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Contains:  M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205
Getting plate-solving status, please wait...
M31 Andromeda, 





    
        

            Joostie
M31 Andromeda

M31 Andromeda

Link to TIFF/FITS: http://www.drogenberg.be

Technical card

Resolution: 5840x3894

Dates:Sept. 6, 2018

Frames:Optolong L-Pro 2" Nikon T-Ring: 15x180" ISO800 bin 1x1

Integration: 0.8 hours

Darks: ~30

Flats: ~40

Bias: ~70

Avg. Moon age: 25.83 days

Avg. Moon phase: 14.72%

Bortle Dark-Sky Scale: 5.00

Mean SQM: 20.30

Temperature: 15.00

Astrometry.net job: 2251709

RA center: 10.598 degrees

DEC center: 41.189 degrees

Pixel scale: 1.799 arcsec/pixel

Orientation: 264.151 degrees

Field radius: 1.754 degrees

Locations: Meldert @Home, Hoegaarden, Vlaams Brabant, Belgium

Data source: Backyard

Description

The mandatory Andromeda picture!

Conditions were not that good, lots of lightpollution tnx to the high humidity. Clouds were drifting by, with the sky completely covered by times. in addtion the guiding went completely bezirk for unknown reasons, maybe bad cable management: 3 to 4" jumps in the PHD2 graph and sometimes RA or Dec going totally off chart! nice...

Anyhow pleased nevertheless, it could use a lot more data I guess: this is only 45 minutes ; main objective was to test the 3" TS0.79x Focal Reducer of the FF Nikon. Stars are pretty sharp overall, but there is some noticable vignetting that needs to be flatted out ; also visible in the subs is an interaction with the Optolong Pro LPS filter giving round interference gradients. A remnant of that is visible in the upper right corner of this image.

the F5 versus the F7 should however result in about 2x faster imaging ; I'm not sure how the pixelscale of 2,2"/pix versus 1,4"/pix will be noticeable?

Clear Skies

Comments

Author

Joostie
Joostie
License: Attribution-NonCommercial-NoDerivs Creative Commons
1511
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Revisions

  • M31 Andromeda, 





    
        

            Joostie
    Original
  • M31 Andromeda, 





    
        

            Joostie
    B
  • Final
    M31 Andromeda, 





    
        

            Joostie
    C

B

Correction of the red upper corner

C

HLVG Applied

Sky plot

Sky plot

Histogram

M31 Andromeda, 





    
        

            Joostie