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Contains:  NGC 2236, NGC 2239, NGC 2244, NGC 2252, Rosette nebula, The star 12Mon
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NGC 2237/38/39/44/46 Rosette Nebula and Open Star Cluster (Theli RGB UCAC4 v2/v3), 



    
        

            Martin Junius
NGC 2237/38/39/44/46 Rosette Nebula and Open Star Cluster (Theli RGB UCAC4 v2/v3)
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NGC 2237/38/39/44/46 Rosette Nebula and Open Star Cluster (Theli RGB UCAC4 v2/v3)

Technical card


Dates:Dec. 30, 2016

Frames:IDAS LPS V4: 33x600" ISO800

Integration: 5.5 hours

Darks: ~17

Flats: ~20

Bias: ~50

Avg. Moon age: 1.11 days

Avg. Moon phase: 1.40%

Bortle Dark-Sky Scale: 5.00

Mean SQM: 19.50

Temperature: -4.00


Basic astrometry details

Astrometry.net job: 1398269

RA center: 6h 31' 52"

DEC center: +5° 1' 8"

Pixel scale: 2.757 arcsec/pixel

Orientation: 90.004 degrees

Field radius: 2.411 degrees


Resolution: 5200x3548

Locations: Dellbrück, Köln, NW, Germany

Description

RGB calibration in Theli using UCAC4, not NOMAD as with the other pics, yielding less blue stars.
Original: added BW red channel as blended luminance layer to bring out details and the faint stuff.
Version B: standard RGB processing.

Comments on which approach works better highly welcome!

Comments

Author

phtnnz
Martin Junius
License: Attribution-NonCommercial-NoDerivs Creative Commons
1751
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Revisions

  • NGC 2237/38/39/44/46 Rosette Nebula and Open Star Cluster (Theli RGB UCAC4 v2/v3), 



    
        

            Martin Junius
    Original
  • Final
    NGC 2237/38/39/44/46 Rosette Nebula and Open Star Cluster (Theli RGB UCAC4 v2/v3), 



    
        

            Martin Junius
    B

B

Description: Standard RGB processing WITHOUT Red/Ha luminance.

Sky plot

Sky plot

Histogram

NGC 2237/38/39/44/46 Rosette Nebula and Open Star Cluster (Theli RGB UCAC4 v2/v3), 



    
        

            Martin Junius