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Contains:  IC 4592, IC 4604, IC 4605, M 4, NGC 6121, Part of the constellation Libra (Lib), Part of the constellation Scorpius (Sco), The star Al Niyat (σSco), The star Antares (αSco), The star Dschubba (δSco), The star Graffias (β1Sco), The star γLib, The star πSco, The star ρSco, The star τLib, The star τSco, The star υLib, rho Oph nebula

Image of the day 09/14/2015

Getting plate-solving status, please wait...
    Sco-Oph-Lib region, 



    
        

            Wei-Hao Wang
    Sco-Oph-Lib region
    Powered byPixInsight

    Sco-Oph-Lib region

    Technical card

    Imaging telescopes or lenses:Sigma 180mm/F2.8 APO

    Imaging cameras:Nikon D800 Mod

    Mounts:iOptron CEM60-EC

    Guiding telescopes or lenses:SharpStar 50 ED

    Guiding cameras:Fishcamp Starfish

    Software:RegiStarPhotoshop CCPixInsight


    Dates:April 17, 2015Aug. 9, 2015

    Frames: 476x180" ISO800

    Integration: 23.8 hours

    Avg. Moon age: 26.34 days

    Avg. Moon phase: 13.63%


    Basic astrometry details

    Astrometry.net job: 3269696

    RA center: 16h 14' 44"

    DEC center: -23° 49' 30"

    Pixel scale: 10.140 arcsec/pixel

    Orientation: 358.539 degrees

    Field radius: 15.407 degrees


    Resolution: 8800x6500

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

    Data source: Traveller

    Description

    This is a mosaic of 28 panels taken with a 180mm lens, over 10 nights between April and August 2015. The lens aperture is wide-open. There are large overlaps between the 28 mosaic panels, so the final FOV of this image is probably only slightly larger than a 2x2 mosaic making with a 180mm lens. The total exposure of the 28 panels is about 24 hr.

    This image taken at 180mm was used as a reference to model the background in the mosaic panels of this 500mm one:
    https://www.astrobin.com/407984/0/?nc=all
    Without this 180mm mosaic, the 500mm one was not possible.

    For fun, I also uploaded a version with no stars (Rev. H) created with starnet++. You can better see the nebulas in this version.

    Rev. I is a reprocessing in 2020, with nebulas enhanced using the starless version.

    The original image has more than 200 mega pixels. The versions uploaded here are 50% reductions.

    Enjoy.

    Comments

    Author

    whwang
    Wei-Hao Wang
    License: None (All rights reserved)
    439886
    Like

    Revisions

      Sco-Oph-Lib region, 



    
        

            Wei-Hao Wang
      Original
      Sco-Oph-Lib region, 



    
        

            Wei-Hao Wang
      H
    • Final
      Sco-Oph-Lib region, 



    
        

            Wei-Hao Wang
      I

    Sky plot

    Sky plot

    Histogram

    Sco-Oph-Lib region, 



    
        

            Wei-Hao Wang