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Contains:  M 104, NGC 4594, Sombrero galaxy

Image of the day 05/23/2019

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    Messier 104 – The Sombrero Galaxy, 


            Terry Robison
    Messier 104 – The Sombrero Galaxy
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    Messier 104 – The Sombrero Galaxy

    Technical card

    Dates:March 8, 2019

    Frames: 93x900" bin 0x0

    Integration: 23.2 hours

    Avg. Moon age: 1.67 days

    Avg. Moon phase: 3.11%

    Basic astrometry details job: 2702385

    RA center: 12h 39' 59"

    DEC center: -11° 37' 19"

    Pixel scale: 0.605 arcsec/pixel

    Orientation: 7.975 degrees

    Field radius: 0.266 degrees

    Resolution: 2636x1758

    Data source: Own remote observatory

    Remote source: Non-commercial independent facility


    This would have to be an object on many astrophotographers bucket list. I remember looking back at some textbooks from my university days and seeing M104. Sure it was black and white, but it was so very cool. Skip ahead in time, now, very modest instruments allow us to present incredible renditions of this and many other amazing objects.
    This is where imagination takes hold and things become skewed. I know this is all wrong, but when I look at this object it almost appears like a very bright light source is held captive, surrounded by large chunks of matter blocking its light and casting shadows into space. Yep, imagination can certainly conger up fascinating stuff. But slowly, reality takes over and you that there is no way that rocks that large are patrolling the outskirts of this wonderful galaxy .
    The Sombrero Galaxy has an incredible halo extending well beyond the frame of the image. It has to my eye, a slightly brownish tint to it. Several galaxies further away can be seen through the halo, but they are very small and this is where a large instrument with serious image scale would be a wonderful treat.
    The Sombrero Galaxy, Messier 104, NGC 4594 is a lenticular galaxy found in the constellation Virgo. It’s about a third of the size of our galaxy sporting an unusually large central bulge. One of the most striking features is the prominent dust lane in its inclined disk. This feature resembles a sombrero hat. The dust lane is a symmetrical ring that encloses the bulge of the galaxy. Where it crosses in front of the bulge, we can see the brightness of the galaxy extinguish, and the dark belt is revealed. The ring might also contain most of the cold matter in the Sombrero Galaxy.
    At the core, it is believed that one of the most massive black holes measured in any nearby galaxies resides.
    Some astronomers consider this galaxy to have the highest absolute magnitude within a radius of 10 megaparsecs of the Milky Way. Visually, this allows a simple set of binoculars to be used allowing the observer to just reveal its presence. Moving up in aperture, a 200 mm will allow you to distinguish the bulge from the disk. From there, 250-300 mm will reveal the dark lane.
    Of course, photographically every changes. This image was obtained using a modest 250 mm instrument, and monochromatic camera. If you had eyes the size of dinner plates and didn’t blink for a day, your friends might think you look like a freak, but hey, could you see it? There’s that imagination again…. Apologies.

    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

    Lum 33 X 900 seconds
    Ha 22 X 900 seconds
    Blue 11 X 900 seconds
    Green 10 X 900 seconds
    Red 17 X 900 seconds
    Total Time: 23.24 Hours



    Terry Robison
    License: None (All rights reserved)

    Sky plot

    Sky plot


    Messier 104 – The Sombrero Galaxy, 


            Terry Robison