Hemisphere:  Northern  ·  Constellation: Serpens (Ser)  ·  Contains:  PGC54559
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HOAGS Object Ringgalaxy, 



    
        

            Riedl Rudolf
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HOAGS Object Ringgalaxy

Getting plate-solving status, please wait...
HOAGS Object Ringgalaxy, 



    
        

            Riedl Rudolf
Powered byPixInsight

HOAGS Object Ringgalaxy

Technical card

Imaging telescopes or lenses: Celestron C11 XLT

Imaging cameras: Nikon D5100a

Mounts: Sky-Watcher EQ-8 pro

Focal reducers: Starizona FF Reducer 0,71x

Software: Pixinsight 1.8

Filters: IDAS HE2-N3

Accessory: MGEN II Autoguider with 9x50mm finderscope


Dates:March 16, 2020

Frames: 27x422" (3h 9' 54") ISO1600

Integration: 3h 9' 54"

Darks: 25

Flats: 25

Bias: 25

Avg. Moon age: 22.23 days

Avg. Moon phase: 49.12%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 21.40

Temperature: -5.00


Astrometry.net job: 3820982

RA center: 15h 17' 13"

DEC center: +21° 34' 53"

Pixel scale: 0.466 arcsec/pixel

Orientation: -114.460 degrees

Field radius: 0.315 degrees


Resolution: 4146x2544

Locations: Home, St. Peter/O., Steiermark, Austria

Data source: Backyard

Description

Hoags Object is a perfect Ringgalaxy. Around a older Center is a circle of young stars.

It was discovered by Hoag, therefore the name. The Diameter of the center is 6". The inner part of the ring has a diameter of 28", the outer part of 45". The brightness is 16th mag.

The Galaxy is in a distance of about 600 Mio Lj and has a slightly smaller diameter than our Milky Way but contains more stars!

I took already several pictures, but always failed the position. This time finally it works.

Data from Wikipedia

Comments

Revisions

  • HOAGS Object Ringgalaxy, 



    
        

            Riedl Rudolf
    Original
  • Final
    HOAGS Object Ringgalaxy, 



    
        

            Riedl Rudolf
    C

C

Description: A bit less green

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Histogram

HOAGS Object Ringgalaxy, 



    
        

            Riedl Rudolf

In these public groups

Rarely Imaged Small DSOs