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I agreeImaging telescope or lens:Takahashi FS 152
Imaging camera:QSI 683 WSG-8
Mount:10Micron 1000HPS
Guiding telescope or lens:William Optics Megrez 80
Guiding camera:The Imaging Source DMK 41AU02.AS
Focal reducer:Takahashi Reducer 0.66
Software:PixInsight 1.8, Cyril Cavadore Prism7
Resolution: 2732x2048
Dates:April 20, 2018
Frames: 71x180"
Integration: 3.5 hours
Avg. Moon age: 4.77 days
Avg. Moon phase: 23.64%
Astrometry.net job: 2035727
RA center: 210.804 degrees
DEC center: 54.349 degrees
Pixel scale: 1.388 arcsec/pixel
Orientation: 0.517 degrees
Field radius: 0.658 degrees
Locations: Observatoire personnel : Andromède, Villars-sur-Glâne, Switzerland
Data source: Backyard
Seeing 4.3
M101 (NGC 5457 ou galaxie du Moulinet), est une galaxie spirale, vue de face, située dans la Grande Ourse à une distante d'environ 7 Mpc (∼22,8 millions d'a.l.). Son diamètre de 170 000 années-lumière est 70 % plus grand que celui de la Voie lactée (100 000 années-lumière) pour une masse stellaire de l'ordre de 1 000 milliards de masses solaires, environ dix fois la masse de notre galaxie.
Source : Wikipédia.
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