Hemisphere:  Northern  ·  Constellation: Draco (Dra)  ·  Contains:  IC2600  ·  IC2601  ·  NGC 3147  ·  NGC3144  ·  NGC3147  ·  NGC3183  ·  NGC3252  ·  NGC3343  ·  NGC3348  ·  NGC3364  ·  NGC3403
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IFN between NGC3403 and NGC3147 in Draco, 



    
        

            Göran Nilsson
Powered byPixInsight

IFN between NGC3403 and NGC3147 in Draco

Getting plate-solving status, please wait...
IFN between NGC3403 and NGC3147 in Draco, 



    
        

            Göran Nilsson
Powered byPixInsight

IFN between NGC3403 and NGC3147 in Draco

Imaging telescopes or lenses: Celestron RASA 8" F/2

Imaging cameras: ZWO ASI2600MC-Pro

Mounts: iOptron CEM70

Guiding telescopes or lenses: SkyWatcher 80/400 achromatic

Guiding cameras: Starlight Xpress Lodestar Autoguider X2

Software: PixInsight 01.08 Ripley  ·  PHOTOSHOP CS5


Dates:April 2, 2021

Frames: 68x300" (5h 40')

Integration: 5h 40'

Avg. Moon age: 20.10 days

Avg. Moon phase: 71.08%


Astrometry.net job: 4386619

RA center: 10h 36' 24"

DEC center: +72° 58' 8"

Pixel scale: 2.973 arcsec/pixel

Orientation: 5.299 degrees

Field radius: 2.156 degrees


Resolution: 4280x2976

Locations: Home Observatory, Hole, Värmland, Sweden

Data source: Backyard

Description

For my two RASAs this is IFN season. IFN (Integrated Flux Nebulosity) is thought to be dust at the outskirts of our galaxy energized by the collective radiation of the galaxy. I do find that there seem to be a variety of IFN when it comes to colour and structure. Here is an image with quite a lot of galaxies behind the IFN and version A shows an annotation of them (done in PI).

I have recently had quite a lot of messages from disappointed RASA users aiming at IFN under more light polluted skies. Hunting IFN is a very rewarding activity under dark skies, and I have a quite dark site. SQM was around 21.6 these nights, so Bortle 2. Sadly, with more light pollution, like at Bortle 4-5, many times longer integration times will be needed get an S/N ratio good enough to get a decent IFN image. For every unit decrease in SQM, 2.5 times more integration time is needed, so at SQM 20.6 (Bortle 4.5), you would need 14 hours and at SQM 19.6 (Bortle 5) your will need 30 hours.

Comments

Revisions

  • IFN between NGC3403 and NGC3147 in Draco, 



    
        

            Göran Nilsson
    Original
  • Final
    IFN between NGC3403 and NGC3147 in Draco, 



    
        

            Göran Nilsson
    B

B

Description: Un-annotated version

Uploaded: ...

Sky plot

Sky plot

Histogram

IFN between NGC3403 and NGC3147 in Draco, 



    
        

            Göran Nilsson