Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  NGC 3675  ·  NGC3675  ·  PGC2224610  ·  PGC2225399  ·  PGC2225461  ·  PGC2226754  ·  PGC2227347
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NGC 3675 A dusty galaxy in Ursa Major, 



    
        

            Vitali
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NGC 3675 A dusty galaxy in Ursa Major

Imaging telescopes or lenses: Celestron EdgeHD 11

Imaging cameras: ZWO ASI071MC Pro

Mounts: 10Micron GM1000HPS

Software: PixInsight  ·  Sequence Generator Pro


Dates:Jan. 20, 2020

Frames: 408x120"

Integration: 13.6 hours

Avg. Moon age: 25.21 days

Avg. Moon phase: 19.65%


Astrometry.net job: 3396586

RA center: 11h 26' 7"

DEC center: +43° 35' 10"

Pixel scale: 0.351 arcsec/pixel

Orientation: -93.176 degrees

Field radius: 0.272 degrees


Resolution: 3000x4700

Locations: Rooftop terrace, Near Stuttgart, Germany

Data source: Backyard

Description

NGC 3675 is a magnitude 10 spiral galaxy, which belongs to the Ursa Major Cluster. It is about 40 millions light years away from us. The galaxy has a rich dust structure. The spiral disc includes a number of blue (star forming?) regions. The dim outer arms are barely visible on this image.

There are a number of small galaxies in the field (annotated).

The image consists of 408 unguided exposures 120 seconds each.

Comments

Revisions

  • NGC 3675 A dusty galaxy in Ursa Major, 



    
        

            Vitali
    Original
  • NGC 3675 A dusty galaxy in Ursa Major, 



    
        

            Vitali
    B
  • NGC 3675 A dusty galaxy in Ursa Major, 



    
        

            Vitali
    C
  • Final
    NGC 3675 A dusty galaxy in Ursa Major, 



    
        

            Vitali
    D

B

Description: Entire field. Reprocessed from scratch, as I continue to learn PixInsight. This revision is based on the CFA drizzle integration result. The galaxy has been used as the white reference in the ColorCalibration tool. I've used 'UnsharpMask' once on all bright objects and twice on the galaxy to increase the contrast. Morphological Transformation with a contour star mask has been used for removing the bright star galos. Comments and suggestions are appreciated. Thanks!

Uploaded: ...

C

Description: Reprocessed from scratch as a PixInsight exercise. I like this revision more than the original and B. The galaxy was used as the white reference for ColorCalibration and SCNR was applied to the final image.

Uploaded: ...

D

Description: PixInsight experiments. ColorCalibration using the galaxy as a white reference.

Uploaded: ...

Sky plot

Sky plot

Histogram

NGC 3675 A dusty galaxy in Ursa Major, 



    
        

            Vitali