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Contains:  IC 4601, IC 4592, The star χOph, The star ψOph, The star νSco, The star ω2Sco, The star ω1Sco, The star β2Sco, The star Graffias (β1Sco)

Image of the day 08/06/2018

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    The Blue Horse Head, 


            Wei-Hao Wang
    The Blue Horse Head

    The Blue Horse Head

    Technical card

    Imaging telescope or lens:Takahashi Epsilon 180ED

    Imaging camera:Nikon D800 Mod

    Mount:iOptron CEM60-EC

    Guiding telescope or lens:SharpStar 50 ED

    Guiding camera:ZWO ASI290MM Mini

    Software:PixInsightAuriga Imaging RegiStarPhotoshop CC

    Resolution: 6000x4182

    Dates:Sept. 14, 2015June 11, 2018

    Frames: 80x180" ISO800

    Integration: 4.0 hours

    Avg. Moon age: 13.99 days

    Avg. Moon phase: 4.48%

    Bortle Dark-Sky Scale: 1.00 job: 2176334

    RA center: 244.108 degrees

    DEC center: -19.694 degrees

    Pixel scale: 3.806 arcsec/pixel

    Orientation: 179.992 degrees

    Field radius: 3.866 degrees

    Locations: Maunakea Visitor Information Station, Hilo, Hawaii, United States

    Data source: Traveller


    This is a single-shot/mosaic hybrid. In June 2018, I took 2 hr of exposure centered at the blue horse head. Then I mixed the data with old data taken in 2015, to deepen the main target and slightly expand the field of view.

    As a result, the field of view is slightly larger than a single shot using this camera/scope combination. The main target receives about 4 hour of exposure, and the outer region in this image receives somewhere between 1 hr and 2 hr of exposure.



    Wei-Hao Wang
    License: None (All rights reserved)

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    Sky plot


    The Blue Horse Head, 


            Wei-Hao Wang