Celestial hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  NGC 4712  ·  NGC 4725

Image of the day 04/23/2017

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    NGC4725 and neighbours, tommy_nawratil
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    NGC4725 and neighbours

    Image of the day 04/23/2017

    Getting plate-solving status, please wait...
      NGC4725 and neighbours, tommy_nawratil
      Powered byPixInsight

      NGC4725 and neighbours

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      Description

      Combining the 3,8µm pixels of ASI1600MMC with my Lacerta Photonewton's 1000mm focal length resultes in a pixel scale of 0,78arcsec/pixel - a healthy oversampling if seeing has mercy. The 16MP chip covers around 40arcmin on the sky, and even tiny NGC4712 (2arcmin long, and smaller axis only the size of Jupiter!) is resolved into wealth of detail. NGC4725 is 11x7arcmin, and the galaxy with the huge tideal streamers is NGC4747 or No.159 in the catalog of Halton Arp.

      I have added 100% crops of NGC4725 and 4747, check out for details!

      ASI1600MMC here works at unity gain, a LRGB of 143x46x32x32 subs of 180sec each.

      I did a search in Aladin/VizieR on a small area north of 4725 - the faintest stars are about 23mag

      http://aladin.u-strasbg.fr/java/nph-aladin.pl?from=VizieR&script=get%20Aladin%2012%2050%2040.523%20%2B25%2038%2047.84%2010arcmin%3Bsync%3Bget%20VizieR%28V/139%29

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        NGC4725 and neighbours, tommy_nawratil
        Original
      • Final
        NGC4725 and neighbours, tommy_nawratil
        B
        NGC4725 and neighbours, tommy_nawratil
        C
        NGC4725 and neighbours, tommy_nawratil
        D

      B

      Description: NGC4725 and NGC4712 crop

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      C

      Description: NGC4747 crop

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      D

      Description: annotated version

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      NGC4725 and neighbours, tommy_nawratil