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Thread: M 82 h-alpha filaments

  1. #1
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    M 82 h-alpha filaments

    Hello folks,
    has anybody of you seen this feature in any kind of observing technique or at least heard about?

    CS
    Norman
    12" f/ 4,5 - tuned Sumerian Optics Dobson - Nauris main mirror
    - who stands the rain deserves the sun! -

  2. #2
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    Tried it several times but I only could pick up the very first beginnings from the main body. It looks like a hood and spans around 1'-1.5'. Along the NW side it reaches to a 16mag star. I never saw the single thin filaments.

    M82.jpg

    Did you try it with H-alpha equipped NV during the HTT meeting?
    Last edited by Uwe Glahn; September 9th, 2024 at 07:19 PM. Reason: add a sketch
    Clear Skies, uwe
    http://www.deepsky-visuell.de
    Germany

    27" f/4,2

  3. #3
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    Yes i/we did - with 33". In a position angle of around 100-110 degrees a little short cone reached out of the middle of M82 (down left quadrant in your sketch).
    I´ve been the only one of 4 observers to detect that, so no confirmation.
    All in all it sounds very similar to your observation without that electronic aid. No fine filaments have been visible.

    conditions that night by SQM: 21.3

    CS
    Norman
    Last edited by Norman; September 10th, 2024 at 09:54 AM.
    12" f/ 4,5 - tuned Sumerian Optics Dobson - Nauris main mirror
    - who stands the rain deserves the sun! -

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