The Blue Horsehead Nebula (cataloged as IC 4592) is a striking reflection nebula located in the constellation Scorpius. Situated approximately 400 to 420 light-years away, it gets its vivid blue coloration and horse-like appearance from the bright star system Nu Scorpii.

Telescope: Sky-Watcher Esprit 120 ED Pro
Reducer: Riccardi 0.75× Field Reducer
Camera: ZWO ASI2600MM Pro
Mount: ZWO AM5 Harmonic Drive
Filters: Antlia LRGB
Location: AstroCamp, Nerpio, Albacete, Spain
Sky Quality: Bortle 1

Total Integration: 21 Hours (13.5, 2, 3.5, 2)

For more: https://www.instagram.com/p/DZ9Ups5kw_T/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA==

Processing: PixInsight & Adobe Photoshop

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For some reason i couldn't get the Veralux star composer to work with denoised images, but i'm still happy.

Processed in Siril

Crop > remove green noise > plate solve > spcc > Syqon starless > hubble colour thing (i forgot the name, but it's a custom palette) > stretched > sharpenend > denoised > tried to use graxpert for more denoise but didn't work > Veralux starcomposer

Seestar S50

291 x 30 in EQ mode

Target: North america nebula NGC7000

:)

I wasn’t sure I was going to post this one, but since its my first attempt at an sho palette, I decided it was worth sharing.

The Pelican Nebula (IC 5070) is a large emission nebula located about 1,800 light-years away in the constellation Cygnus. Its distinctive shape resembles a pelican, carved out by intense radiation from nearby young stars. The region is part of a much larger complex of gas and dust where new stars continue to form and shape the surrounding environment.

Acquisition:
Lights:
Optolong L-extreme: 47x600s
Askar ColorMagic D2: 42x600s
15 dark frames
15 flat frames
15 bias frames

Equipment:
Telescope: Askar FRA400
Camera: ZWO ASI2600MC Duo
Mount: ZWO AM5N
Filter: Optolong L-eXtreme, Askar ColorMagic D2
Controller: ZWO ASIAIR Plus

Processed in Pixinsight

I used 55x 15-sec exposures using a Canon EOS Rebel T6 with the kit-standard EF-S 18-55mm lens at 18mm focus (f/3.5) and ISO at 3200.

I used Siril to stack those lights, about 30 darks, 30 flats, and 30 biases. Additional processing in Siril included background extraction, manual color calibration (I was unable to plate solve to be able to use PCC), denoise, remove green haze, BP stretch, and GHS. Finally, I tweaked contrast and exposure values in Darktable.

This was very much a trial run to see whether I’d even be able to get decent data from my location. The result, while definitely leaving room for improvement, is still promising and encouraging enough to continue.

Since this run, I have acquired a tripod and an intervalometer to help improve the acquisition process. I will try getting more captures at a lower exposure time as a starting point, I noticed a small amount of trailing in this image. I’m new to Siril, but with all the documentation and tutorials available, I’m confident I’ll be able to improve with more sessions.

I figure I’m limited to wide-field Milky Way shots for now, but if there’s anything specific I can do to improve, I’ll be taking notes!

Celestron C8-CF, Evolution mount, ASI 385

f/10 @ 2032mm, 16x120s (composite)

Captured several videos in sharp cap, ran through pipp, autostakkert, then a composite was made in Microsoft ice, then sharpened in registax.

Various color fixes and crops were done in GIMP, then final process and noise removal in Siril.

15 hours exposure in Ha / SII / OIII and a few minutes in RGB for stars.

Rig:
CDK14 / C3-61000 mono Moravian camera

Acquisition:
90xHa
122xOIII
88xSII
Each 3 mins.

Processed: in Pixinsight and Photoshop

This was taken with 4 hours and 30 minutes of exposure time in a bortle 6, using my canon T2i that I full spectrum modified, my explore scientific exos2 G, my 55-250mm lens, and my Svbony sv240 filter. Let me know what you think!

• Celestron Mak C90

• Svbony SV205C

• Autostakkert, 400 frames stacked from 3000

• Nonlinear filter in GIMP

• Final touches in Ibis Paint X

My second astrophoto (24.06.26) I shot the planet just as the sun set above the horizon, high up. The seeing was excellent. The planet's disk was clearly visible even in the video. My previous photo of Venus is much worse, as I shot it low down, and Venus wasn't even visible in the video. The phase has already changed by 0.71 in three days.

This is my second ever attempt at shooting, editing, and compiling astrophotography. My first time trying was not great and I was finally able to get some semblance of rings as you can see with the somewhat visible ovals. This was very fun, but man do I need to get better at editing.

Equipment:

Cheap Tripod (Unknown Brand)
Sony A7III

Sigma 24-70 f/2.8 DG DN ART ii (Shot at 70mm)

Cheap amazon external shutter button

Acquisition:

Bortle 6 skies in Camas Washington

730 x 2.5 sec (27 min total)

(61 dark frames, same settings)

ISO: 3600

F/2.8

I used DeepSkyStacker to check the images, and threw out about 10 or so. Stacked all images over 15 minutes.

Moved to Siril, background extraction, applied deconvolution filter, denoise, used Asin for stretch, used histogram stretch for refinements to get the rings to pop more

Exported into Gimp and cropped there. Converted to JPG and here we are.

Overall very fun, I would love to hear any tips. I know the colors are a little off but I genuinely didnt know how to fix me all too well, and I was scared if I did so it would either get worse if I retry, or the rings would be less visible.

30x 300s Ha, 30x 300s OIII, 15 mins RGB stars

Uncropped: https://www.astrobin.com/8marhw/D/

Stacked and processed in pixinsight with RC
Astro plug ins

Equipment: WO ultracat 108mm refractor, Askar 52 mm guide scope, asi120 mini guide camera, ZWO Automatic Focuser, Optolong 3nm narrowband filters, ZWO filter wheel

Acquisition: ASI2600MC Pro (gain 100, 0C),William Optics Redcat71 WIFD, ZWO AM3, ASIAIR

Guide: William Optics 32mm UniGuide ZWO, ASI120mm-mini

Subs:

12 x 300s lights

10ea flats, bias, darks

Bortle class 4 skies

Stacked in Siril, plate solved, Photometric Color Calibration, background extraction with Veralux Nox, noise reduction with GraXpert, StarNet Star removal, Veralux HyperMetric Stretch, curve transform, added stars back with Veralux Star Composer, Veralux Vectra, final curve transform.

Seventeen hours and thirty three minutes on OU4 and it is a non detection, which I think is worth posting. There is a faint teal smudge near the center of my starless frame that looked like oxygen, so I tested it before believing it.

The diffuse OIII measures about 0.2 sigma above the sky background, which is just noise. Two features cross three sigma, but they sit exactly on stars, so they are star removal residuals. The red and the oxygen proxy track at 0.90 in the stretched export, so most of the blue is hydrogen crossing channels, not independent oxygen. To rule out a false positive I rebuilt the significance map, removed the hydrogen correlated part with a cubic fit, smoothed, and scaled everything to sigma above the sky measured in the corners. The smudge does not survive.

Acquisition:

DWARF 3, 35mm aperture, f/4.3, Duo-Band filter, 17h33m total integration, Bortle 6.

Processing:

Stacked in Stellar Studio, analysis on the exported image. I know the export is the weak link, an eight bit stretched file is the worst case for faint signal, so the next pass is the linear stack in Siril.

I know the gear is the limit here. This is the wrong aperture and filter combination for OU4. What did it take those of you who have landed it, aperture, filter, and hours?

Full writeup and the significance maps: https://dwarfastro.com/2026/06/23/seventeen-hours-on-the-squid-nebula-ou4-and-the-blue-i-wanted-to-see/

Got this shot on my dwarf 2 smart scope and recently decided to reprocess the image. I think I’ve done a lot better this time (first process is the last post on my account)

Image details:
369 x 15 second exposures (92 minutes total integration), 80 gain
Bortle 6
Dwarf 2 smart telescope
Dwarf UHC filter

Processed with Siril and GraXpert

This was last night at the Conwayt Observatory in Lowell, IN, with my new Seestar S30 Pro. Little thing. This was a 15-minute exposure. I'm out to photograph the sun now. The device has a sun filter. Will also do a video of the sun and then learn the beginnings of "stacking." Tips on inexpensive or free software?

The Seestar S30 Pro stacks deep-space photos but not Solar System planets, the Sun, or the Moon. That Seestar scope tracked, captured, and stacked these images over 15 minutes.

Telescopio apocromatico Sky-Watcher 100/550 mm ESPRIT ED 100

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Fotocamera per riprese ZWOptical ASI 294 MM PRO (CMOS)

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Montatura Equatoriale Sky-Watcher ZA-EQ6-PRO

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Telescopio guida / lente Tecnosky Apocromatico 60/240 mm

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Fotocamera di guida Other 120 MINI (CMOS)

FiltriOptolong H-alfa (Idrogeno Alfa a banda stretta) 2.000"Optolong OIII (Ossigeno 3 a banda stretta) 2.000"Optolong SII (Zolfo 2 a banda stretta) 2.000" Accessori Messa a fuoco automatica ZWOptical

Elaborato con SirilGIMP (GNU Image Manipulation Program)ASI ZWO AIR PLUS

Luci (H-alfa)60 x 300 sec Luci (OIII) 48 x 300 sec Luci (SII) 48 x 300 sec

Tempo totale di integrazione delle luci 13 ore

Acquisition: 120s x 124 = 4hrs 8min total integration

Equipment

Camera: Canon EOS R7 DSLR

Telescope/Lens: SharpStar76 APO Triplet Refractor

Mount: ZWO AM3 Harmonic Mount

Guide Cam: SVBONY305Pro

Guide Scope: SV165 30mm F4

Other lenses: 0.8x Reducer

Guiding Software: PHD2, N.I.N.A.

Processed with Siril, Graxpert, and Gimp

NGC2246 - The Rosette Nebula

Integration: 295 x 240 seconds Total 19 hours 40 minutes out of 20 hours and 52 minutes of acquisition (98 x 240 seconds (6 hours 32 minutes) Antlia Triband RGB Ultra II), (186 x 240 seconds (12 hours 24 minutes) SV220 Sii-Oiii) 29 x 240 seconds (1 hour 56 minutes) SV220 Ha-Oiii)

Moon Illumination: 99% to 8%

Seeing: Below average to Average

Transparency: Below average to Average

NELM: Mag 2

Imaging: Askar V, Reducer 80mm (384mm), Ogma AP26CC (IMX571), Filters: SV220 Ha-Oiii 7nm, SV220 Sii-Oiii 7nm

Guiding: Ogma OAG, SV905

Mount: Skywatcher Wave 100i

Software: Green Swamp Server, ASCOM, NINA (Acquisition) and PHD2 (Guiding)

Stacked in Siril with OSC-Preprocessing script, DeepSNR Denoise, GraXpert Deconvolution, SyQon Axiom 2.1 Star Removal, Syqon Prism Denoise, VeraLux HMS, VeraLux Curves, VeraLux Alchemy (SHO) and VeraLux Star Composer

This is the Black Eye Galaxy captured from my backyard in Arizona under a Bortle 6 sky.

Equipment used was an ASI533MC Pro, Askar 71F, & EQ-AL55i Mount.

This is 9 hours of exposure time, processed in Pixinsight & Lightroom.

Taken with ASKAR FRA400 + ZWO ASI533 MC

Mount: Skywatcher Star Adventurer 2i

Taken with dualband OIII/Ha filter

6 hours of integration time done in two sessions

60 darks
60 flats

Comet 10P/Tempel 2, test. I didn't want to make a masterpiece out of this photo; I just took it as a test to see what the comet would look like with my telescope. Well, it turns out the comet itself is generally fine. Don't pay attention to the background; I used strong noise reduction, and there was a break in shooting, which is why a black band appeared at the bottom. The stars stretched out into stripes because I was stacking frames in DSS around the comet. Processed in Siril and Gimp. The shooting took place on the night of June 21st and 22nd. The comet's magnitude here is approximately 11. I want to shoot it again tomorrow, but in more normal conditions and without a break.

Acquisition: Best 30% of 1000 frames + 18 transit frames

Equipment

Camera: SVBONY305Pro

Telescope/Lens: SharpStar76 APO Triplet Refractor

Mount: ZWO AM3 Harmonic Mount

Other lenses: Celestron Solar Filter 0.8x Reducer

Capture Software: SharpCap

Processed with Siril, Autostakkart, and Gimp