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Posts posted by pietervdv

  1. Hi all,

    Last week I've put together some of my data made the last couple of months to compose this bi-colour image of M27. Quite tricky to proces due to the high dynamic range of the object, quite a pain to tease out the faint outer details without making the image look to forced. I started the processing job from scratch a couple of times, but settled with this version for now. The h-alpha data was acquired from my heavily light polluted backyard, the o3 data I acquired during an astro holiday in Southern France (Provence) under pitch black skies late August.

    Thanks for checking them out.




    Some details of my gear:

    Scope: 10" f/3.8 homebuilt Astrograph with 3" Wynne corrector

    CMOS: ASI-1600 MM Cool (-10°C)

    Filter: Astrodon 5nm h-alpha / Baader 4,5nm o3

    Exposure: 24 hours in 5min subframes (15 hrs h-alpha / 9 hours o3)

    Mount: Mesu200



    • Like 40
  2. On 10/06/2020 at 09:44, Knight of Clear Skies said:

    Taking another look at this one, I haven't seen an image I've liked more for some time. I wonder if there is any OIII signal in the area? It might shed some light on the nature of the ring.

    Indeed, you read my mind. The region next to this was imaged by Lorenzo Comolli and there are extremely faint traces O3 present in the whole area.


    He focused on the G82.2+5.3 supernova remnant in DWB145  just besides my frame.

    I suspect there is something very interesting to see in O3 in the bottom left part of my picture. Something to try my 4.5nm O3 baader filter on.😉


    • Like 1
  3. 11 hours ago, ollypenrice said:

    Fabulous image, Pieter. Astrophotography at its best.

    Sorry about the accident!


    Thanks. You are forgiven. 😉 That does not go for the senior citizen who ran me off the road. 

    • Like 1
  4. 30 minutes ago, Knight of Clear Skies said:

    Very nice, that inclined ring structure is striking, as are those streaks at upper right. Thanks for showing us something new, these filaments in Cygnus are often overlooked in favour of the more famous objects. I can only assume they are the result of multiple supernovae and stellar winds from massive stars.

    If anyone is wondering where this is, I found DWB145 on Aladin (you may need to zoom out quite a bit). I'm not quite sure where LeDu2 is in relation to it though. @pietervdv, can you help us please?

    The discoverer of the Squid Nebula in Sh2-129 if I'm remembering correctly.

    Thank you!

    LeDu2 is right here; it is not very obvious in Aladin, this is the outline of my image.





    • Like 1
  5. Hello all,

    Finally found some time to make another astrophoto (was 5 months ago...). I sustained a pretty bad cycling accident in February and was only able to carry my equipment outside again about 3 weeks ago. Great to be able to make an image again.

    This one was on my bucket list for several years and I have spent 20 hours on it the last couple of days. It's a 2 panel mosaic of a very faint and rarely imaged patch of nebulosity next to DWB145 in Cygnus. Thanks to Nicolas Outters for the inspiration!


    Scope: 10" f/3.8 homebuilt Astrograph with 3" Wynne corrector

    CMOS: ASI-1600 MM Cool (-15°C)

    Filter: Astrodon 5nm h-alpha

    Exposure: 20 hours in 5min subframes (2 panel mosaic)

    Mount: Mesu200


    Thanks for checking it out,


    LeDu2 small.jpg

    • Like 16
  6. If you pan around in the Simbad sky survey catalogue around Eta Carina, should not be so hard to find I reckon? Can't help you with the exact coordinates. To be honest, I was never a fan of this Hubble picture. To my feel it is overprocessed. Looks like to much deconvolution was done on the nebula. Maybe it's just me... 😉

  7. Hi all,

    Making a deep Abell1656 has been on my bucket list for some years; and now I finally made an attempt at it. I escaped the fuss of Christmas and New Year's celebrations to enjoy a great week in Southern France Provence for imaging. The weather was great with 4 out of 6 crystal clear 12 hour long nights. This is the first result; a long haul in Luminance on this impressive Galaxy Cluster. I did not bother with colour as I feel it does not add much. 


    Equipment: Homebuilt 10" f/3.8 Astrograph with Wynne corrector on a Mesu200 mount

    Sensor: ASI-1600MM-Cool cmos -20°C

    Exposure: 10 hrs (5 min subs)

    Filter: Baader Luminance

    Capture and Calibration: Sequence Generator Pro and Astro Pixel Processor


    Thanks for checking it out,



    abell 1656.jpg

    • Like 16
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