Hemisphere:  Northern  ·  Constellation: Perseus (Per)  ·  Contains:  NGC 1267  ·  NGC 1268  ·  NGC 1270  ·  NGC 1272  ·  NGC 1273  ·  NGC 1274  ·  NGC 1275  ·  NGC 1277  ·  NGC 1278  ·  NGC 1281

Image of the day 02/15/2019

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    Galaxy Cluster Abell 426 in Perseus, 



    
        

            sydney
    Galaxy Cluster Abell 426 in Perseus
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    Galaxy Cluster Abell 426 in Perseus

    Image of the day 02/15/2019

    Getting plate-solving status, please wait...
      Galaxy Cluster Abell 426 in Perseus, 



    
        

            sydney
      Galaxy Cluster Abell 426 in Perseus
      Powered byPixInsight

      Galaxy Cluster Abell 426 in Perseus

      Acquisition details

      Dates:
      Jan. 30, 2019 ·  Jan. 31, 2019
      Frames:
      Astrodon I-series: 42×420(4h 54′) bin 2×2
      Luminance: 35×600(5h 50′) bin 1×1
      Integration:
      10h 44′
      Avg. Moon age:
      25.13 days
      Avg. Moon phase:
      20.54%

      Basic astrometry details

      Astrometry.net job: 2512640

      RA center: 03h19m25s.7

      DEC center: +41°3227

      Pixel scale: 0.513 arcsec/pixel

      Orientation: 240.183 degrees

      Field radius: 0.187 degrees

      Resolution: 2169x1472

      File size: 952.9 KB

      Data source: Backyard

      Description

      This is a section of the galaxy cluster Abell 426 in Perseus. It is about 250 million light-years away. The galaxy at the top of the picture is NGC 1275. While this object has an oval shape, we are actually looking at a spiral galaxy nearly edge-on as it emits gaseous filaments in multiple directions. NGC 1275 is also known as Perseus A and is a strong source of radio waves as well as X-rays from a black hole at its nucleus.

      A 2003 study suggests that NGC 1275 may be generating sound waves at a period of 9.6 million years. [https://academic.oup.com/mnras/article/344/3/L43/1015198] Wikipedia states that “no human will actually hear the note, because its time period between oscillations is 9.6 million years, which is 57 octaves below the keys in the middle of a piano.” [https://en.wikipedia.org/wiki/Perseus_Cluster] Rumor has it that the famed singer Pavarotti suffered two hernias during his career trying to reach a bass note this low.

      I collected about 26 hours (170 x 10 min) of luminance data for this image, but ended up using only 5.8 hours. The majority of imaging time was during the recent polar vortex and:

      1. seeing was horrendous

      2. winds were strong and gusty

      3. my wood stove was roaring and the cluster spent too much time in and around the chimney plume

      4. somehow my polar alignment got out of whack and I was too cold and lazy to correct it. I needed to take 1 second guiding exposures to keep the field from drifting so I was definitely chasing the seeing

      5. I left my camera at its -25C set point and the nights typically got much colder, so I lost my regulated cooling

      I don’t usually like to whine about my imaging sessions, but I know everyone here can relate to this. I collected my color data during the worst periods and although the raw files look awful, I was able to salvage color information. After the Perseus Cluster set into the chimney, I slewed the scope to begin imaging M82. That will be my next saga.

      Hope you enjoy the image.

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      Galaxy Cluster Abell 426 in Perseus, 



    
        

            sydney