M81

Discussion in 'My Astrophotos' started by Tim Povlick, Apr 4, 2021.

  1. Tim Povlick

    Tim Povlick Cyanogen Customer

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    Location:
    Kayenta Utah, USA
    M81 in monochrome using a combo of 60 second and 90 second exposures, unguided.

    telescope: AP-160
    mount: AP-900
    camera: STC-7

    _..--
    TiM
     

    Attached Files:

  2. Doug

    Doug Staff Member

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    Very nice!
     
  3. Tim Povlick

    Tim Povlick Cyanogen Customer

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    Thanks Doug...

    I noticed there are some black pixels scattered about.
    These are not in the raw frames; appears to be due to the processing.

    _..--
    Tim
     
  4. Doug

    Doug Staff Member

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    Not sure what would cause that... maybe you should redo the processing.
     
  5. Tim Povlick

    Tim Povlick Cyanogen Customer

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    Did to much IP on the image and not sure what caused it. Sure miss the days of Tech Pan and D19 developer!

    Here is the image set of 1 minutes exposures stack of 30, unguided STC-7
     

    Attached Files:

  6. Doug

    Doug Staff Member

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    Nice detail! You must have better seeing than I do. Where is your observing site?
     
  7. Tim Povlick

    Tim Povlick Cyanogen Customer

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    TU..
    I am in SW Utah at 1000 meters. The seeing can be good when the desert winds calm down.
     
  8. Doug

    Doug Staff Member

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    Definitely better seeing than I'll ever get. On my best-ever night here it got down to 1.8 arc-seconds... but the best conditions only lasted an hour. 2.5 is a good night. 3 is not unusual. I've seen 15. That is not a typo.
     
  9. Tim Povlick

    Tim Povlick Cyanogen Customer

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    Location:
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    Unfortunate the seeing isn't better there. I was in north of San Diego with 1,000 acres of vacant land on all sides. The light pollution wasn't to bad. The seeing was incredible as Ocean Pacifica was about 2 or 3 miles away and the airflow on the surface was laminar. Not sure what the arc-second seeing was but it was outstanding. I am sure I caught a glimpse of the Enke Division.

    Will have to measure the seeing here.

    Tim
     

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