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Goofi's Imaging Challenge, October 2020 - M33

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#1 nmoushon


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Posted 01 October 2020 - 06:59 PM

The October 2020 Challenge is now open. The target is M33 The Triangulum Galaxy. To reduce the number of stickies, please submit your entry to this thread.


For those having troubles locating the target here is a post that will help locate near by objects.


The Rules will remain pretty simple:


      Your Equipment

      Your Data, Captured This Season

      Your Processing

      One Entry Per Member

      Only post your FINAL image


To increase participation over such a diverse group, the winner will be selected by random drawing. Please feel free to start a thread requesting guidance on your entry prior to submitting it, the whole purpose of this challenge is to learn and compare on a common target. Entries must be submitted by midnight eastern time on October 31, and I will try to announce the winner sometime on November 1.


Note: If I am late announcing, gently nudge one of the moderators in a private note, it helps.


Please display an image in your post, not just a link!!


I hope everyone has fun with this one, and with that,


Let The Games Begin


**Disclaimer** - If the selected winner does not reply and pick a target with-in 3 days of the winner being announced, the Mods will then select the next target.

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#2 elmiko


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Posted 02 October 2020 - 08:31 AM


details and higher resolution at link

Attached Thumbnails

  • M33_AT92_Zwo_UvIr_Lenhance_final_Crop_2.jpg

Edited by elmiko, 02 October 2020 - 08:33 AM.

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#3 ckagy


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Posted 03 October 2020 - 12:31 PM

7.25 hours of data taken in Arlington, VA in mid-Sept using a D750 on an ES AR102 mounted on an AVX. Processed with AstroPixelProcessor and a light touch with Photoshop.





Attached Thumbnails

  • m33_5_nights_arlington_va.jpg

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#4 JOEC.


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Posted 03 October 2020 - 05:37 PM

Ok, so this was taken a bit early, July 19th 2020 so really do not want to go back for it. Although I should, there is not much data on this. This was taken with a 6" Astrograph guided with an Orion guide scope. Main camera is a QHY168C and the guide camera is a QHY5III224C run by APT and PHD2. It is 25 frames of 120S stacked and processed in APP and PSE20 with Topaz Tools. 




Attached Thumbnails

  • TRI-FOR-WEB.jpg

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#5 rekokich



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Posted 04 October 2020 - 01:32 PM

Image details:
TSAPO100Q (100 x 580 mm)
iEQ30pro mount, Orion 60mm f/4 SSAGpro autoguider
Canon 600D camera, Astronomik CLS-CCD filter
24 x 240 sec subs (2 discarded), iso 800, 30 darks, 30 bias
Software: PHD2, DSS, XnView, StarNet++, StarTools.


Thank you for looking.



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#6 russellmm


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Posted 04 October 2020 - 02:48 PM

Even though I am new to AP, I have had a really hard time with this target. It seems like Light Pollution really makes this one harder because the spirals are so dim?


This is several hours of integration time on a DSLR unmodded taken last month



Attached Thumbnails

  • 2020-10-04 12_39_32-PixInsight.jpg

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#7 const


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Posted 06 October 2020 - 04:50 PM

23×120s + 10×8s. September 20, 2020.

Celestron AVX, Edge HD 8", .7x reducer, OAG.

ZWO ASI294MC Pro, SX Lodestar X2. Capturing and guiding with Ekos. Processing in PixInsight.




I also tried to capture a 2×2 mosaic of M33 last weekend, mainly to practice with mosaics. Planning and capturing went well, which is good. I have 248 of 2 minute subs. But it was full moon only 30° away of M33. The glow and gradients are so terrible I can't even make a single pane look any good. A cup of good data is better than a huge pile of garbage.

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#8 stobiewankenobi


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Posted 08 October 2020 - 02:10 PM




Imaging telescopes or lenses: Explore Scientific 102 mm f/7 FCD100

Imaging cameras: QHYCCD QHY247C

Mounts: Celestron CGX

Guiding telescopes: Williams Optics Guidestar 61

Guiding cameras: ZWOASI 120 MM Mono

Focal reducers: Stellarvue Field Flattener/Reducer Stellarvue

Software: PixInsight


Frames: 72x300"

Integration: 6.0 hours


This was taken in Joshua tree at an Airbnb that I frequent for imaging!

Attached Thumbnails

  • m33-small.png

Edited by stobiewankenobi, 08 October 2020 - 02:19 PM.

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#9 GoBlue


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Posted 09 October 2020 - 11:27 AM

Taken 10/8.

Started imaging around 9:30. Moon started to rise an hour later but wasn't washing out sky in that area too badly. Kind of a pleasant surprise.

Lost 1.5 hours of images to dew.


35 X 180.

71 X 120.

4 hours 5 minutes total.

ISO 800.

Dithered every three.

Camera sensor temp +15c.



Attached Thumbnails

  • m33.jpg

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#10 astrodd



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Posted 09 October 2020 - 07:50 PM

Taken last night






135 60s subs


PixInsight filenames are _c_cc_d_a_r prior to integration (calibration, cosmetic correction, debayer, subframe selector, registration). Histogram and Curves after.


Triangulum Galaxy

Edited by astrodd, 09 October 2020 - 07:51 PM.

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#11 Gipht



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Posted 10 October 2020 - 10:03 AM

This is a favorite object for many people.  Good Job everyone!  My picture was taken on 10/09/2020 with the ASI071MC and a STV102 at f/7.  36x4' with the camera set to 200 gain and a +5C temperature.  Captured in the new version of Sharpcap, stacked in DSS, and developed in Star Tools and Gimp.





Attached Thumbnails

  • m332020.JPG

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#12 johnsoda


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Posted 10 October 2020 - 03:30 PM

Click on small image for better quality image and acquisition details.





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#13 rupeshjoy143


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Posted 11 October 2020 - 07:18 PM

This was a fun target to capture. I took this target at Cherry Springs State Park, in PA. The night was cold and got down to 29°F. I woke up to frost all around me and a very cold tent. This along with a clear sky was a welcome treat.


Acquisition Data

  • Telescope: Explore Scientific ED127 Air-Spaced Triplet Apochromatic Refractor
  • Camera: ASI2600MC Pro
  • Guide Scope: Orion ST80
  • Guide Camera: ASI290MM Mini. Dithering every image at 1 pixel each time.
  • Mount: iOptron CEM60
  • Software: NINA for image acquisition. PixInsight used for stacking and editing. Imported to Photoshop for final touchup and watermarking.
  • Other Accessories: AstroZap Dew Heater, Starizona ApexED 0.65 Focal Reducer/Field Flattener, MoonLite CFL 2.5" Focuser, High Res Stepper Motor, V3 Controller, Pegasus Astro Power Box Advance
  • Filters: Optolong L-Pro 2"
  • Exposure Time: 5 hour 50 minutes (70 x 300 seconds) -20°C.
  • Exposure Start: 22:41
  • Date: Sept 19, 2020
  • Location: Cherry Springs State Park, PA, United States


Processing Info

I took 72 frames at 300 seconds each. I had to throw away about two frames. Otherwise, I could have had a full 6-hour image. I stacked the 70 light frames along with 50 dark and 50 flat frames in PixInsight

Earlier in the night, I was having issues plate-solving due to a simple error on my end which took me two hours to resolve. I could have had a much longer image if I hadn’t run into any issues. As they say, astrophotography is a learning experience every time you set up and get started.

The following processes were performed in PixInsight:

  • Dynamic Crop
  • Dynamic Background Extraction
  • Background Neutralization
  • Color Calibration
  • Photometric Color Calibration
  • MultiScale Linear Transform
  • Histogram Transformation
  • LRGBCombination
  • Curves Transformation (X2 with a range mask. Inverted mask for the background and then non inverted for the target)
  • Color Saturation
  • Curves Transformation (X2 with a second range mask. Inverted mask for the background and then non inverted for the target)
  • Morphological Transformation (Generated StarMask using default settings)
  • Local Histogram Equalization (Performed with a range mask)

Here is a link for the full resolution image and more details

Attached Thumbnails

  • m33.png

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#14 jewelsdean



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Posted 11 October 2020 - 11:08 PM

Wow there are some really great photos of M33 here.  This is my shameful attempt.  laugh.gif

Altair Starwave 80EDTR, 25, 120 second exposures, ASI 533MC Pro 100 gain, 10 offset

Rasberry Pi, astroberry, ASI EAF, Altair .8x Reducer, optolong L-Pro filter.  Not sure which one I like better so here are both post processed differently.


M 33 RGB session

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#15 Wintermute


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Posted 12 October 2020 - 04:09 PM

Triangulum Galaxy (M33)


The third largest of our local group (after Andromeda and the Milky Way), The Triangulum Galaxy (m33) is a face-on spiral galaxy 50,000 light-years in diameter and 3 million light-years away.

196 x 30", 233 x 60" Celestron 8" RASA, ZWO asi2600mc-pro, Optolong L-Pro Filter
30 x 180" Skywatcher Evostar 150mm APO, Starizona Apex ED Reducer, ZWO asi1600mm-pro, Baader 7nm Ha Filter
ZWO asi290mc in a Skywatcher EvoGuide 50 guiding a Skywatcher EQ8-R Pro.

Captured with NINA, Processed with PixInsight. 

Processing: AutomaticBackgroundExtraction, ColorCalibration, BackgroundNeutralization, EZ Denoise, EZ Soft Stretch, NBRGBCombination, SCNR, LocalHistogramEqualization, CurvesTransformation for contrast and saturation, EZ Star Reduction, DarkStructureEnhance. 

Edited by Wintermute, 12 October 2020 - 04:10 PM.

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#16 larryjh


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Posted 16 October 2020 - 10:13 AM

Here is my entry for this month.  The data was collected on 10/13/2020.
Celestron Omni XLT150
Explore Scientific HR coma reducer
ZWO ASI294MC pro
Image info:
80x30 sec at gain 200, dark and flat applied.  Unguided.
Collected in Sharpcap pro, processed in Siril and Gimp
M33 is roughly in the direction of Baltimore from my location, so I had a pretty bad light pollution gradient to deal with.  I pitched about 20% of the subs due to poor FWHM.  I have a guide scope on order and I'm hoping to improve my FWHM and percent of subs that I keep.  I'm sure it's going to be another learning process.  I'm planning to use my ASI224MC as the guide camera.
Click on the image for a larger size in my gallery (first time I've tried posting this way).
R Pp M33 Triangulum Galaxy stacked gnmax bemanual Cc auto levels Sat guidedsmooth contrast curves


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#17 kwpickett


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Posted 17 October 2020 - 11:22 AM

M33 - Shot on 10/12/2020

Bortle 6/7 back yard



WO Z73

ZWO OAG - 120mini

ASI 1600MM Pro

Orion Atlas EQ-G


45 each R, G, B - 60 sec., G76, O50

12 Ha - 300 sec., G200, O50


Processed in APP and Photoshop

Attached Thumbnails

  • M33 - 10-12-20 v1 CN.jpg

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#18 ImNewHere



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Posted 17 October 2020 - 11:25 AM

Here's my M33 from the night of October 8th taken with a Pentax K1, ES 127 FCD100 CF, ES .7 3" reducer, on an iOptron IEQ45 Pro with guiding via MGEN II and 50mm guidescope. 45x 240s, no calibration files. I didn't have the framing right at all on it, but ohh well, it still fit.



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#19 khursh


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Posted 17 October 2020 - 11:09 PM


Here is my first attempt at m33. I feel like I should add some 'narrowband' with my l-eXtreme filter. I don't know if it would help the HII regions.


Imaging telescopes or lenses: Sky-Watcher Espirit 120 ED Super APO

Imaging cameras: ZWO ASI533MC-PRO ZWO ASI533

Mounts: Astro-Physics 900GTO

Guiding telescopes or lenses: Astromania 50mm Guidescope

Guiding cameras: zwo asi 290 mm

Focal reducers: Explore Scientific 0.7 Reducer/Flattener

Software: Nighttime Imaging ‘N’ Astronomy N.I.N.A.  ·  Pleiades Astrophoto, S.L. PixInsight 1.8  ·  PHD 2

Filters: Astronomik UV-IR block L2


Dates:Oct. 12, 2020

Frames: 120x180"

Integration: 6.0 hours







Dynamic Crop


Photometric color calibration

EZ Denoise

Arcsinh stretch



Edited by khursh, 17 October 2020 - 11:13 PM.

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#20 Boeglewatcher


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Posted 18 October 2020 - 02:37 AM

Here is my M33 taken on Sept15 with WO FLT132/925 and a mod Canon 2000D. 23x3min at ISO400. Darks and flats.

guiding with PHD2 using an ASI120MM mini on a 50mm 180mm Guide scope. Processed in Nebulosity.




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#21 X-Lurker


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Posted 18 October 2020 - 07:17 PM

M33 LHaRGB taken in my backyard Oct. 13th & Oct. 14th 2020


Skywatcher 100Esprit

1600MM Pro 

290Mini W/OAG

EFW 7 position


ASIAir Pro


Ha 30x600's

L 40x300's

RGB 24x300's each channel

Darks Flats DarkFlats

Total integration time: 14hrs 20min





Edited by X-Lurker, 18 October 2020 - 07:17 PM.

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#22 Jmw845



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Posted 18 October 2020 - 09:27 PM

Capture Date: October 15th, 2020

Location: My back yard under Bortle 4 skies 100 miles north of New York City

Mount: Orion Atlas EQ-G

Telescope: 130mm Celestron Reflector

Camera: ZWO ASI224

Guiding: None

Software:  EQ Mod with Cartes du Ciel, ASPS for plate solving, captured with Sharpcap, and processed in Astro Pixel Processor.


263 x 45' Lights, 25 Darks, 200 Bias, and 50 Flats.




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#23 AKHalea



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Posted 20 October 2020 - 01:23 PM

Here is my rendition of M33 


10-18 M33 LPR 120Min STCrLMJ CN.jpg


Capture details;

Date & venue : October 18, 2020; from my backyard in Houston Texas suburbs, 

Mount : iOptron CEM40 with ipolar scope, 

OTA : Stellarvue Access 80mm ED refractor fitted with Stellarvue Field flattener & UV/IR cut filter,

Camera : Ha modded Nikon D5300 camera at ISO 100, f7 and total 2 hour exposure (120x1min),

Subs integrated in APP (Astro Pixel Processor) and post processed in StarTools. 

Guiding - None (Unguided). 


The galaxy came out surprisingly well considering that early subs were taken when the galaxy was only 22 degrees up from eastern horizon. 


Stay safe ...... Anil

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#24 TelescopeGreg



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Posted 20 October 2020 - 02:28 PM

Hi all,


So, much has changed in 2 years since we last did this target.  If I recall, October of 2018 was my first time imaging with a coma corrector (and no Barlow), and one of the first with an autoguider.  Imaging was done with the unmodified Nikon DSLR at max ISO (12,800), mostly to keep the exposures shorter than the errant excursions in tracking, and partly because I was still new at this.  Single night, 40 minutes total integration, first time trying to figure out the calibration file processing.  See https://www.cloudyni...-2#entry8968502


Fast forward 2 years.  New scope, new imaging camera, new guide scope and guide camera, new at-mount computer and all its software.  Same mount (!), but a lot more experience.  This is, however, only the second image with the new camera (ASI2600MC-Pro).  A combination of 3 nights' work, I'm still trying to figure out the best settings (e.g. gain vs exposure) and operating techniques (focus needs a bit of work), but this is at least a local plateau.


Imaged 9/24, 10/11, 10/15, 2020

Telescope:  Stellarvue SVA130EDT (130mm f/7, no reducer or flattener)

Camera:  ASI2600MC-Pro; 2x2 on-camera Bin, -5C temp

Mount:  Celestron AVX

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

53 x 4 minute Lights (3 hrs 32 min total), gain 300, offset 50; few dozen flats, dark-flats, darks, bias

Acquisition software CCDciel, plate solving ASTAP, guiding PHD2, all on Raspberry Pi 4B

Stacked in DSS, processed in StarTools

Attached Thumbnails

  • M33 all data 3hrs 32 min DSS ST New process-d.jpeg

Edited by TelescopeGreg, 20 October 2020 - 03:10 PM.

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#25 Navige


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Posted 20 October 2020 - 06:03 PM

Another monthly challenge and another challenge for me!  I took subs for this target in September and very little of it was useful, due to thin clouds and trees.  I took subs again on October 13 and had to tear down in a hurry due to an incoming storm so I didn’t take any flats and there are quite a few dust specs in the subs that I had to deal with.  Decent data otherwise but I am still learning how to process LRGB and have it look right.  Please PM with any processing suggestions.

Scope: AT72EDII 

Mount: Celestron 6SE wedge and pier mounted

Camera: Altair Hypercam 183M Pro

Filter wheel: Starfield high speed 5x 1.25”

Filters: Starguy LRGB 1.25”

Guide camera/scope: QHY 5LII-C/QHY mini guide scope

Focuser: Rigel N-Step 


Capture Software: CPWI, PHD2, NINA 


Image Info:

60x 60s L subs

30x 60s RGB subs



Stacking: DSS 32bit TIFFs

Processing: PhotoShop 2020 

Attached Thumbnails

  • A3CCCB5B-691D-4938-9EE6-B43D1886C656.jpeg

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