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Image of the day 06/11/2020

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    Jacoby 1 (PK085+52.1), 



    
        

            Chris Sullivan
    Jacoby 1 (PK085+52.1)
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    Jacoby 1 (PK085+52.1)

    Technical card


    Frames:
    Blue: 245x60"
    Green: 24x150"
    Astrodon Ha 1.25 5nm: 49x1800"
    Astrodon OIII 3 nm: 58x1800"
    Chroma OIII 3nm: 180x600"
    Red: 155x60"

    Integration: 91.2 hours


    Basic astrometry details

    Astrometry.net job: 3601413

    RA center: 15h 21' 49"

    DEC center: +52° 22' 1"

    Pixel scale: 0.913 arcsec/pixel

    Orientation: 89.936 degrees

    Field radius: 0.691 degrees


    Resolution: 4409x3202

    Locations: Home Roof (Bortle 7-8 / Est. Sky Quality: 18.53), Springfield, PA, United States; Stanford Faculty Observatory, Stanford, California, United States

    Data source: Mix of multiple source

    Description

    This is a collaboration with Jerome Yesavage, to whom I must apologize because I badly screwed up my acquisition and foiled our original plans of creating one of the best images of Jacoby1 out there. Unfortunately, my flockboard had shifted at some point during capture and covered part of my focuser, leading to all sorts of calibration problems and subpar data. Pro tip: Don't block the light you're trying to capture. This is partly why I sat on these data for nearly a year (sorry, bud!).

    Luckily for you, Mark Stiles (who helped me out with this one) did in fact publish the best image of Jacoby 1 to date yesterday, so please head over to his page to view a superior image of this target. The detail Mark achieved inside the ring of the nebula is simply astounding!

    This is a super faint target. The Ha, in particular, is extraordinarily faint - approx. 7.5 hours of 10 minute subs at medium-high gain revealed literally nothing, which is why all Ha data are from Jerry (and how he got involved in the first place) and why all my Ha data were trashed. All data on my end were collected between March 2, 2019 and July 1, 2019. I contributed 30 hours of OIII and the RGB and Jerry contributed 53.5 hours of Ha and OIII.

    Comments

    Author

    Chris-PA
    Chris Sullivan
    License: None (All rights reserved)
    142137
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    Jacoby 1 (PK085+52.1), 



    
        

            Chris Sullivan