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Contains:  IC 4605, NGC 6144, rho Oph nebula, IC 4604, IC 4603, M 4, NGC 6121, M 80, NGC 6093, The star τSco, The star 22Sco, The star Antares (αSco), The star ρOph, The star Al Niyat (σSco), The star οSco, Part of the constellation Scorpius (Sco)

Image of the day 06/01/2018

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    The Scorpius-Ophiuchus Region, 


            Wei-Hao Wang
    The Scorpius-Ophiuchus Region

    The Scorpius-Ophiuchus Region

    Technical card

    Imaging telescope or lens:Takahashi TOA 150

    Imaging camera:Pentax 645z Mod

    Mount:Takahashi EM-400 Temma2

    Guiding telescope or lens:SharpStar 50 ED

    Guiding camera:ZWO ASI290MM Mini

    Focal reducer:Takahashi TOA 67 Flattener

    Software:PixInsightAuriga Imaging RegiStarPhotoshop CC

    Resolution: 5650x7560

    Dates:May 13, 2018May 14, 2018

    Frames: 48x480" ISO800

    Integration: 6.4 hours

    Avg. Moon age: 27.90 days

    Avg. Moon phase: 3.28%

    Bortle Dark-Sky Scale: 2.00 job: 2065105

    RA center: 246.915 degrees

    DEC center: -25.719 degrees

    Pixel scale: 4.009 arcsec/pixel

    Orientation: 0.108 degrees

    Field radius: 5.255 degrees

    Locations: Mt. Shiao-Shuei (Taiwan), Taichung, Taiwan

    Data source: Traveller


    This is a 16-frame mosaic. This time, I decided to go relative narrow-field with high resolution. The consequence is it is not very deep.

    The original mosaic has 683 Mega pixel, and it's not practical to upload such a large image. The version uploaded here is a 25% reduction.

    Astrobin seems to have some problem displaying images at this moment. If you have trouble seeing this image, you can go to my Flickr page:
    Large file:



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

    Sky plot

    Sky plot


    The Scorpius-Ophiuchus Region, 


            Wei-Hao Wang