Hemisphere:  Southern  ·  Constellation: Cetus (Cet)  ·  Contains:  NGC 247  ·  NGC247
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NGC 247, 



    
        

            Geoff
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NGC 247

Imaging telescopes or lenses: Plane Wave Instruments CDK 12.5"

Imaging cameras: Finger Lakes Instruments Proline 16803

Mounts: AP900GTO

Guiding cameras: Starlight Xpress Lodestar guide camera

Software: PixInsight  ·  MaximDL

Filters: Astronomik L R G B Series II


Dates:Oct. 26, 2019

Frames: 82x600"

Integration: 13.7 hours

Avg. Moon age: 27.64 days

Avg. Moon phase: 3.99%


Astrometry.net job: 3466712

RA center: 0h 47' 10"

DEC center: -20° 45' 15"

Pixel scale: 1.740 arcsec/pixel

Orientation: 87.970 degrees

Field radius: 0.512 degrees


Resolution: 1500x1500

Locations: Wiruna Dark Sky Site, Ilford, NSW, Australia

Data source: Traveller

Description

NGC 247 is one of several galaxies that is gravitationally bound to the Silver Coin Galaxy NGC 253. It is an intermediate spiral galaxy (although it is sometimes classified as a dwarf spiral galaxy) about 11.1 Mly away in the constellation Cetus. The galaxy displays an obvious void on the north side of its spiral disk, but the exact nature and cause of this feature is not clear. The void contains some older, redder stars but no younger, bluer stars.

The string of four galaxies just below and right of NGC 247 is known as Burbidge's Chain. These galaxies are about 300 million light-years distant. Deep images reveal that the two bottom-most galaxies in the chain are apparently interacting, joined by a faint bridge of material. This bridge can just be seen in this photograph.

Comments

Revisions

  • NGC 247, 



    
        

            Geoff
    Original
  • NGC 247, 



    
        

            Geoff
    C
  • Final
    NGC 247, 



    
        

            Geoff
    D

C

Description: Reduced flare from out of field star. Changed framing

Uploaded: ...

D

Description: Ha added

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NGC 247, 



    
        

            Geoff