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Contains:  M 106, NGC 4258, NGC 4248

Image of the day 02/08/2018

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    M106 - A Nearby Seyfert Galaxy, 


            Jason Guenzel
    M106 - A Nearby Seyfert Galaxy

    M106 - A Nearby Seyfert Galaxy

    Technical card

    Resolution: 4420x3316

    Dates:Jan. 19, 2018Jan. 26, 2018Jan. 28, 2018

    Blue: 30x240" -20C bin 1x1
    Green: 30x240" -20C bin 1x1
    Luminance: 152x180" -20C bin 1x1
    Red: 30x240" -20C bin 1x1

    Integration: 13.6 hours

    Darks: ~50

    Flats: ~50

    Bias: ~256

    Avg. Moon age: 7.48 days

    Avg. Moon phase: 53.04%

    Bortle Dark-Sky Scale: 5.00 job: 1912571

    RA center: 184.722 degrees

    DEC center: 47.304 degrees

    Pixel scale: 0.527 arcsec/pixel

    Orientation: 272.146 degrees

    Field radius: 0.404 degrees


    Messier 106 does appear to be a fairly typical intermediate spiral about 24 million light years from us. That puts it about 10 times further than the Andromeda Galaxy and it is actually roughly the same size. It is one of the closer large galaxies to the Milky Way, though outside our immediate group.

    It may look docile enough, but at its core lies a supermassive black hole with a very active and super-luminous accretion disk. This places it into the category of a Type 2 Seyfert galaxy and it is one of the nearest of ones. Seyfert galaxies spew massive amounts of radiation in wavelengths that are quite beyond the capturing capability of my equipment. In fact M106's core generates a water vapor megamaser (a microwave water laser, doesn't that sound fun?). But, let's just agree it is a hostile place.

    The warped outer reaches of the galactic arms suggest some past interactions. The suspected culprit is NGC4217 which is an edge on spiral that is outside this frame (off the bottom).

    M106 is one of the larger galaxies in the night sky but framed up nicely with my system. I squeezed this image out in three nights imaging and cheated a bit shooting some of it under moonlight. I hate doing that, but desperate times....

    One oddity in this processing produced one very bright green source to the left of the galaxy. I'm going to have to figure that out. Very strange.



    Jason Guenzel
    License: None (All rights reserved)

    Sky plot

    Sky plot


    M106 - A Nearby Seyfert Galaxy, 


            Jason Guenzel