Helen Little

First go at the Cygnus Wall in the North America nebula - just 80 mins (20sec subs in EQ mode) with an almost full moon!
Struggling to really bring out the blues, so will have another go at the processing, and maybe more time on it will help too.
#SeestarS50 #Astrophotography

IC410, the Tadpoles nebula, captured over several nights with my #SeeStarS50. Such a cool target! Had to darken the corners in Photoshop due to extreme noise from field rotation.
1343x10sec subs
#Astrophotography

M101, the Pinwheel spiral galaxy, in Ursa Major. 3 hours 20 mins of integration time. Colours are 'real' but have been enhanced by increasing the saturation.

M101, the Pinwheel Galaxy, in Ursa Major. Imaged over two nights with my #SeeStarS50, for a total of 1190x10sec subs (3.3 hours integration). Stacked in Siril, processed in GraXpert and Siril. May add more data to this once I get EQ mode up and running!
#Astrophotography

I was just thinking yesterday how cool it would be to combine data from lots of seestars - could be a big community project!

Great job Elliot - glad the tip was useful! 😃 Know what you mean about lack of clear nights - keeping everything crossed for at least a few more in the coming weeks! 🤞

The Soul Nebula, IC1848, captured by the SeeStarS50 in 'mosaic' mode over multiple nights. Processed in Siril, GraXpert and Photoshop.

Soul Nebula, IC1848. Mosaic subs from multiple nights restacked in the #SeestarS50.
1644x10sec subs (4.5 hours integration time), but I reckon that was at least 10 hours 'elapsed' time due to a high rejection rate. Still want to get more time on this to reduce the noise.

#Astrophotography

NGC 281, Pacman Nebula. 717x10sec subs, from three nights. Stacked in Siril, stars removed Denoising and deconvolution in GraXpert Histogram stretching, colour calibration and stars recombined in Siril.

More re-processing, this time going back to one of the first targets I tried, way back in Dec/Jan 😄
NGC 281, Pacman Nebula. 717x10sec subs, from three nights.
Processing in Siril and GraXpert.
Still blown away by what this little gadget can achieve!
#SeeStarS50 #Astrophotography

Unfortunately I don't have Pixinsight (can't quite justify the cost - yet!) but that sounds exactly like the new feature that's coming in Siril 1.4. Can't wait!

Thanks Elliot! Yes, it's a mosaic 🙂 Here's what it looks like after using 'Deep Sky Stack' in the SeeStar (about 460x10sec subs):

There seems to be more detail in the one on the right, but I don't think that would be obvious on a small screen.

Another interesting comparison, but perhaps not very 'fair' as they're not processed exactly the same way. Left: a crop of the first image in this thread (seestar stack). Right: Siril stack of the same subs. Both denoise/deconvolution in Graxpert, further stretching, colour calibration etc in Siril.

Yes, it is possible, but at the moment (v1.2.6) Siril can't re-create a large mosaic if the subs at the edges don't overlap much with the reference image. So I can get a stack of the central part, but not the 'double width' of the x2 mosaic. Sorry, I'm not explaining that very well!

Left: Manual stack of 304 lights using Siril (cropped, 100% zoom) Right: SeeStar stack of 459 lights (cropped, 100% zoom) Both with green noise removed, Autostretch The set of lights was the same for both, but fewer subs were stacked in Siril due to not being able to register all the subs at the edges of the mosaic.

Thank you Matthias! The Seestar certainly does a good job, and at the moment it's the only way I've found to restack all the mosaic files from several sessions. I think when Siril 1.4 is released that will be even better though. Here's a manual Siril stack (left) compared to the Seestar (right):

Thanks Darren! 😃

Rosette nebula captured with the SeeStarS50.

As the weather's gone from cold and grey, to cold, grey, wet and windy, it was time for another re-processing session!
Here's the Rosette nebula from a few separate sessions (done by copying the files back to the #SeeStarS50 to restack).
Siril, Graxpert, Photoshop
453x10sec subs
#Astrophotography

Oh yeah - never noticed that before! 😃

M42, the Great Orion Nebula, and Sh 2-279, the Running Man nebula, taken with the SeeStarS50.

My best effort at M42 so far - now up to a total of 462 individual subs 're-mosaiced' by the #SeestarS50, then the usual processing in Graxpert and Siril. Also some editing in Photoshop to hide some mosaic artefacts (due to imaging on multiple nights with inconsistent conditions). #Astrophotography

M51, the Whirlpool galaxy. Captured with my SeeStarS50

M51, the Whirlpool galaxy. This was my favourite galaxy when I was young, so I'm really chuffed to get this so many years later!
About 50mins of integration time (288x10sec subs from #SeeStarS50), processed in Graxpert and Siril.
#Astrophotography

Wowza! 😍

Processing details:
Siril: Stacked, stars removed with Starnet
Graxpert: Background extraction, denoised, nebula deconvolution
Siril: Stretched, colour calibration, saturation, stars recombined
Photoshop: Cosmetic 'fiddling' to remove artefacts around one of the stars, contrast tweaked with curves

M45 Pleiades. 1 hour exposure time, stacked in Siril from subs captured on two different nights. I excluded subs from another night when it was a bit misty, as that was causing some 'fake' nebulosity!
#SeeStarS50 #Astrophotography #Pleiades

AstroSidivis's Darkroom Welcome to my YouTube channel! I am an American astrophotographer living in West Yorkshire. I've been taking photos of the night sky and deep space objects for about 2 years. This space is dedicated t...

The past 2 days I've been diligently working on creating an AP processing centric YouTube channel. I hope that you help me in launching my first channel. Please like, comment and subscribe! I look forward to sharing and growing this community with you. #astrophotography

youtube.com/@astrosidivi...

Flaming Star nebula, IC 405. A swirl of orange nebulosity surrounds a bright star, AE Aurigae.

An early clear spell last night meant I could have a go at the Flaming Star nebula (IC 405) with my #SeeStarS50. 357x10sec subs giving an hour of integration time, captured over the course of a couple of hours. Processed with Siril and Graxpert.
#Astrophotography

You're welcome 🙂

Yes, I just use the sky atlas. For Andromeda I use the framing mode (x2) to get more in. I'm using Siril to stack the individual subs, but I think you can also 'restack' multiple nights-worth in the Seestar app.

Andromeda galaxy M31, and M32. Processed from 544x10sec subs captured with the SeeStar S50.

I've now got around 1500 subs of M31. Siril managed to register about 800 of those (with sufficient overlap of the ref frame) and then after I manually rejected a lot of poor quality subs, it stacked 544. Think this is the best result so far.
#SeeStarS50 #Astrophotography

I haven't painted for a while, but this is one of my favourites - hope it counts as pretty! Woods near where I live.

Or maybe just 'user error'. Had another go with the Seestar's mosaic .fit file - did better with the colour calibration. 35 mins integration time. Processing in Siril (star removal), Graxpert (denoised the starless image), Siril (stretched, recombined stars) and Photoshop (corners darkened).

Rosette nebula from the SeeStar S50. 210x10 sec subs, using mosaic mode.

This is an attempt at processing the full mosaic, as stacked by the Seestar - much harder to get a satisfactory stretch and colours. Maybe because a lot of the subs included by the SeeStar were sub-optimal (thin cloud resulting in no nebulosity visible), degrading the overall SNR. Need clear skies!

YouTube video by Naztronomy How You’ll Be Able to Stack Seestar Mosaics with Siril

Looking forward to Siril 1.4 being released, as it looks like stacking from mosaic subs will be much easier with that, using astrometric image registration. youtu.be/np9Ld4oA1S0?...