Hemisphere:  Southern  ·  Constellation: Corona Australis (CrA)  ·  Contains:  NGC 6723  ·  Part of the constellation Corona Austrina (CrA)  ·  The star αCrA  ·  The star βCrA  ·  The star γCrA  ·  The star εCrA

Image of the day 06/29/2018

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    Corona Australis Dust Cloud, 


            Wei-Hao Wang
    Corona Australis Dust Cloud
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    Corona Australis Dust Cloud

    Technical card

    Imaging telescopes or lenses: Takahashi Epsilon 180ED

    Imaging cameras: Nikon D800 Mod

    Mounts: iOptron CEM60-EC

    Guiding telescopes or lenses: SharpStar 50 ED

    Guiding cameras: ZWO ASI290MM Mini

    Software: PixInsight  ·  RegiStar  ·  Photoshop CC

    Dates:June 9, 2018June 11, 2018June 13, 2018June 14, 2018June 15, 2018

    Frames: 142x180" ISO800

    Integration: 7.1 hours

    Avg. Moon age: 16.71 days

    Avg. Moon phase: 7.20%

    Bortle Dark-Sky Scale: 2.00

    Basic astrometry details

    Astrometry.net job: 3255337

    RA center: 19h 12' 12"

    DEC center: -37° 35' 45"

    Pixel scale: 3.458 arcsec/pixel

    Orientation: 358.643 degrees

    Field radius: 4.140 degrees

    Resolution: 7560x4140

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

    Data source: Traveller


    This is a three frame mosaic.

    Ver.A is the original 3-frame mosaic made with TAK Epsilon 180ED.

    Ver.B is a wide-field image taken with Sigma APO 180mm/F2.8. It serves as the registration reference for the mosaic, as well as background reference for removing the background sky gradient in each mosaic panel.

    Ver.C (Final) incorporates this older image of mine:
    This helps to enhance the S/N and resolution in the R-CrA/NGC6723 region.

    Just for fun, this is the link to the film images for this region I made some twenty years ago:



      Corona Australis Dust Cloud, 


            Wei-Hao Wang
      Corona Australis Dust Cloud, 


            Wei-Hao Wang
    • Final
      Corona Australis Dust Cloud, 


            Wei-Hao Wang

    Sky plot

    Sky plot


    Corona Australis Dust Cloud, 


            Wei-Hao Wang

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