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Contains:  Sunflower galaxy, M 63, NGC 5055

Image of the day 06/12/2019

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    Messier 63 The Sunflower Galaxy, 





    
        

            Barry Wilson
    Messier 63 The Sunflower Galaxy

    Messier 63 The Sunflower Galaxy

    Technical card

    Resolution: 2514x2974

    Dates:June 2, 2019

    Frames:
    Astrodon E-Series Blue filter: 24x600" bin 1x1
    Astrodon E-Series Green filter: 24x600" bin 1x1
    Astrodon E-Series Red filter: 24x600" bin 1x1
    Astrodon Ha 3nm: 29x1200" bin 1x1
    Astrodon Luminance E-Series: 24x1200" bin 1x1
    Astrodon Luminance E-Series: 51x600" bin 1x1

    Integration: 38.2 hours

    Avg. Moon age: 28.56 days

    Avg. Moon phase: 1.05%

    Astrometry.net job: 2728562

    RA center: 198.957 degrees

    DEC center: 42.039 degrees

    Pixel scale: 0.744 arcsec/pixel

    Orientation: 359.720 degrees

    Field radius: 0.402 degrees

    Locations: Entre Encinas y Estrellas E-EyE, Fregenal de la Sierra, Extremadura, Spain

    Data source: Own remote observatory

    Remote source: e-EyE Extremadura

    Description

    It was a joint project with Steve to image M63 from our home observatories back in Spring 2017 that cemented the idea of us partnering in a shared remote observatory. So this image has a lot to answer for, especially from my wallet! It is such a splendid galaxy target . . . and it has been a real treat to image it once again and to capture its elusive faint outer warped halo, referred to below.

    From Wikipedia: "Messier 63 or M63, also known as NGC 5055 or the seldom-used Sunflower Galaxy,[6] is a spiral galaxy in the northern constellation of Canes Venatici. M63 was first discovered by the French astronomer Pierre Méchain then later verified by his colleague Charles Messier on June 14, 1779.[6] The galaxy became listed as object 63 in the Messier Catalogue. In the mid-19th century, Anglo-Irish astronomer Lord Rosse identified spiral structures within the galaxy, making this one of the first galaxies in which such structure was identified.[7] This galaxy has a morphological classification of SAbc,[5] indicating a spiral shape with no central bar feature and moderate to loosely wound arms. There is a general lack of large scale continuous spiral structure in visible light, a galaxy form known as flocculent. However, when observed in the near infrared a symmetric, two-arm structure becomes apparent. Each arm wraps 150° around the galaxy and extends out to 13 kly (4 kpc) from the nucleus.[8] . . . Radio observations at 21-cm show the gaseous disk of M63 extending outward to a radius of 40 kpc (130 kly), well past the bright optical disk. This gas shows a symmetrical form that is warped in a pronounced manner, starting at a radius of 10 kpc (33 kly). The form suggests the dark matter halo of the galaxy is offset with respect to the inner region. The reason for the warp is unclear, but the position angle points toward the smaller companion galaxy, UGC 8313.[11]"

    Data acquisition: Barry Wilson & Steve Milne
    Procesing: Steve Milne

    Comments

    Author

    Barry-Wilson
    Barry Wilson
    License: None (All rights reserved)
    159025
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    Messier 63 The Sunflower Galaxy, 





    
        

            Barry Wilson

    In these public groups

    Entre Encinas y Estrellas (e-EyE)