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Contains:  M 77, NGC 1055, NGC 1068, NGC 1072

Image of the day 12/11/2018

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    NGC 1055 / NGC 1068 / Supernova SN 2018ivc, 


            Terry Robison
    NGC 1055 / NGC 1068 / Supernova SN 2018ivc
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    NGC 1055 / NGC 1068 / Supernova SN 2018ivc

    Technical card

    Dates:Dec. 5, 2018

    Frames: 98x900" bin 0x0

    Integration: 24.5 hours

    Avg. Moon age: 27.78 days

    Avg. Moon phase: 3.44%

    Basic astrometry details job: 2403370

    RA center: 2h 42' 18"

    DEC center: +0° 13' 37"

    Pixel scale: 0.803 arcsec/pixel

    Orientation: 145.492 degrees

    Field radius: 0.466 degrees

    Resolution: 3478x2318

    Data source: Own remote observatory

    Remote source: Non-commercial independent facility


    This image contains three interesting targets. The first two are the larger galaxies in the foreground, NGC 1055 (lower left), and NGC 1068 or Messier 77 (upper right). The third is a little harder to spot. Zoom in on the galaxy in the upper right. If you are familiar with M77, there is what appears to be a little star where no star was before. It’s near the core, at the six o’clock position. That new star like object is Supernova SN 2018ivc. If you are having difficulty spotting it, I constructed an animated gif that highlights the event. Click on the image to zoom in. and you will see it blinking in the animation.

    The top right galaxy has two names, Messier 77 or NGC 1068. It’s a barred spiral galaxy in the constellation Cetus, about 47 million light years away. Messier 77 has an estimated diameter of 170,000 light years and is one of the biggest galaxies of the Messier Catalogue. The apparent size when viewed from our vantage point is 7.1 X 6.0 arc min with an apparent magnitude of 9.6

    The galaxy in the lower left is NGC 1055. This is an edge-on spiral galaxy located in the same constellation, Cetus. It has a prominent bulge crossed by a wide knotty dark dust lane. If you look carefully, several bright Ha areas can be easily seen. NGC 155 is 52 million light years away, and has a diameter of about 115,800 light years across. The apparent size is 7.6 X 2.7 arc min with an apparent magnitude of 11.4. It’s a fairly dramatic look galaxy, and the glow around it is just amazing. I really like the look of this galaxy.

    Messier 77 and NGC 1044 are a binary system. Because of this, I really wanted to include both objects in the same frame. Normally, I would image each separately.

    The third object is the Supernova SN 2018ivc. The event happened midway during the imaging of this photo. At first, I thought it was my eyes or a guiding error. As I got more data, yep, something had changed. Once I realised this, I then heard about it. It only took 47 million years to get to us. What’s a few days to realize what you are looking at? If you’re interested in further information about the Supernova, there is a web page.

    Exposure Details:

    Lum 35X900
    Red 26X450
    Green 16X450
    Blue 16X450
    Ha 17X1800
    Total time 24.5 hours

    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

    Software Used

    CCDStack (calibration, alignment, data rejection, stacking)
    Photoshop CS 6 (Image processing)
    Thanks for looking



    Terry Robison
    License: None (All rights reserved)

    Sky plot

    Sky plot


    NGC 1055 / NGC 1068 / Supernova SN 2018ivc, 


            Terry Robison