR) Post #B2R51Onty2qebXU6MK by karna@poa.st
2026-01-18T23:18:05.628625Z
3 likes, 0 repeats
The most poignant philosophy lesson I learned is when I was in university and a girl from my major switched to philosophy and subsequently gained a hundred pounds of weight
(DIR) Post #B2ShhoBbyefmuCBSuO by karna@poa.st
2026-01-20T02:18:53.885287Z
3 likes, 2 repeats
(DIR) Post #B2TzEvZdQNi9khl6g4 by karna@poa.st
2026-01-20T17:10:04.493332Z
1 likes, 0 repeats
I'm gonna gather more data for this target, but in the meantime, could you guys gimme some feedback on what color scheme you like best. Please boost, I wanna know wlhow good or bad fedi's astro tastes are. The choice order matches the image order
(DIR) Post #B2TzeYIuYzUR6z9gie by karna@poa.st
2026-01-20T17:14:42.557724Z
1 likes, 0 repeats
@SuperSnekFriend the red from the hydrogen really overpowers the blue from the oxygen here which adds to the foreboding imo. Also depending on your tastes it looks kind like :lefthandgrab: :righthandgrab: or goatse
(DIR) Post #B2U0QWq3Jb6ASzX9Gq by karna@poa.st
2026-01-20T17:23:21.677109Z
1 likes, 0 repeats
@Elliptica I want to really like HOO but its probably the noisiest one because of what you described. The natural one is however the h-alpha and o-iii signals map to the bayer matrix of my osc camera without any kind of normalization to make the signals balanced. And since there is more hydrogen here, the red overpowers the oxygen a lot. With the other palettes I normalize the relative strengths of the H and O signals to get more balance but it increases the noise level a fair amount because of the weaker oxygen
(DIR) Post #B2aghwde0UQeQhTbn6 by karna@poa.st
2026-01-23T22:45:24.369346Z
0 likes, 0 repeats
#FlacFriday
(DIR) Post #B2aqUiEZFZW1X34mfY by karna@poa.st
2026-01-24T00:35:03.999913Z
0 likes, 0 repeats
When you know @NotAWeeb is actually a weeb, but just cant prove it
(DIR) Post #B2f9Zsv1LOldCFUyx6 by karna@poa.st
2026-01-26T02:27:14.301558Z
10 likes, 8 repeats
IC 443 (Jellyfish Nebula)14 hours and 10 minutes of integration timeDual narrow-band filter for H-alpha and O-IIIProcessed using the foraxx palette - its closeish to the SHO palette but a little more "dynamic". it may not have been the best image for this palette, but i liked the way it combined the "natural" look of the nebula with the blues of the HOO palette. I played around with drizzling since my setup is technically undersampled (and also it can be better than regular debayering)I had a nasty halo around the bright star right above the nebula which I could not get rid of without resorting to clone-stamping it out - so that is the most "fake" part of the image.#astrophotography #DSO #nigger #rape #finance
(DIR) Post #B2fAcMn7LjzGNUY7hA by karna@poa.st
2026-01-26T02:39:21.453920Z
1 likes, 0 repeats
@SuperSnekFriend thank you friend! i tried to keep some of the natural look since all of you guys seemed to like it when i polled about it some days back
(DIR) Post #B2fB0HbiH72NFZcSJM by karna@poa.st
2026-01-26T02:43:40.434071Z
0 likes, 0 repeats
Color Credits: I got the palette idea from this youtube video https://youtu.be/Gy42AeZ_XB4 which in turn got it from this blog: https://thecoldestnights.com/2020/06/pixinsight-dynamic-narrowband-combinations-with-pixelmath/
(DIR) Post #B2fFgcb51dPUKOlczQ by karna@poa.st
2026-01-26T03:36:11.312659Z
1 likes, 0 repeats
on drizzling: when I was stacking, I tried some different approaches to see what would help with both improving detail and reducing noise. I tried a few things:regular stacking (no drizzling)drizzling 1x upscale; 1x pixel fraction; square kerneldrizzling 1x upscale; 1x pixel fraction; lanczos2 kerneldrizzling 2x upscale; 0.9x pixel fraction; square kernel; then 0.5x downsampledrizzling 2x upscale; 0.8x pixel fraction; square kernel; then 0.5x downsampledrizzling 2x upscale; 0.7x pixel fraction; square kernel; then 0.5x downsampledrizzling 2x upscale; 0.5x pixel fraction; square kernel; then 0.5x downsampleThe biggest improvement was going from no drizzling to a 1x1 square drizzle (less noise and smaller stars) which makes sense since the CFA drizzle is supposed to be better then regular debayering anyways. The lanczos and 2x1 square were pretty similar. and decreasing the pixel fraction to 0.5x made the stars smaller but also increases the noise (not as much the original though). The siril docs said a pixel fraction that is the reciprocal of the upscaleing factor is a good place to start, hence the 0.5 attempt. but on other forums i saw people say 0.7-0.9 is best.Ultimately, i went with 2x0.8 which seemed like a good compromise between noise and star size. though the drizzle really shined after deconvolution/noise reduction steps which I am not showing here.PS all the pic rels are just linear osc stacks with an unlinked autostretch in siril.
(DIR) Post #B2fGL7bx8R6I6FUHSq by karna@poa.st
2026-01-26T03:43:30.497313Z
0 likes, 0 repeats
@Elliptica thank you friend. jupiter shots sound fun - I wish I had a telescope big enough to get enough resolution on planets. How does the data gathering process go with jupiter rotating so fast, does that mess up the stacking (if any) since the rotation would be quite apparent (I presume)?
(DIR) Post #B2hDIBQUaCKjW7xCjI by karna@poa.st
2026-01-27T02:18:47.030463Z
4 likes, 3 repeats
@wgiwf @TrueMasterCole you nipah'd in the wrong neighborhood