Would've expected more than this in 12 hours, but I guess Samsung's tiny sensor is the reason for this.

The first 4 hours of data. We'll see how it evolves

Yes. It's taken with the S24 Ultra on a tracked tripod. Just extremely long exposures.

At 72 hours across 23 nights, this is currently the longest running project that I'm doing with my good ol' trusty phone. Quite a few sharpless nebula are visible.

/

Acquisition: (under bortle 7-8 sky, various moon phases)

\- S24 Ultra, 50MP, 5× zoom (115mm equivalent), f/3.4, 1/2.52" sensor

\- Optolong l-eXtreme, moment cinebloom filter

\- Move Shoot Move tracker

\- 30s, iso 3200, 5500k white balance

\- Lots of light frames (>8500), and some 50-100 dark frames per night

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Stacking:

\- Siril (3-tiered: Batch, Daily Master, Final Master)

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Post processing:

\- GraXpert: Gradient removal (initial pass, secondary pass on starless), noise removal on starless.

\- starnet2: star and background separation (for some reason the red-blue hue is flipped after starnet.

\- Siril: Green noise removal on hue-flipped starless

\- GIMP: curves, star screen

\- Lightroom: make it pretty on the phone screen

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I'll probably let this project run for a little bit, before moving onto two ultimate projects over the next few years.

Sitting slightly over 72 hours, I doubled the time from the last time I posted here. Taken with the s24 ultra, bortle 7.5

Learned techniques:

- Starnet, independent star and background processing

- wavelet decompose on GIMP

Done under a bortle 7-8 sky with a phone.

S24 Ultra 5× zoom, l-eXtreme, MSM Nomad tracker, 30 sec iso 3200 exposures. Current version is done across 16 nights. Darks for each night included.

Stacked in Siril (three tier: Batch, Daily, Master). GraXpert for 3-4 passes for gradient extraction.

GIMP for post processing: Curves. Color noise reduction using HSL Color technique. Star masking, luminance masking. Hue-Saturation.

Final touches using lightroom: Reduce texture, fine hue-saturation on stars and gas.

Still ongoing.

36 hours, just a few mins shy of my current longest project (M101)

Taken with the S24 Ultra phone 5× zoom

At 27 hours across 10 nights, this ongoing project has become the second longest astrophotography project I've had so far (only the pinwheel galaxy is longer at 36 hours).

Equipment: Optolong l-eXtreme filter, MSM Nomad tracker, tripod, S24 Ultra. No telescope.

Settings: 30s iso 3200 wb 5500. ~50-100 darks included for each night

Processing: Siril (Batch stack size ~50-100), Siril (stack daily masters into final master), GraXpert (gradient removal, 2 passes), Siril (Green noise removal), GraXpert (1 more pass), GIMP (curves, star mask, color noise removal using HSL color blending, Hue-saturation)

Will continue to add more data over the season.

Taken by the S22 Ultra while my S24 Ultra is capturing the Cygnus region.

16 hours and going

A (relatively) quick project compared to the Pinwheel galaxy.

Taken in bortle 7-9 sky, S24 Ultra 50MP 5× zoom, MSM Nomad Tracker, Didyclips + Moment Cinebloom 10% filters.

4 nights of iso 800, 30s, 5500k, totaling of 7.75 hours. Darks included for each night.

Three-tier stack in Siril (batch, daily master, final master), GraXpert for gradient removal, noise removal. Siril for green noise removal. GIMP for curves, background desaturation, star saturation. Lightroom for fine tuning.

Starfield is much more dense than expected, given that I once struggled with even the brightest stars at my place.

Bortle 7-9, 7.5 hours, MSM tracker, didyclips + cinebloom 10%

From a suburb. The bright star is Vega.

My sky is often deemed as bortle 7-9 and is highly asymmetrical so I'll take the average. Second pic is single exposure (ISS photobomb) with didymium filter on.

Sky: Bortle 8-9/17.8 SQM

Equipment: S24 Ultra 50MP 5× zoom, MSM Nomad tracker, Didyclips broadband filter

Acquisition: \\\~32 hours across 8 nights. Darks and Bias included (Though the Bias didn't have much of an effect)

Stacking: batch size \\\~50-100 (Tier 1), stack Tier 1 batches for single night (Tier 2), stack multiple nights (Tier 3). Siril sigma rejection.

Post-Processing: Siril for green noise removal, GraXpert for gradient correction and denoising, GIMP for stretch,, color noise reduction, star masking and hue adjustments. Light room to fine tune noise and hues, increase contrast.

Sky: Bortle 8-9/17.8 SQM

Equipment: S24 Ultra (phone) 50MP 5× zoom, MSM Nomad tracker, Didyclips broadband filter

Acquisition: \~32 hours across 8 nights. Darks and Bias included (Though the Bias didn't have much of an effect)

Stacking: batch size \~50-100 (Tier 1), stack Tier 1 batches for single night (Tier 2), stack multiple nights (Tier 3). Siril sigma rejection.

Post-Processing: Siril for green noise removal, GraXpert for gradient correction and denoising, GIMP for stretch,, color noise reduction, star masking and hue adjustments. Light room to fine tune noise and hues, increase contrast.

S24 Ultra under a near-city night sky.

Pinwheel galaxy is a little to the top and right of the center of the image. S24 Ultra Iso 800 30s 5× zoom single frame.