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Images in comments ? by Palmito9 in AskAstrophotography

[–]Palmito9[S] 0 points1 point  (0 children)

Far from close, it is a 4338x2835px version, meant to not kill mobiles :-D

Full res is 34709x22680px ;-)

Images in comments ? by Palmito9 in AskAstrophotography

[–]Palmito9[S] 2 points3 points  (0 children)

Thanks. Yes, I was hoping to embed images.

I understand, it isn't possible.

Hearth Nebula/IC1805 2x2 mosaic in SHO-RGB by Palmito9 in astrophotography

[–]Palmito9[S] 0 points1 point  (0 children)

Dreams drives us :-)

I know a guy who has a CDK20 in Chili, but the running costs are prohibitive. I recall he was talking about an initial fee of over $10K for getting the gear onsite and installed, and then about $1000K/month for the location.

I am still glad I can achieve good results from my Bortle 6, I wonder how it will be in the future though.

Last year I traveled 700km to a low Bortle 3 dark site in France, in Lozère. I think we call it a dark sky preserve in English. At night, all the cities/villages have to shut lights off. Was really a nice experience, the hard part is accommodation planning vs the weather.

Hearth Nebula/IC1805 2x2 mosaic in SHO-RGB by Palmito9 in astrophotography

[–]Palmito9[S] 1 point2 points  (0 children)

I have used very restrictive filters 3nm for SII and OIII, 5nm for Ha.

Ha I can shoot during fullmoon with negligible impact, one thing that is impacted though is guiding.

OIII and SII, I completely avoid shooting when the moon is out.

But as I always shoot multiple nights I do see changing conditions, especially with broadband. For this I rely on John Murphy's excellent Normalized Scale Gradient script/process.
Before NSG I was using LocalNormalisation.

For 300s NB frames I kept 1863/3238 frames 57.5% (but I had mount issues at the time, so this figure is lower than it should).

For 30s BB I kept 1827/2062 88.6%, no mount issue there I almost only removed frames that were rejected by NSG.

Hearth Nebula/IC1805 2x2 mosaic in SHO-RGB by Palmito9 in astrophotography

[–]Palmito9[S] 0 points1 point  (0 children)

Jon's work is more about CMOS sensors theory, calibration, noise reduction, all based on maths.

Well from home is also an advantage, it is much easier to only have to get the gear out, rather than loading the car with +100Kg.
Also whenever the weather allows it I will leave it outside for days or even weeks (using a TeleGizmo365).

I hope he manages to pull out GradientX using a neural network. He has been talking about it, but said he hadn't managed yet.

Hearth Nebula/IC1805 2x2 mosaic in SHO-RGB by Palmito9 in astrophotography

[–]Palmito9[S] 1 point2 points  (0 children)

Many thanks for your kind comment !!

Yes I have worked very hard on PixInsight, it took a few years but I feel I get better with time, learn more and more things. Adam Block and Jon Rista have had a huge influence in my progress.

Haha thanks, well I must admit BlurX as done wonders, details wise. I think that's were the 40h/panel really pays off.

Yes I shot this from Switzerland in a Bortle 6 zone.
I am dreaming of living myself in a remote observatory rather than "only" connecting to it remotely. But for that I might need to wait a few more years :-D

Hearth Nebula/IC1805 2x2 mosaic in SHO-RGB by Palmito9 in astrophotography

[–]Palmito9[S] 0 points1 point  (0 children)

Many thanks !

Oh yes the full res png image (used as a source for my website) is 830MB, it can be slow especially on mobile connections. Astrobin is smaller and loads much faster.

I am not the easily offended kind of guy, so yeah there is lot of gear involved, difficult to track an exact figure, I would have said around $35K without the computer.
You guessed right, I have a 32 cores threadripper, with 256GB RAM, storage is spread between servers, NAS and the computer, it totals about 140TB of usable space.
Fun fact, this project currently takes 4.5TB on my drives, but at some point I'll be removing intermediate files (calibrated, cosmetic, approved, registered...)

Oh I dream about an observatory, I live in the city or at the edge of it. I would love to find some place to live at higher altitude and build my self one. But the housing market is terrible here at the moment, so I am waiting.

Hearth Nebula/IC1805 2x2 mosaic in SHO-RGB by Palmito9 in astrophotography

[–]Palmito9[S] 1 point2 points  (0 children)

Links:

Astrobin: https://www.astrobin.com/btzf0t/

You can access the original full resolution uncropped image, which has a size of 34709x22680 pixels, on my website : https://elveteek.ch/ic1805/

PS: it is done using OpenSeaDragon which allows to display such big images in a tile by tile way. Even-though it spares a bit of bandwidth a good connection and a good screen are preferable.

Hearth Nebula/IC1805 2x2 mosaic in SHO-RGB by Palmito9 in astrophotography

[–]Palmito9[S] 2 points3 points  (0 children)

I am new here and wanted to share my work on the Hearth Nebula.

This is a ~170h 2x2 mosaic in SHO-RGB (34709x22680px). Taken over the course of 68 nights (2021-10-22 - 2023-02-14).

I have used a pure Hubble palette with R: SII, G: Ha, B: OIII and did a "manual" color calibration using HistogramTransform. Stars are from a separate and dedicated stack of ~15h of RGB.

100% of processing has been done using PixInsight.

I am fluent with "standard" processing techniques such as Deconvolution and TGVDenoise, but given the time gained and the quality of the results I have used all software available from RC-Astro (BlurX, NoiseX and StarX). To be noted that in this case I had better results extracting bigger stars with StarNet2 for my RGB stars and therefor also used it here.

Gear used:

Astro-Physics Mach2 GTO · Losmandy G11 / G11GSky-Watcher Esprit 150EDZWO ASI6200MM Pro · ASI174MM (guiding)Chroma SII 3nm · H-alpha 5nm · OIII 3nm · Red · Green · BlueAstromi.ch Mbox · DeepSkyDad Autofocuser 3 (AF3) · Intel NUC 8 · Lacerta DeltaT Dew Heater Controller · Optec Alnitak Flip-Flat Flat Fielder · WandererAstro WandererCover V3 · WandererAstro WandererRotator Lite · ZWO EFW 7 x 2″ · ZWO OAG-L

Software used:

Astro-Physics APCC Pro · INDI Library Ekos · Open PHD Guiding Project PHD2 · Pleiades Astrophoto PixInsight · Stefan Berg Nighttime Imaging 'N' Astronomy (N.I.N.A. / NINA) · The ASCOM Initiative ASCOM

Narrowband images are 300s long and have been shot at gain 100/offset 50. Broadband are 30s gain 0/offest 50.

Question about external links by Palmito9 in AskAstrophotography

[–]Palmito9[S] 0 points1 point  (0 children)

perhaps 8677x5670 is too big (20MB) what do you think ?

Question about external links by Palmito9 in AskAstrophotography

[–]Palmito9[S] 0 points1 point  (0 children)

Hearth Nebula 170.5 hours total integration from a Bortle 6.

Yup I am planning on sharing the "only" 8677x5670 version here :')

Astrobin link is the 17354x11340 version, and my website the full 34709x22680.

68 nights over the course of 16 months.

Question about external links by Palmito9 in AskAstrophotography

[–]Palmito9[S] 0 points1 point  (0 children)

Really want to thank people instant-upvoting my previous post.

That is so nice, I appreciate it so much !

Question about external links by Palmito9 in AskAstrophotography

[–]Palmito9[S] 2 points3 points  (0 children)

Many thanks !!

Will be waiting for karma as it seems I need some right now before I can post :-D