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Imaging telescopes or lenses: Takahashi TSA 102
Imaging cameras: Canon EOS 1100D / Rebel T3
Mounts: Skywatcher AZ EQ6 GT
Guiding telescopes or lenses: Astro Professional 66/400 ED
Guiding cameras: M42 Optic PLA-M
Focal reducers: Takahashi TOA-RD
Software: Pleiades Astrophoto PixInsight 1.8 Ripley · O'Telescope Corporation BackyardEOS v3 · PHD Guiding 2
Filters: Baader Neodynium Moon & Skyglow
Dates:July 10, 2015
Frames: 25x300" ISO800
Integration: 2.1 hours
Avg. Moon age: 23.90 days
Avg. Moon phase: 31.77%
Astrometry.net job: 1287959
RA center: 18h 18' 55"
DEC center: -13° 49' 21"
Pixel scale: 0.872 arcsec/pixel
Orientation: -20.653 degrees
Field radius: 0.319 degrees
Resolution: 2142x1531
Locations: Saint-Avertin, Saint-Avertin, Indre-et-Loire, France
Data source: Backyard
A : M16 - Pixinsight Drizzle version of my previous image, with a specific processing.
B : Comparaison entre l'image d'origine à 200% et la version Drizzle à 100%
C : Illustration de l'ordre de grandeur des objets et des détails qu'on peut percevoir dans la nébuleuse.
Echelles : distance entre le soleil et l'étoile la plus proche, à savoir Proxima Centauri, arrondi à 4 AL, ainsi qu'une représentation du nuage de Oort sous la forme d'une sphère de 1,6 AL. Pour les calculs, M16 est considérée à une distance de 7000AL.
Un pixel sur l'image représente 0,03 AL, soit environ 1900 UA.
L'un des plus fins détails perceptible sur la photo est la bande plus lumineuse entre deux zones plus sombres tout en haut du pilier gauche, qui a une dimension de 4,12 pixels, soit 7838 UA (pour rappel : l'orbite de Pluton est d'environ 40 UA... on pourrait donc inclure près de 200 fois la distance soleil-pluton dans cette bande, qui représenterait à l'échelle 0,02 pixels...).
Dans l'encart du bas, j'ai inséré le globule de Bok bien visible plus à droite des piliers. Je trouve intéressant de voir que celui-ci a des dimensions tout à fait comparables à celle du nuage de Oort !
JB
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