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Contains:  NGC 2442, NGC 2434

Image of the day 03/28/2018

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    NGC 2442 The Meathook Galaxy, 





    
        

            Terry Robison
    NGC 2442 The Meathook Galaxy

    NGC 2442 The Meathook Galaxy

    Technical card

    Resolution: 3468x2438

    Dates:March 18, 2018

    Frames: 76x900"

    Integration: 19.0 hours

    Avg. Moon age: 0.95 days

    Avg. Moon phase: 1.01%

    Astrometry.net job: 1979246

    RA center: 114.079 degrees

    DEC center: -69.513 degrees

    Pixel scale: 0.804 arcsec/pixel

    Orientation: 183.634 degrees

    Field radius: 0.474 degrees

    Description

    56 million light years away, in the constellation of Volans, there is a dramatic lopsided intermediate spiral galaxy known as the Meathook Galaxy. Its asymmetric shape has one arm tightly folded in, while the other is dotted with star forming regions that extend far out from its galactic nucleus. These regions are trailing off to the left on the lower arm, and have a slightly pink and reddish colours.

    The galaxy itself is around 110,000 light years across and is moving away from us at 1466 kilometres per second. I have always enjoyed looking at interesting shaped galaxies as usually have an interesting history. In this instance, around 200 million years ago, there may have been a gravitational interaction with the fuzzy galaxy to the lower right, AM 0738-692. If you look carefully, there is a fairly easy to spot almost edge background galaxy, around the two o’clock position.

    Within inner region of NGC 2442, there is a background galaxy just popping through. I had to resort to some Hubble images to verify, and there it was. That is so cool to be able to see a galaxy through a closer galaxy. To locate it, draw a line from the core, moving outwards toward the 4:30 clock position, and there is what looks like a horizontal line perpendicular to the line you have just drawn out. It is very subtle. Another feature to help locate it, look at the ends of a forked brownish structure that connects back to the core of the galaxy. There are quite a few dim, far off galaxies throughout the frame.

    Exposure Details
    16 Blue Binned 2X2 – 450 Sec each
    17 Green Binned 2X2 – 450 Sec each
    19 Red Binned 2X2 – 450 Sec each
    19 Lum Binned 1X2 – 900 Sec each
    14 Ha Binned 1x1 – 1200 Sec

    Instruments Used:
    10 Inch RCOS fl 9.1
    Astro Physics AP-900 Mount
    SBIG STL 11000m
    FLI Filter Wheel
    Astrodon Lum, Red, Green, Blue Filters
    Baader Planetarium H-alpha 7nm Narrowband-Filter

    Comments

    Author

    trobison
    Terry Robison
    License: None (All rights reserved)
    7939
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    NGC 2442 The Meathook Galaxy, 





    
        

            Terry Robison