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Goofi's Imaging Challenge, March 2021 - Jellyfish Nebula (IC 443)

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#51 ms6107


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Posted 28 March 2021 - 05:48 AM

Finally clear sky for me!


Captured March 23-24 (Moon was 70% :()


Imaging telescope: Teleskop Service TS 102mm f/5.1 Imaging Star APO Astrograph

Imaging camera: ZWO ASI6200MM Pro -15c gain 100 offset 50

Mount: Celestron AVX


Processing - PixInsight:

  • On each channel

  • EZ Decon

  • EZ Denoise

  • EZ Star reduction

  • EZ Soft stretch

On combined image

  • SCNR

  • Local histogram equalization

  • Curves transform

Lastly I fed final image to the topaz Denoise AI






#52 jtrevino


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Posted 28 March 2021 - 12:18 PM

Below is my entry for the IC443 - Jellyfish Nebula:

Imaged March 27, 2021 under an almost full moon
OTA - Stellarvue 80mm APO 480mm f/6 CF

Orion short tube Field flattener

Optolong L-eNhance filter
Mount - Orion Atlas EQ-G

Imaging Camera - Altair Astro 294C
Guide OTA - Orion Mini 50

Guide camera - Orion StarShoot autoguider


29 Lights 240sec
20 Darks

20 Flats

20Dark Flats
Astrophotography Tool

Skyshed Pod XL5

Processed in MaximDL Pro v5


Had alot of problems imaging this target this month.  The original plan was to image during the new moon at my remote dark site, but the weather did not cooperate.  first light with my new Optolong L-eNhance Narrowband filter. From my Light polluted backyard. 


Edited by jtrevino, 28 March 2021 - 12:19 PM.


#53 Cfreerksen


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Posted 28 March 2021 - 02:12 PM

Late entry from shipping delays. New filters got here yesterday. I was able to get a scant 120 minutes on the Jelly under a 99% moon. No flats or flat darks. I was hoping to get more tonight but the high clouds rolling in.


Chroma 5nm

Ha 3 x 600sec

SII 6 x 600sec

OIII 3 x 600sec

William optics GT102 w/ .72 Flat8 reducer @f5

ASI2600MM -5C



Hope you like it!



Attached Thumbnails

  • IC443RDCed.jpg

Edited by Cfreerksen, 28 March 2021 - 02:13 PM.


#54 Dereksc


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Posted 28 March 2021 - 04:16 PM

Also a late entry - in my case due to overcast skies and then moon issues. I have my imaging rig configured for galaxy season so this is a closer crop than I would normally do due to the longer focal length setup. Also, I only have a 5 position filter wheel so the only narrow band filter I have mounted in my filter wheel is Ha, all other filters are broad band for the galaxies. Hence the HaRGB result.


Imaging telescope: Celestron C9.25 SCT
Imaging camera: ZWO ASI1600MM-C
Mount: Skywatcher EQ6R Pro
Guiding camera: ZWO ASI174 Mini
Focal reducer: Celestron f/6.3 Focal Reducer
Software: Starkeeper Voyager  ·  Pixinsight
Filters: ZWO B 1.25"  ·  ZWO G 1.25"  ·  ZWO R 1.25"  ·  ZWO Hɑ 7nm 1.25"
Accessory: Rigel Systems Focuser n-Step  ·  Orion Thin Off Axis Guider TOAG


Dates:March 12, 2021 ,  March 17, 2021 ,  March 26, 2021 ,  March 27, 2021


ZWO B 1.25": 51x100" (gain: 76.00) -15C bin 1x1
ZWO G 1.25": 60x100" (gain: 76.00) -15C bin 1x1
ZWO Hɑ 7nm 1.25": 112x180" (gain: 200.00) -15C bin 1x1
ZWO R 1.25": 68x100" (gain: 76.00) -15C bin 1x1
Integration: 10.6 hours
Darks: ~20
Flats: ~20
Flat darks: ~20
Avg. Moon age: 14.47 days
Avg. Moon phase: 51.54%
Bortle Dark-Sky Scale: 6.00


Basic astrometry details
RA center: 6h 17' 34"
DEC center: +22° 40' 26"
Pixel scale: 0.593 arcsec/pixel
Orientation: 230.312 degrees
Field radius: 0.448 degrees


Mar 28 2021_IC443_5 1.jpg



Astrobin link (High Resolution) :







#55 benringel22


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Posted 29 March 2021 - 10:55 PM

I just saw this post but am excited to finally participate!


Date taken: 3/4/21
Camera: QHY268C
Telescope: William Optics Spacecat 51
Filter: Optolong L-eXtreme Dual-Bandpass Filter
Total exposure time: 2 hours 32 minutes (8 minute subs x 19)
Calibration frames: 13 darks, 40 bias, 30 flats
f number: f/4.9
Gain: 75
Mount: Orion Atlas EQ-G
Guiding: PHD 2 through 60 mm Orion Guide Scope
Light Pollution: Bortle 6
Edited on: Adobe Photoshop using Starnet++


The Jellyfish Nebula


#56 TelescopeGreg



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Posted 30 March 2021 - 12:36 AM

Hi folks,


So, taking this a bit down to the wire, hoping for more than one night of data.  I finally got that second session last night, which netted some interesting experimental data, along with more on this month's Challenge as well.  What I ended up with is a bit of a "Frankenstein" in its content, due in part to that experiment.  (I guess you mono imagers call this "normal process" smile.gif)


The first night, 4-March, was a "get something in the can" event, just to learn a bit about the target.  I'd never imaged it before, and it's the first of this type with the cooled CMOS camera.  So, no filters, just grab the image.  In that first session I managed 1hr 24 min of 4 minute subs, and got an OK image; nothing great.  After playing with different stacking methods in DSS, I tried stacking the data with ASTAP, and got a significantly better treatment to the background noise.  Unexpected, but welcomed.  Good enough to post, I suppose, if that's all I could get.  Then we got weather, and the Moon and weather together.


Last night the weather cleared, and the Moon was full, but in a different enough part of the sky that I thought it might work.  With the contingency image in hand, let's experiment!  I threw on the Astronomik UHC-2 filter, to see how well it did with the Nebula's structure in the presence of the Moon.  Surprisingly, I didn't have to change the exposure from my "regular" settings.  That probably means something worth understanding, but I haven't had a chance to digest it.


Due to some technical issues (I'm still fighting with the USB 3.0 Hub killing off my imaging camera), I only got 32 minutes with the filter.  Processed alone, they weren't half bad, comparing favorably in some regards to the longer-integration no-filter image.  Taking both sessions into DSS for stacking (it does a good job at organizing multiple sessions), the results were different than the base image; better in some ways but worse in others.  Throwing caution to the wind (er, stars?), I threw everything into ASTAP's stacking page.  All the Lights were lumped together, as were both pairs of Flat / Dark-flat sessions.  No clue what it would do with the motley mix, but somehow the results were better than either single night, and what was done with DSS' carefully organized tabs.  StarTools processing brought out the added deep red that I never got with my old Nikon, likely enhanced by the additional integration time with the UHC filter.  Attached, below.


Final experiments included grabbing about a dozen images binned 1x1 instead of my usual 2x2 in-camera.  After processing (including a software 2x2 bin), the result was about the same as the pre-binned image, confirming that the savings in space, and the shorter download time is a net benefit to binning in the camera.


Finally, this is another it-barely-fit image (only cropped for very slight stacking artifacts), suggesting that my next upgrade (after Galaxy season) should be a reducer / flattener.





IC443, Jellyfish Nebula, Imaged 3-4-2021 and 3-28-2021


Telescope:  Stellarvue SVA130EDT, at its native 130mm f/7

Camera:  ASI2600MC-Pro.  Gain 300, offset 50, cooled to -5C.  In-camera 2x2 binning.

Mount:  Celestron AVX

Guider:  ZWO 60mm f/4.6 scope, ASI174mm Mini camera

At-mount software:  CCDciel, ASTAP, PHD2 on a 4gb Raspberry Pi 4B with Astroberry distro

Lights:  21 x 240 seconds no filter; 8 x 240 seconds with Astronomik UHC-2 (1hr 56min total)

Calibration frames:  20 x Darks, 2 sets of 20 Flats, Dark-Flats; no Bias frames used.

Stacked with ASTAP on Linux PC (not the Raspberry Pi!), processed with StarTools



Attached Thumbnails

  • IC443 2 nights 1hr 56min 2x2 bin ASTAP ST old process-b.jpeg


#57 SEM4557


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Posted 30 March 2021 - 08:48 AM

Here's my very late entry. Still trying to get a handle on PixInsight, another night of post-processing would've been useful.


William Optics FLT-98

SBIG STF-8300m


Atlas EQ-G

H-alpha 14 exposures, 600s each

Oiii 12 exposures, 600s each

Sii, 12 exposures, 600s each

Processed through PixInsight

Attached Thumbnails

  • jelly submission resize.jpg


#58 jonnybravo0311


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Posted 30 March 2021 - 08:49 AM

Here's my very late entry. Still trying to get a handle on PixInsight, another night of post-processing would've been useful.


William Optics FLT-98

SBIG STF-8300m


Atlas EQ-G

H-alpha 14 exposures, 600s each

Oiii 12 exposures, 600s each

Sii, 12 exposures, 600s each

Processed through PixInsight

Hooray, another blue one! :)


#59 Der_Pit



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Posted 30 March 2021 - 08:50 AM

So here's my contribution, the first (and so far only frown.gif ) data with the new 2600MM.  But, as I only had 31mm filters available, I only recorded an MFT-sized center part.  Not too much data either, as the target was already past zenith after dusk, and vanished behind some building early....



ASI2600MM with (new 36mm) EFW and Astronomik DeepSky RGB filters

90s subs, Gain 0, Offset 15, 213 (69/73/71) frames = 5h20m, spread over two nights (March 15/16)

Acquisition KStars/EKOS, Processing IDL/Starnet++/GIMP




#60 SEM4557


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Posted 30 March 2021 - 11:58 AM

Hooray, another blue one! smile.gif


Totally, that deep blue somehow pops off the background!  I'm gonna do a purplish-pinkish one eventually, one that looks like a real jelly in the sky!


#61 bakernyc


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Posted 30 March 2021 - 03:43 PM

110x60" subs on Meade 6000 80mm apo with Canon Ra. Stacked and processed in pixinsight and Gimp. Going out tonight to get another couple hours! What a cool target. Wish I could fit monkey head in there.

Attached Thumbnails

  • Untitled.jpg

Edited by bakernyc, 30 March 2021 - 03:50 PM.


#62 Mike in Rancho

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Posted 31 March 2021 - 01:16 AM

Adding to the flurry of late entries...


I wasn't sure I'd be able to enter much of anything this time.  When all I had after the first night was a somewhat red banana shape, I had nightmares of NGC1499 again. shocked.gif    Weather was also a real pill.  If it wasn't cloudy, it was outright raining from cold, late winter storms.  Or 50mph Santa Ana winds.  By the time that all started clearing up, the moon was coming back.  And has it been mentioned we picked a target that is setting in the trees shortly after sunset?  Yes.  I think it has.  crazy.gif 


But nonetheless it was still a good month, particularly with hardware.  My lens cell modification is producing vastly improved star halos.  My (v 2.0) DIY rigged-up guidescope and guiding camera with PHD2 on a resurrected laptop actually seems to be working, and this target is 100% guided - my first ever experience with that.  Finally I souped up my main laptop, and stuffed SSD's into all my computers.  Stacking and processing is a whole lot faster now.  laugh.gif   Oh, and I bought a filter too.


SW Evostar 100ED, Orion 0.8x FR, on belted HEQ5 Pro with Synscan Wifi

DIY guidescope with MS Lifecam, PHD2 via wifi

Nikon D5300, Backyard Nikon, Nikon Ring Remover 3.0, Startools 1.7

82 x 120s on March 15, 17, and 18 = 2 hr 44 min

27 x 300s on March 26 and 27 = 2 hr 15 min with L-eNhance filter

Total = 5 hr 59 min


I could have obtained more time with the filter the past couple nights as it has been clear.  I needed more time.  But the month was running short and I had to figure out how to composite it all together.  The end result is a bit on the clumpy side, usually a strong indication I don't have enough integration.  Still, as proof of concept I'm good with it, and was quite pleased to see the shape of the Jellyfish start to show up, in less time than I had on target unfiltered, and under a full moon to boot.


For this one, unfiltered and filtered data were fully processed separately, the filtered being only the extracted red channel, then layer blended with a mask plus an inverse mask on the stars so that they did not have their color balance upset.  I'll have to practice this and the other ways of extracting and compositing duo band data.




#63 Hermit


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Posted 01 April 2021 - 01:18 AM

Ok, first astrophoto in 10 years or so . . . wow, a lot has changed!
Location: Northern California Sierra foothills, 3700 feet elevation

Scope: Astrophysics 130 EDFGT f/6.3
Mount: Takahashi EM200
Camera: Canon XSi/450D with IR/UV glass and CO2 cooling 1degC
Camera controller: BackyardEOS

Integration: 600sec x 14, ISO 1600, no calibration frames.
Filter: Astronomics CLS-CCD
Guide: SSAG, PHD, modified 10x50 finder
Process: PixInsight


Not sure what those black blotches are about, they moved around.  I heard a bug buzzing around, and it may have been hanging around on the objective! Click on the image for a 25% resize of the original.


Jellyfish Nebula R Crockett 25pct

Edited by Hermit, 01 April 2021 - 01:24 AM.


#64 nmoushon


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Posted 01 April 2021 - 10:02 AM

This months winner is jssimon, post #49.


Thank you to everyone who participated. There were a lot on entries this month! I take it no one spent their stimulus checks on telescope stuff since apparently the clouds stayed away for a lot of you lol.gif


#65 nmoushon


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Posted 02 April 2021 - 10:28 AM

New challenge is up. Thanks again for all who participated. This was a funny month with so many great images to look through. 


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