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Contains:  M 13, Great Cluster in Hercules, NGC 6205
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Messier 13, 


Messier 13

Messier 13

Technical card

Resolution: 3040x2024

Dates:July 26, 2016Aug. 1, 2016Aug. 9, 2016

Frames: 17x900" -15C bin 1x1

Integration: 4.2 hours

Darks: ~7

Flats: ~5

Bias: ~50

Avg. Moon age: 18.68 days

Avg. Moon phase: 31.90%

Mean SQM: 21.00

Mean FWHM: 2.40

Temperature: 18.00 job: 1497987

RA center: 250.444 degrees

DEC center: 36.463 degrees

Pixel scale: 0.756 arcsec/pixel

Orientation: -178.956 degrees

Field radius: 0.383 degrees

Locations: Duc, Prayssas, Lot et Garonne, France


Equipment used :
first & 2nd night : AO with OAG
3rd nights : AO + ONAG (on axis guiding)

No dithering on first night subs.

Pre-processing done in Pixinsight :
- overscan area offset correction
- bias correction
- dark correction using 7 x 1800 s darks
- flat correction
- hot pixel correction
- debayer
- registration
- stack
Processing done in Pixinsight :
- backgroung color neutralisation
- color calibration using cluster
- sky background removal (DBE in PI)
- slight deconvolution
- non linear image creation
- color saturation boost masked
- TGV denoise (no mask)
Final image :
- jpeg calibration done in Mac Photo (levels adjust and further saturation boost)



License: None (All rights reserved)

Sky plot

Sky plot


Messier 13,