Hemisphere:  Northern  ·  Contains:  M 3  ·  NGC 5272
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Messier 3, 


Messier 3
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Messier 3

Imaging telescopes or lenses: CELESTRON EdgeHD 8

Imaging cameras: QHYCCD QHY8L

Mounts: Sky-Watcher NEQ-6 PRO GoTo SkyScan

Guiding telescopes or lenses: Skywatcher ED 80/600

Focal reducers: Celestron .7x

Software: EZCap  ·  PixInsight  ·  PHD Guiding 2.5.0

Accessory: Orion Starshoot Auto-Guider

Dates:April 8, 2014

Frames: 9x60" -15C bin 1x1

Integration: 0.1 hours

Flats: ~11

Bias: ~20

Avg. Moon age: 8.40 days

Avg. Moon phase: 60.73%

Mean FWHM: 2.40

Basic astrometry details

Astrometry.net job: 1125348

RA center: 13h 42' 12"

DEC center: +28° 24' 57"

Pixel scale: 1.082 arcsec/pixel

Orientation: -93.920 degrees

Field radius: 0.549 degrees

Resolution: 3040x2024

Locations: Duc, Prayssas, Lot et Garonne, France


Only 9 x 1 min run. I was not able to stack another set of 5sec exposures in PI without introducing al lot of noise. Anyway there is no saturated stars, which was the reason for short exposures.

Pre-processing done in Pixinsight :
- overscan area offset correction
- bias correction
- flat correction
- hot pixel correction
- debayer
- registration
- stack
Processing done in Pixinsight :
- backgroung color neutralisation
- color calibration using cluster
- residual sky background substraction
- color saturation boost
- green neutral
- non linear image creation
Final image :
- jpeg calibration done in Mac Photo (dark pt adjust, denoise)



License: None (All rights reserved)

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Sky plot


Messier 3,